Upcoming Events: Online Gardening Classes

Looking for an online gardening class?

The garden season is winding down, but there is always work to be done in the garden.

Check out these classes being offered by Cornell Cooperative Extensions around the state.

Click on the topic to see what classes are being offered.

Bulbs

Clump of white daffodils with bright orange centers and yellow daffodilsSelecting and Planting Bulbs

Thursday, September 16, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County


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Composting

Full Wooden Compost BinMagic of Compost

Saturday, September 26, 2020
10:00 AM – 11:00 AM
Cornell Cooperative Extension
Suffolk County

Back to the Top

Famous Gardens

The High Line Garden in NYC in the spring with pink flowering treesGardening Tips from the High Line

Thursday, September 17, 2020
11:00 AM – 12:00 PM
Cornell Cooperative Extension
Suffolk County

The High Line Garden in NYC in the spring with pink flowering treesThe High Line: Lessons for your Garden

Wednesday, October 7, 2020
11:00 AM – 12:00 PM
Cornell Cooperative Extension
Suffolk County

Back to the Top

Ornamentals

Clump of white daffodils with bright orange centers and yellow daffodilsSelecting and Planting Bulbs

Thursday, September 16, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

Dividing PerennialsMany rubekia (black eyed-susans), yellow flowers with raised brown centers

Tuesday, October 6, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

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Soil

Two hands holding finished compostImproving Your Garden Soil

Tuesday, September 29, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

A trowel stuck in a raised garden bedSecrets of Soil

Tuesday, October 6, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Suffolk County

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Vegetable Gardening

Five freshly harvested heads of garlicGrowing Great Garlic

Tuesday, September 21, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

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Winterizing Your Garden

Snow covered clusters of Red Berries on a bushPutting Your Garden to Bed

Tuesday, September 22, 2020
3:00 PM – 4:00 PM
Cornell Cooperative Extension
Chemung County

Tree covered with lots of snowWinterizing Your Garden

Tuesday, October 13, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

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Upcoming Events: Online Gardening Classes

Looking for an online gardening class?

The garden season is winding down, but there is always work to be done in the garden.

Check out these classes being offered by Cornell Cooperative Extensions around the state.

Click on the topic to see what classes are being offered.

Upcoming Events: Online Gardening Classes

Looking for an online gardening class?

Check out these classes being offered by Cornell Cooperative Extensions around the state.

Click on the topic to see what classes are being offered.

 

Back to the Top

Upcoming Events: Online Gardening Classes

Looking for an online gardening class?

Check out these classes being offered by Cornell Cooperative Extensions around the state.

Click on the topic to see what classes are being offered.

Composting

Two hands holding finished compostMagic of Compost

Tuesday, August 18, 2020
3:00 PM – 4:00 PM
Cornell Cooperative Extension
Suffolk County

Three large compost bins, one made of wire fencing and two made of palletsMagic of Compost

Tuesday, September 8, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Suffolk County

Two hands holding finished compostMagic of Compost

Saturday, September 26, 2020
10:00 AM – 11:00 AM
Cornell Cooperative Extension
Suffolk County

Back to the Top

Famous Gardens

Downton AbbeyThe Gardens of Downton Abbey

Wednesday, August 12, 2020
11:00 AM – 12:00 PM
Cornell Cooperative Extension
Suffolk County

The High Line Garden in NYC in the spring with pink flowering treesThe High Line: Lessons for Gardeners

Tuesday, August 25, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Suffolk County

The High Line Garden in NYC in the spring with pink flowering treesGardening Tips from the High Line

Thursday, September 17, 2020
11:00 AM – 12:00 PM
Cornell Cooperative Extension
Suffolk County

The High Line Garden in NYC in the spring with pink flowering treesThe High Line: Lessons for your Garden

Wednesday, October 7, 2020
11:00 AM – 12:00 PM
Cornell Cooperative Extension
Suffolk County

Back to the Top

Gardening for Birds

Hummingbird feeding from a red flowerHummingbirds in your Garden

Tuesday, August 25, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Suffolk County

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Gardening with Pets

German Shepherd sitting in the lawn infron of a peony plant with large magenta blossomsPet Friendly Plants

Thursday, September 3, 2020
12:00 PM – 12:45 PM
Cornell Cooperative Extension
Genessee County

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Healing Gardens

A stone path running through the APline Gardne full of color and textureHealing Gardens

Thursday, August 13, 2020
6:30 pm – 7: 30 pm
Cornell Cooperative Extension
Broome County

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Insects

Yellow beetle with black spotsGarden Insect ID & Organic Controls

Wednesday, August 12, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

Monarch Buttery Presentation

Tuesday, August 18, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Monroe County

Back to the Top

Invasive Plants

FOur-petaled white flowers on a garlic mustard plantInvasive Species

Thursday, August 20, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Warren County

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Lawns

Close up of lush green grasLawns Love Fall

Thursday, August 13, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Suffolk County

Close up of lush green grasLawns Love Fall

Thursday, August 13, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Suffolk County

Close up of lush green grasLawns Love Fall

Wednesday, August 26, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Suffolk County

Close up of lush green grasLawns Love Fall

Monday, August 31, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Suffolk County

