Tag Archives: Weeds

Poison Ivy – Don’t scratch

“Lewis Ziska, one of the lead scientists on the six-year study in a forest at Duke University, found that with increased atmospheric CO2 we get bigger, stronger, leafier poison ivy.” – Mary Woodsen, Poison ivy (like the Rolling Stones said …)

Just what we needed. Bigger, healthier, more toxic poison ivy.

New leaves on an old vine. Note the root-like structures gripping to the tree trunk.

New leaves on an old vine. Note the root-like structures gripping the tree trunk.

Poison ivy has a wide variety of habits – it’s often a climber with thick, woody vines. The vines are covered with rootlike hairs that help it cling to tree trunks or fences, which is a great way to distinguish it from other vines such as Virginia creeper. You will likely see this form most often on school grounds as it climbs fences, trees, and buildings.

It can also be standalone plants with a groundcover quality to them. And it can present in a shrub-like manner – most commonly seen along woodland edges.

The famous saying, “Leaves of three, let it be” is the one feature common to all growth forms. Those leaves, however, can range from ½” on new plants to over 5 inches long on older plants. They are usually smooth, but they can be toothed and sometimes lobed. Young leaves are usually reddish, older leaves can be a deep green, turning red or yellow in the fall. Shinyness is an option, therefore you can’t count on it to confirm your identification.

It's in there, and a quick inspection could have saved me a lot of itching.

Poison ivy is in there, and a quick inspection could have saved me a lot of itching.

And sometimes, it’s just hidden. As I type this blog, my fingers are pink with calamine lotion and I am trying desperately not to rub them against my pants. After a trying day, I vented my frustration on a neglected mulched area under a tree. I noticed the small poison ivy plants tucked into the other weeds only after I had ripped them out with my bare hands. I washed my hands with soap and water to remove the offending urushiol, the toxic oil that causes the dermatitis. But I wasn’t fast enough. A few days later, here come the blisters.

So, the motivation to check the NYS IPM resources on poison ivy management was strong. Here’s what I found on the School IPM Best Practices website:

Give it a trim. Often

Take a closer look. The leaves of three are less obvious when poison ivy gets bushy.

Poison ivy does not like to be trimmed. Mowing or cutting back young growth will deplete the energy in the roots. Plant stems, aerial vines and underground creeping stems are all capable of producing new nodes and leaves, so continue to monitor and trim. For best results, cut back new growth at the base of the plant.

Using a weed whacker is not recommended without full protective gear as plant material can be kicked back and land on exposed skin. Or in your eyes (shudder).

DO NOT BURN! The oils can be distributed through the smoke. It’s bad enough in between your fingers. You do not want to experience that kind of rash in your lungs.

Spot applications of a nonselective herbicide can be helpful for hard to reach locations or if you are extremely sensitive, but you need to follow the regulations laid out in the Child Safe Playing Fields Act and other state regulations. And remember, plants killed by herbicides will still have urushiol and can cause a rash.

In fact, the longlasting oils are present on all parts of the plant whether the plant is actively growing, dormant, or dead. So…

Wash your equipment!

Once on skin, tools, clothes, boots, and gloves, the oils need to be removed with soap and water. If you mowed poison ivy, urushiol may still be present on the mower blades the next time you remove them to sharpen them. If you used goats (yes, goats have been used to remove poison ivy), it could be in their hair. Take precautions.

And, for goodness sake, give a quick visual check before plunging into handweeding.

One last thought – according to the Cornell Lab of Ornithology, poison ivy “produces just the kind of fat-rich berries that are essential for sustaining migrating birds during fall and year-round residents in the winter”. So if you have poison ivy in an out-of-the-way area, consider leaving it behind for its wildlife value.

Now, if you will excuse me, I need to take another benadryl.

 

 

Vengeful veggies – contributed by Paul Hetzler

I know that vegetables are not really vindictive, but it sounds crazy to talk about them as a burning hazard. There are a number of plants whose sap can cause serious chemical burns, and one of them is a common and widespread invasive species, the wild parsnip.

Wild parsnip provides an opportunity to expand our vocabulary. It is phytophototoxic.

A member of the same family as Queen Anne’s lace, wild parsnip generally reaches a height of between three and seven feet. From late June through mid-July, it is topped by pale greenish-yellow, umbrella-like flower clusters, which form seeds around the end of July. Wild parsnip can be found in vacant lots as well as in yards and gardens, but because it’s so effectively spread by mowing equipment, mile upon mile of it can be seen along northern NY State roadsides.

The root of this weed is in fact edible. It’s genetically identical to the parsnip we might plant in our garden. So what exactly is bad about wild parsnip?

Giant hogweed gets a lot of press due to the fact that, well, it’s giant. A flower that grows 15 to 20 feet in one season is impressive. And hogweed is scary, too, because its sap is phytophototoxic. The tongue-twister word means if its sap gets on your skin, it reacts with sunlight to cause second- and third-degree burns. Such burns often take months to heal and may actually leave a permanent scar. If sap gets in one’s eyes, it can even cause blindness.

Well guess what—wild parsnip sap does the same thing. It’s a small consolation, but you can’t get burned by merely brushing up against wild parsnip—a stem or leaf must be broken to expose the sap. And after the plant dries it is safe to handle, unlike poison ivy, which can cause a severe rash even if you dried it for a couple years (which is unlikely, but if you were considering it, be warned). All the same, it’s probably a good idea to wear gloves and long sleeves when handling wild parsnip.

As everyone knows, when fighting a zombie, you grab a shovel and aim for its head. The same with wild parsnip, except you aim for its feet. It has a taproot That’s tough to pull out, but it is easily cut with a shovel. It’s not necessary to get the whole root—just dig as deep as you can to sever the taproot, pry up until the plant tips over, and it will die. You don’t even have to touch it.

If you’re hopelessly outnumbered by wild parsnips, at least mow them—wearing protective clothing and eyewear of course—to keep them from making seeds. But unless you have a Level-A Hazmat suit, don’t use a string trimmer on it. Mowing will buy you some time to muster shovel-wielding townsfolk (pitchforks and torches are optional) to help you.

Glyphosate, the active ingredient in herbicides like Roundup, is effective against wild parsnip. Herbicide is most effective when used on first-year plants (“rosettes”), ones which have no flower stalk, in late summer or early fall. Spraying early in the season will kill the top but not the root, so the plant may come back if treated in spring or early summer. (EDITORIAL NOTE: New York’s Child Safe Playing Field Act requires that most pesticide applications, including glyphosate, made on the portions of school or childcare facility grounds frequented by children may only be done when approved as an emergency exemption. For more information: https://blogs.cornell.edu/schoolchildcareipm/tag/child-safe-playing-fields-act/page/3/ )

I hope you have a safe and enjoyable summer, and that the only scorching you encounter is that walk across the hot beach sand.

For more information on wild parsnip, giant hogweed or other invasive species, contact your local Cornell Cooperative Extension office.

–Paul Hetzler
Cornell Cooperative Extension of St. Lawrence County

Keeping the Pests Out on a Budget: IPM workshops for safe playing fields

“An investment in knowledge pays the best interest.” –  Benjamin Franklin

Calling all school, parks, and sports turf managers and lawn care providers! You have two chances to join the Cornell Turf Team as we look at the latest information on providing safe playing surfaces on sports fields.

June 27, 9:00 a.m. to 3:00 p.m.
Lakeview Elementary School, Mahopac, NY
Full program | Pre-registration required by June 20
Contact: Jennifer Stengle js95@cornell.edu

August 3, 9:