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Ornamentals

Blue HydrangeasHydrangeas

Tuesday, August 18, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Suffolk County

FOur-petaled white flowers on a garlic mustard plantInvasive Species

Thursday, August 20, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Warren County

German Shepherd sitting in the lawn infron of a peony plant with large magenta blossomsPet Friendly Plants

Thursday, September 3, 2020
12:00 PM – 12:45 PM
Cornell Cooperative Extension
Genessee County

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Pest Management

Yellow beetle with black spotsGarden Insect ID & Organic Controls

Wednesday, August 12, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

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Soil

Light purple clover flower against a background of green leavesCover Crops for the Home Garden

Wednesday, August 26, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

A trowel stuck in a raised garden bedSecrets of Soil

Tuesday, October 6, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Suffolk County

Back to the Top

Vegetable Gardening

Five freshly harvested heads of garlicGrowing Great Garlic

Wednesday, August 19, 2020
6:30 PM – 7:30 PM
Cornell Cooperative Extension
Broome County

Back to the Top

Upcoming Events: Online Gardening Classes

Looking for an online gardening class?

Check out these classes being offered by Cornell Cooperative Extensions around the state.

Click on the topic to see what classes are being offered.

Composting

Two hands holding finished compostMagic of Compost

Tuesday, August 18, 2020
3:00 PM – 4:00 PM
Cornell Cooperative Extension
Suffolk County

Three large compost bins, one made of wire fencing and two made of palletsMagic of Compost

Tuesday, September 8, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Suffolk County

Two hands holding finished compostMagic of Compost

Saturday, September 26, 2020
10:00 AM – 11:00 AM
Cornell Cooperative Extension
Suffolk County

Back to the Top

Edible Plants

Red and green tomatoes on a tomato plant Plants and Backyard Farm

Monday, August 3, 2020
10:30 AM – 11:15 AM
Cornell Cooperative Extension
Suffolk County

Back to the Top

Famous Gardens

Downton AbbeyThe Gardens of Downton Abbey

Wednesday, August 12, 2020
11:00 AM – 12:00 PM
Cornell Cooperative Extension
Suffolk County

The High Line Garden in NYC in the spring with pink flowering treesThe High Line: Lessons for Gardeners

Tuesday, August 25, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Suffolk County

The High Line Garden in NYC in the spring with pink flowering treesGardening Tips from the High Line

Thursday, September 17, 2020
11:00 AM – 12:00 PM
Cornell Cooperative Extension
Suffolk County

The High Line Garden in NYC in the spring with pink flowering treesThe High Line: Lessons for your Garden

Wednesday, October 7, 2020
11:00 AM – 12:00 PM
Cornell Cooperative Extension
Suffolk County

Back to the Top

Gardening for Birds

Hummingbird feeding from a red flowerHummingbirds in your Garden

Tuesday, August 25, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Suffolk County

Back to the Top

Healing Gardens

A stone path running through the APline Gardne full of color and textureHealing Gardens

Thursday, August 13, 2020
6:30 pm – 7: 30 pm
Cornell Cooperative Extension
Broome County

Back to the Top

Insects

Swallow Tail Butterfly, yellow and black, feed ing off pink flowersInsects

Tuesday, August 4, 2020
2:00 PM – 2:45 PM
Cornell Cooperative Extension
Suffolk County

Monarch Buttery PresentationBlack and orange Monarch Butterfly feeding on a purple flower

Thursday, August 6, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Monroe County

Yellow beetle with black spotsGarden Insect ID & Organic Controls

Wednesday, August 12, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

Monarch Buttery Presentation

Tuesday, August 18, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Monroe County

Back to the Top

Invasive Plants

FOur-petaled white flowers on a garlic mustard plantInvasive Species

Thursday, August 20, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Warren County

Back to the Top

Lawns

Close up of lush green grasLawns Love Fall

Tuesday, August 4, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Suffolk County

Close up of lush green grasLawns Love Fall

Thursday, August 13, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Suffolk County

Close up of lush green grasLawns Love Fall

Thursday, August 13, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Suffolk County

Close up of lush green grasLawns Love Fall

Wednesday, August 26, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Suffolk County

Close up of lush green grasLawns Love Fall

Monday, August 31, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Suffolk County

Back to the Top

Ornamentals

A vegetable garden with a combination of cabbage surrounded by small yellow and orange flowers and dark purple leafy greensAugust – What to do in the Garden this Month

Wednesday, August 5, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

Shade GardeningSahde garden with two large containers of blooming hostas

Thursday, August 6, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Warren County

Blue HydrangeasHydrangeas

Tuesday, August 18, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Suffolk County

FOur-petaled white flowers on a garlic mustard plantInvasive Species

Thursday, August 20, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Warren County

Back to the Top

Pest Management

Yellow beetle with black spotsGarden Insect ID & Organic Controls

Wednesday, August 12, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

Back to the Top

Poisonous Plants

What Evil Lurks in the Heart of Your Garden?

Wednesday, August 5, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Orange County

Back to the Top

Soil

Light purple clover flower against a background of green leavesCover Crops for the Home Garden

Wednesday, August 26, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

A trowel stuck in a raised garden bedSecrets of Soil

Tuesday, October 6, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Suffolk County

Back to the Top

Vegetable Gardening

Red and green tomatoes on a tomato plant Plants and Backyard Farm

Monday, August 3, 2020
10:30 AM – 11:15 AM
Cornell Cooperative Extension
Suffolk County

Raised Garden bed with Cabbage, kael and lettuce, fitted with tubbing to for row coverPlanting Fall Vegetables

Wednesday, August 5, 2020
6:30 PM – 7:30 PM
Cornell Cooperative Extension
Broome County

A vegetable garden with a combination of cabbage surrounded by small yellow and orange flowers and dark purple leafy greensAugust – What to do in the Garden this Month

Wednesday, August 5, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

Six heads of large heasd of green and red leetuce grwoing in a raised garden bedRaised Bed Gardening

Thursday, August 6, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Monroe County

Five freshly harvested heads of garlicGrowing Great Garlic

Wednesday, August 19, 2020
6:30 PM – 7:30 PM
Cornell Cooperative Extension
Broome County

Back to the Top

Upcoming Events: Online Gardening Classes

Looking for an online gardening class?

Check out these classes being offered by Cornell Cooperative Extensions around the state.

Click on the topic to see what classes are being offered.

Composting

Full Wooden Compost BinBasics of Organic Composting

Tuesday, July 28, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Monroe County

Two hands holding finished compostMagic of Compost

Tuesday, August 18, 2020
3:00 PM – 4:00 PM
Cornell Cooperative Extension
Suffolk County

Three large compost bins, one made of wire fencing and two made of palletsMagic of Compost

Tuesday, September 8, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Suffolk County

Two hands holding finished compostMagic of Compost

Saturday, September 26, 2020
10:00 AM – 11:00 AM
Cornell Cooperative Extension
Suffolk County

Back to the Top

Edible Plants

Red and green tomatoes on a tomato plant Plants and Backyard Farm

Wednesday, July 29, 2020
7:00 PM – 7:45 PM
Cornell Cooperative Extension
Suffolk County

Red and green tomatoes on a tomato plant Plants and Backyard Farm

Monday, August 3, 2020
10:30 AM – 11:15 AM
Cornell Cooperative Extension
Suffolk County

Back to the Top

Famous Gardens

Downton AbbeyThe Gardens of Downton Abbey

Wednesday, August 12, 2020
11:00 AM – 12:00 PM
Cornell Cooperative Extension
Suffolk County

The High Line Garden in NYC in the spring with pink flowering treesThe High Line: Lessons for Gardeners

Tuesday, August 25, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Suffolk County

The High Line Garden in NYC in the spring with pink flowering treesGardening Tips from the High Line

Thursday, September 17, 2020
11:00 AM – 12:00 PM
Cornell Cooperative Extension
Suffolk County

The High Line Garden in NYC in the spring with pink flowering treesThe High Line: Lessons for your Garden

Wednesday, October 7, 2020
11:00 AM – 12:00 PM
Cornell Cooperative Extension
Suffolk County

Back to the Top

Gardening for Birds

Hummingbird feeding from a red flowerHummingbirds in your Garden

Tuesday, August 25, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Suffolk County

Back to the Top

Healing Gardens

A stone path running through the APline Gardne full of color and textureHealing Gardens

Thursday, August 13, 2020
6:30 pm – 7: 30 pm
Cornell Cooperative Extension
Broome County

Back to the Top

Insects

Convergent Lady Beetle (Hippodmia convergens) on a leafMeet the Beneficial Insects

Wednesday, July 29, 2020
6:30 PM – 7:30 PM
Cornell Cooperative Extension
Broome County

Swallow Tail Butterfly, yellow and black, feed ing off pink flowersInsects

Tuesday, August 4, 2020
2:00 PM – 2:45 PM
Cornell Cooperative Extension
Suffolk County

Monarch Buttery PresentationBlack and orange Monarch Butterfly feeding on a purple flower

Thursday, August 6, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Monroe County

Yellow beetle with black spotsGarden Insect ID & Organic Controls

Wednesday, August 12, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

Monarch Buttery Presentation

Tuesday, August 18, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Monroe County

Back to the Top

Lawns

Close up of lush green grasLawns Love Fall

Tuesday, August 4, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Suffolk County

Close up of lush green grasLawns Love Fall

Thursday, August 13, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Suffolk County

Close up of lush green grasLawns Love Fall

Thursday, August 13, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Suffolk County

Close up of lush green grasLawns Love Fall

Wednesday, August 26, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Suffolk County

Close up of lush green grasLawns Love Fall

Monday, August 31, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Suffolk County

Back to the Top

Native Plants

Four Echinacea or Cone Flowers in a garden - large flowers with dark pink petals and spikely centersGardening with Native Plants

Wednesday, July 29, 2020
1:00 PM – 2:00 PM
Cornell Cooperative Extension
Monroe County

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Ornamentals

A vegetable garden with a combination of cabbage surrounded by small yellow and orange flowers and dark purple leafy greensAugust – What to do in the Garden this Month

Wednesday, August 5, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

Blue HydrangeasHydrangeas

Tuesday, August 18, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Suffolk County

Back to the Top

Pest Management

A hand how and a gloved hand pulling weedsGarden Weed Identification and Management

Wednesday, July 29, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

Yellow beetle with black spotsGarden Insect ID & Organic Controls

Wednesday, August 12, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

Back to the Top

Pollinators

Bumble bee on a pink flowerPollinator Gardens

Thursday, July 30, 2020
11:00 AM – 12:00 PM
Cornell Cooperative Extension
Suffolk County

Back to the Top

Poisonous Plants

What Evil Lurks in the Heart of Your Garden?

Wednesday, July 29, 2020
12:00 PM – 1:00 PM
Cornell Cooperative Extension
Orange County

What Evil Lurks in the Heart of Your Garden?

Wednesday, August 5, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Orange County

Back to the Top

Soil

Light purple clover flower against a background of green leavesCover Crops for the Home Garden

Wednesday, August 26, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

A trowel stuck in a raised garden bedSecrets of Soil

Tuesday, October 6, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Suffolk County

Back to the Top

Vegetable Gardening

Red and green tomatoes on a tomato plantPlants and Backyard Farm

Wednesday, July 29, 2020
7:00 PM – 7:45 PM
Cornell Cooperative Extension
Suffolk County

Red and green tomatoes on a tomato plant Plants and Backyard Farm

Monday, August 3, 2020
10:30 AM – 11:15 AM
Cornell Cooperative Extension
Suffolk County

Raised Garden bed with Cabbage, kael and lettuce, fitted with tubbing to for row coverPlanting Fall Vegetables

Wednesday, August 5, 2020
6:30 PM – 7:30 PM
Cornell Cooperative Extension
Broome County

A vegetable garden with a combination of cabbage surrounded by small yellow and orange flowers and dark purple leafy greensAugust – What to do in the Garden this Month

Wednesday, August 5, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

Six heads of large heasd of green and red leetuce grwoing in a raised garden bedRaised Bed Gardening

Thursday, August 6, 2020
7:00 PM – 8:00 PM
Cornell Cooperative Extension
Monroe County

Five freshly harvested heads of garlicGrowing Great Garlic

Wednesday, August 19, 2020
6:30 PM – 7:30 PM
Cornell Cooperative Extension
Broome County

Back to the Top

Weeds

A hand how and a gloved hand pulling weedsGarden Weed Identification and Management

Wednesday, July 29, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Tompkins County

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Pest Watch Update: Bagworms!

by Susan Ndiaye, Community Horticulture Educator

It is time to revisit our post on bagworms! Over the weekend, I was notified by the National Phenology Network that bagworm caterpillars will be emerging in our area in the next six days. If you need to treat a tree that has been infested with bagworms in the past, it is important to do so soon after emergence when the caterpillars are small, as treatments are not effective against larger caterpillars.


pinecone like structure hanging on an evergreen tree

Have you ever noticed one of these structures hanging on a Colorado blue spruce or an arborvitae? They kind of look like pine cones, but not exactly. Well, they aren’t pine cones, but silken bags spun and decorated by bagworms (Thyridopteryx ephemeraeform).

Bagworms are moths whose larvae feed on evergreens such as spruce, juniper, pine and arborvitae. The larvae can also feed on deciduous trees such as maple, elm, birch and sycamore. Bagworms defoliate the trees and shrubs they infest. In large numbers, bagworms can cause significant defoliation, which can lead to the death of the plant.

Bagworm Lifecycle

In late spring, bagworm eggs, which overwinter in their mother’s silken bag, hatch and caterpillars emerge. These caterpillars begin to form new silk bags, and as they eat, they cover it with bits of leaves. As the caterpillar grows, it expand its bags. Then in late summer the caterpillar firmly attaches its bag to the plant and pupates.

Adult male bagworm - clear winged moth with furry brown body
Adult male bagworm

Complete metamorphosis from caterpillar to moth takes about four weeks. Adult male bagworms emerge from their bags as clear winged moths and begin to search for a mate. Adult female bagworms are wingless moths and never leave their bags. After mating females produce 500-1000 eggs before dying. Their eggs overwinter inside their mother’s silken bag and the whole cycle begins again.

Management

Because bagworms are protected by their silken bag, management can be tricky. For smaller trees and shrubs the best tactic is to remove and destroy the bags by hand. Unfortunately, this is not possible in all instances, especially on larger trees and shrubs. Insecticides are most effective right after bagworm eggs hatch, when the caterpillars are small.

But how does one know when the eggs are going to hatch? Well, it turns out that there is a “Bagworm Forecast” that you can check in the spring to determine the best time to apply insecticide. The maps provided by this forecast are updated daily and available six days in the future, so you can plan ahead.

For recommendations on pesticides, check out the resources below. And as always, make sure you read and follow all the instructions on the pesticide label including the use of personal protective equipment. The label is the law!

If you need to spray a larger tree, you may need to contact an arborist. Click here to find a certified arborist near you.

Fun Facts

As females don’t fly, you may wonder how bagworms spread. Bagworm caterpillars can balloon, or use their silk threads to catch the wind and travel long distances.

Despite relatively little protection for overwintering bagworm eggs, research at Purdue University found that it takes a 24 hr period at -0.6 ° F or below to kill the eggs. So if you live in Orange County New York don’t expect a cold winter to kill off your bagworms.

Here is a video of a bagworm feeding!

Video from Purdue University Landscape Report (https://www.purduelandscapereport.org/article/824/)

Resources

Bagworm – Penn State University

Bagworms – Cornell University

Bagworm Forecast – USA National Phenology Network

Bagworms on Landscape Plants – University of Kentucky

Cold weather in January 2018 may have killed bagworms in some parts of Indiana – Landscape Report, Purdue University

Upcoming Events: Online Gardening Classes

Looking for an online gardening class?

Check out these classes being offered by Cornell Cooperative Extensions around the state.

Click on the topic to see what classes are being offered.

Container Gardening

A short wooden tub set next to a tree overflowing with plants: a tall grass with red leaves, a bright green plant with white veins and a dark purple plant spilling over the edge.Creative Container Gardening

Wednesday, May 27, 2020
6:00 PM – 8:00 PM
Cornell Cooperative Extension
Tompkins County

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Composting

Full Wooden Compost BinComposting

Monday, May 18, 2020
4:00 PM – 5:00 PM
Cornell Cooperative Extension
Onondaga County

Two hands holding finished compostBuilding Soil and Composting

Tuesday, May 19, 2020
5:00 PM – 6:00 PM
Cornell Cooperative Extension
Chenango County

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Fruit

Two small light green fruits (pawpaws) growing of a branchGrowing Unusual Fruits

Wednesday, May 20, 2020
6:00 PM – 8:00 PM
Cornell Cooperative Extension
Tompkins County

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Herb Gardening

Bright Green Herb Plants - Chives, Basil, ParsleyGrowing Culinary HerbsSOLD OUT!!

Wednesday, May 20, 2020
6:30 pm
Cornell Cooperative Extension
Broome County

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Insects

Close-up of a leaf cutting bee on a yellow flowerPollinator Gardens

Monday, May 18, 2020
1:00 PM – 2:00 PM
Cornell Cooperative Extensions
Jefferson County

Yellow beetle with black spotsPest and Disease Management

Tuesday, May 26, 2020
5:00 PM – 6:00 PM
Cornell Cooperative Extension
Chenango County

Swallow Tail Butterfly, yellow and black, feed ing off pink flowersCreating a Butterfly GardenSOLD OUT!

Monday, May 27, 2020
6:30 PM
Cornell Cooperative Extensions
Broome County

Green lacewing - green bodied bug with large net-like wings sitting on a flower with pink petals and a yellow centerAll About Bugs: pollinators and more!

Thursday, May 28, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Warren County

Squash bug adult laying eggsGarden Pests

Thursday, May 28, 2020
3:00 PM – 4:00 PM
Cornell Cooperative Extension
Madison County

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Pest Management

A hand how and a gloved hand pulling weedsWeed Identification and Management SOLD OUT!

Tuesday, May 19, 2020
6:30 PM
Cornell Cooperative Extension
Broome County

A pair of gloved hands holding some freshly picked weedsGarden Weeds

Thursday, May 21, 2020
3:00 PM – 4:00 PM
Cornell Cooperative Extension
Madison County

Yellow beetle with black spotsPest and Disease Management

Tuesday, May 26, 2020
5:00 PM – 6:00 PM
Cornell Cooperative Extension
Chenango County

Squash bug adult laying eggsGarden Pests

Thursday, May 28, 2020
3:00 PM – 4:00 PM
Cornell Cooperative Extension
Madison County

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Pollinators

Close-up of a leaf cutting bee on a yellow flowerPollinator Gardens

Monday, May 18, 2020
1:00 PM – 2:00 PM
Cornell Cooperative Extensions
Jefferson County

Swallow Tail Butterfly, yellow and black, feed ing off pink flowersCreating a Butterfly GardenSOLD OUT!

Monday, May 27, 2020
6:30 PM
Cornell Cooperative Extensions
Broome County

Back to the Top

Soil

Two hands holding finished compostBuilding Soil and Composting

Tuesday, May 19, 2020
5:00 PM – 6:00 PM
Cornell Cooperative Extension
Chenango County

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Technology as a Gardening Tool

Taking a picture of a field of flowers with a smart phoneUsing Your Cell Phone as a Gardening Tool

Wednesday, May 20, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Orange County

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Vegetable Gardening

A vegetable garden with a combination of cabbage surrounded by small yellow and orange flowers and dark purple leafy greensCaring for Your Vegetable Garden

Monday, May 18, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Chemung County

A cluster of cherry tomatoes growing on a tomato plant wet with the morning dew.Family Food Gardens for Beginners

Thursday, May 21, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Warren County

Pile of cucumbers, a red, yellow and green pepper, green onions, tomatoes, a bunch of parsley and a sprig of rosemaryHow Does Your Garden Grow Check-In

Thursday, June 11, 2020
3:00 PM – 4:00 PM
Cornell Cooperative Extension
Madison County

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Weeds

A hand how and a gloved hand pulling weedsWeed Identification and ManagementSOLD OUT!

Tuesday, May 19, 2020
6:30 PM
Cornell Cooperative Extension
Broome County

A pair of gloved hands holding some freshly picked weedsGarden Weeds

Thursday, May 21, 2020
6:00 PM – 7:00 PM
Cornell Cooperative Extension
Madison County

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Upcoming Events: Online Gardening Classes

Looking for an online gardening class?

Check out these classes being offered by Cornell Cooperative Extensions around the state.

Click on the topic to see what classes are being offered.

Container Gardening

 Large green pot with a plant with pink flowere, a short plant with white flowers and a varigated plant spilling over the sideContainer Gardening

Monday, May 11, 2020
4:00 PM – 5:00 PM
Cornell Cooperative Extension
Onondaga County

A short wooden tub set next to a tree overflowing with plants: a tall grass with red leaves, a bright green plant with white veins and a dark purple plant spilling over the edge.Creative Container Gardening

Wednesday, May 13, 2020
6:00 PM – 8:00 PM
Cornell Cooperative Extension
Tompkins County

A small child in a jean shirt, teal skirt and bright yellow rain boots put seeds in the groundSeed Starting and Container Gardening with Kids

Thursday, May 14, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Warren County

A short wooden tub set next to a tree overflowing with plants: a tall grass with red leaves, a bright green plant with white veins and a dark purple plant spilling over the edge.Creative Container Gardening

Wednesday, May 27, 2020
6:00 PM – 8:00 PM
Cornell Cooperative Extension
Tompkins County

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Composting

Pile of kitchen scraps, mostly peels of various fruits and vegetables, spead out on top of a compost pileHome Composting

Monday, May 11, 2020
1:00 PM – 2:00 PM
Cornell Cooperative Extension
Jefferson County

Full Wooden Compost BinComposting

Monday, May 18, 2020
4:00 PM – 5:00 PM
Cornell Cooperative Extension
Onondaga County

Two hands holding finished compostBuilding Soil and Composting

Tuesday, May 19, 2020
5:00 PM – 6:00 PM
Cornell Cooperative Extension
Chenango County

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Fruit

Quince Tree with two large green quince fruit - almost apple like in shapeFruit 102: Growing Unusual Fruits: An Introduction to Unfamiliar Fruits

Monday, May 11, 2020
6:00 PM – 8:00 PM
Cornell Cooperative Extension
Steuben County

Two small light green fruits (pawpaws) growing of a branchGrowing Unusual Fruits

Wednesday, May 20, 2020
6:00 PM – 8:00 PM
Cornell Cooperative Extension
Tompkins County

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Gardening with Kids

A small child in a jean shirt, teal skirt and bright yellow rain boots put seeds in the groundSeed Starting and Container Gardening with Kids

Thursday, May 14, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Warren County

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Herb Gardening

Bright Green Herb Plants - Chives, Basil, ParsleyGrowing Culinary Herbs

Wednesday, May 20, 2020
6:30 pm
Cornell Cooperative Extension
Broome County

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Insects

Spotted Lanternfly adult on a green stemSpotted Lanternfly Workshop

Wednesday, May 13, 2020
9:30 AM – 12:00 PM
Cornell Cooperative Extension
Ulster County

Close-up of a leaf cutting bee on a yellow flowerPollinator Gardens

Monday, May 18, 2020
1:00 PM – 2:00 PM
Cornell Cooperative Extensions
Jefferson County

Yellow beetle with black spotsPest and Disease Management

Tuesday, May 26, 2020
5:00 PM – 6:00 PM
Cornell Cooperative Extension
Chenango County

Swallow Tail Butterfly, yellow and black, feed ing off pink flowersCreating a Butterfly Garden

Monday, May 27, 2020
6:30 PM
Cornell Cooperative Extensions
Broome County

Green lacewing - green bodied bug with large net-like wings sitting on a flower with pink petals and a yellow centerAll About Bugs: pollinators and more!

Thursday, May 28, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Warren County

Squash bug adult laying eggsGarden Pests

Thursday, May 28, 2020
3:00 PM – 4:00 PM
Cornell Cooperative Extension
Madison County

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Invasive Species

Spotted Lanternfly adult on a green stemSpotted Lanternfly Workshop

Wednesday, May 13, 2020
9:30 AM – 12:00 PM
Cornell Cooperative Extension
Ulster County

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Pest Management

A hand how and a gloved hand pulling weedsWeed Identification and Management

Tuesday, May 19, 2020
6:30 PM
Cornell Cooperative Extension
Broome County

A pair of gloved hands holding some freshly picked weedsGarden Weeds

Thursday, May 21, 2020
3:00 PM – 4:00 PM
Cornell Cooperative Extension
Madison County

Yellow beetle with black spotsPest and Disease Management

Tuesday, May 26, 2020
5:00 PM – 6:00 PM
Cornell Cooperative Extension
Chenango County

Squash bug adult laying eggsGarden Pests

Thursday, May 28, 2020
3:00 PM – 4:00 PM
Cornell Cooperative Extension
Madison County

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Pollinators

Close-up of a leaf cutting bee on a yellow flowerPollinator Gardens

Monday, May 18, 2020
1:00 PM – 2:00 PM
Cornell Cooperative Extensions
Jefferson County

Swallow Tail Butterfly, yellow and black, feed ing off pink flowersCreating a Butterfly Garden

Monday, May 27, 2020
6:30 PM
Cornell Cooperative Extensions
Broome County

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Soil

Two hands holding finished compostBuilding Soil and Composting

Tuesday, May 19, 2020
5:00 PM – 6:00 PM
Cornell Cooperative Extension
Chenango County

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Technology as a Gardening Tool

Taking a picture of a field of flowers with a smart phoneUsing Your Cell Phone as a Gardening Tool

Wednesday, May 20, 2020
6:30 PM – 8:30 PM
Cornell Cooperative Extension
Orange County

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Vegetable Gardening

Assortment of heirloom vegetables on a blanket - tomatoes of various sizes, sizes colors and shapes, hote egg plants, a cucumber, a purple pepper, a pile of green beans, a few foot long beansGrowing History: Planning an Heirloom Vegetable Garden

Monday, May 11, 2020
10:00 AM – 11:30 AM
Cornell Cooperative Extension
Delaware County

A cucurbit seedling showing the two cotyledons and the first true leaf just starting to unfold.Planting a Vegetable Garden

Monday, May 11, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Chemung County

Pepper seedlings in tray of biodegradeable potsSeed Starting

Tuesday, May 12, 2020
5:00 PM – 6:00 PM
Cornell Cooperative Extension
Chenango County

A small child in a jean shirt, teal skirt and bright yellow rain boots put seeds in the groundSeed Starting and Container Gardening with Kids

Thursday, May 14, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Warren County

A vegetable garden with a combination of cabbage surrounded by small yellow and orange flowers and dark purple leafy greensCaring for Your Vegetable Garden

Monday, May 18, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Chemung County

A cluster of cherry tomatoes growing on a tomato plant wet with the morning dew.Family Food Gardens for Beginners

Thursday, May 21, 2020
2:00 PM – 3:00 PM
Cornell Cooperative Extension
Warren County

Pile of cucumbers, a red, yellow and green pepper, green onions, tomatoes, a bunch of parsley and a sprig of rosemaryHow Does Your Garden Grow Check-In

Thursday, June 11, 2020
3:00 PM – 4:00 PM
Cornell Cooperative Extension
Madison County

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Weeds

A hand how and a gloved hand pulling weedsWeed Identification and Management

Tuesday, May 19, 2020
6:30 PM
Cornell Cooperative Extension
Broome County

A pair of gloved hands holding some freshly picked weedsGarden Weeds

Thursday, May 21, 2020
6:00 PM – 7:00 PM
Cornell Cooperative Extension
Madison County

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Pest Watch: Emerald Ash Borer

by Susan Ndiaye, Community Horticulture Educator

Close up of an ash tree in which the bark has fallen off leaving a light tan color area
Woodpecker damage on ash tree

Hopefully you’ve spent some time outside enjoying the beautiful spring weather we had last weekend.   Did you noticed any ash trees that look like they have been completely stripped of their bark?  Did you wonder what happened?  Did you think it was a disease, an insect or maybe a deer?  This damaged is actually caused by woodpeckers.  They are searching for emerald ash borer larvae which can be found just below the bark.

Slender shiny emerald green beetle with large black eyes standing on a leaf
Adult emerald ash borer

The emerald ash borer (Agrilus planipennis) is an shiny emerald-colored jewel beetle.  Native to Asia, it was first discovered in North America near Detroit, Michigan in 2002 (most likely hitching a ride here in solid wood packing materials used in the transportation of goods).

Despite its beauty, the emerald ash borer is an invasive insect and has killed hundreds of millions of ash trees throughout North America.  As of April 2020, it has been found in 35 states and 5 Canadian provinces costing municipalities, property owners, nursery operators and forestry product industries hundreds of millions of dollars.

Emerald Ash Borer Lifecycle as described in the textLifecycle

Emerald ash borers, like all beetles, undergo complete metamorphosis.  Usually in June and July, adult females lay 60-90 eggs on the bark of ash trees (Fraxinus spp.).  The eggs hatch and the larvae bore through the outer bark and begin feeding on the inner bark or phloem of the ash tree.  The larvae feed for several weeks growing to rough 1 to 1.25 inches in length.  The larvae then overwinter in the bark.  In the spring they pupate and finally in May and June emerge as adults and exit their host tree by creating a D-shaped whole in the bark.  The adults feed on the leaves of the ash tree, mate, and females lay eggs starting the cycle over.

Damage

As mentioned before, the larvae of the emerald ash borer feed on the inner bark or phloem of the ash tree.  The phloem is part of the vascular system of the plant and is responsible for transporting the sugars produced by photosynthesis in the leaves to the rest of tree.  Damage to the phloem cuts of the nutrient supply and eventually leads to the death of the tree.

An ashe tree with no leaves inthe canopy but lots of leafy shoots covering the trunk
Dying ash tree

One of the first symptoms produced by an emerald ash borer infestation is a thinning canopy.  With fewer leaves the tree’s ability to produce food through photosynthesis decreases and as a result the tree may produce lots of  shoots that sprout from the roots and trunk.  The leaves on these shoots are often larger than normal as the tree tries to compensate for its loss of photosynthetic capability.   The tree’s canopy will continue to thin eventually leaving the tree bare.

Many people do not notice that the canopy of their ash tree is thinning.  For many people, the first symptom that they notice is the woodpecker damage on the trunk.  At this point the tree is usually heavily infested by emerald ash borer and will soon succumb to the infestation.

Management

The emerald ash borer was first detected in New York State in 2009 over in  Cattaraugus County.   Two years later, in 2011, it was detected here in Orange County.  As of right now the majority of trees in Orange County have been infested by the emerald ash borer and are showing signs of decline or have died.   Once you notice that the canopy of your ash tree is thinning  there has already been extensive damage to the vascular system of the tree and even with treatment there is little chance of recovery.

Deciding whether or not to treat your ash tree is up to you.  The first thing to do is make sure you properly identify your tree.

Once you have properly identified your tree there are three option: cut it, treat it, or leave it.

Cut It

Ash trees that create a potential hazard (i.e. proximity to a building) need to be removed.   If you cannot safely remove the tree yourself,  look for a certified arborist near you at www.treesaregood.org.   Many ash trees are being turned into firewood.  Keep in mind that New York State law prohibits the movement of firewood more than 50 miles (linear distance) from its source, specifically to prevent the accidental movement of invasive species like the emerald ash borer.   Don’t Move Firewood!Dontmovefirewood.org

Treat It

Remember that that if you tree is already showing signs of decline it is probably too late to save it through treatment.

If you decide you want to treat your ash tree(s), it is not just a one time investment.  Most treatments only last one or two years before they wear off leaving the tree susceptible to infestation.  This means trees need to be treated ever couple years since at the moment the emerald ash borer looks like it is here to stay.

There are many insecticides on the market that are labeled for emerald ash borer.  Many of them need to be applied by a certified pesticide applicator.  If you are interested in protecting your ash tree(s) check out  Insecticide Options for Protecting Ash Trees from Emerald Ash Borer for more information.

Leave It

If your ash tree poses no potential hazard, consider leaving it.  Although the emerald ash borer has killed millions of ash trees here in North America, there is hope the identification of “lingering ash” or an ash that stays healthy after nearby trees have overwhelmingly succumbed to the emerald ash borer.  The identification of “lingering ash” could help achieve ash species conservation.   Click here to learn more about how you can become a citizen scientist with the Lingering Ash Search through the Monitoring and Managing Ash Program.Decision Tree integrating long-term conservation perspective: Cut it, Treat it, Leave it, Treat

Fun Facts
Biological Control

Although there are some predatory wasps that feed on emerald ash borers, the two avenues of biological control that have shown potential in being able to help manage populations of emerald ash borer are parasitoid wasps and entomopathogenic fungi.

parasitoid wasp
Parasitoid wasp (Spathius galinae)

Let’s start with the parasitoid wasps.  Three species of parasitoid wasps found in the emerald ash borer’s native range were were considered potential biological control agents.  These parasitoids are natural enemies of the emerald ash borer and have long ovipositors that allow them to drill into the ash trees and lay their eggs on the emerald ash borer larvae.  Once the eggs hatch the wasp larvae consume the emerald ash borer larvae alive.  (Note: In order to get permission to release these parasitoid wasps in the United Stated, it took four or five years of research to make sure that they  were host specific to emerald ash borer and wouldn’t impact any other similar species.)  Of the three species released, two are showing promise, although research is still being done regarding their dispersal, spread, and ability to overwinter.

Onto the entomopathogenic fungus, Beauveria bassiana.  When spores of this fungus come in contact with the emerald ash borer, they germinate and penetrate the cuticle of the insect.  The fungus continues growing inside the insect eventually killing it.  Although research has show that this fungus can kill the emerald ash borer, more research is need to see if it is effective form a biological control out in the field.

Phenology
Two adult emerald ash borers emerging from an ash tree. One one is have way out and the other's head is just visble as in the D-shaped hole it has created.
Two emerging adult emerald ash borers

Many things in nature are governed by the weather, such as the hatching of bagworm eggs and in this case the emergence of emerald ash borer adults.  You can track this year’s emergence using the “Emerald Ash Borer Forecast“.  This forecast is updated daily and available six days in the future.  Emerald ash borer adults are rarely seen.  Once they emerge, they fly up into the canopy to feed on the leaves.  But if you know when they are emerging you can be on the look out and might be lucky enough to find one.

The Oleaceae Family
Olive tree branch with two clusters of olives
Olive tree

The ash tree is a member of the Oleacae Family and researchers have found that the emerald ash borer can also complete its life cycle in another well-known member of the Oleacae family, the olive tree (Olea europaea).  Although this has only been shown in a laboratory project, there is a possibility that the emerald ash borer could become a problem for olive growers.

Another member of the Oleacae family, the white fringetree (Chionanthus virginicus) is also used as a host for the emerald ash borer.  Although when infested some of these trees don’t survive, a recent study found that white fringetrees are likely to withstand attacks by the emerald ash borer.

Resources

Ash Tree Identification – Michigan State University Extension

Distinguishing Ash from other Common Trees – Michigan State University Extension

Emerald Ash Borer Information Network

Emerald Ash Borer Forecast – National Phenology Network

Insecticide Options for Protecting Ash Trees from Emerald Ash Borer

Signs and Symptoms of the Emerald Ash Borer – Michigan State University Extension

Cornell Cooperative Extension Orange County

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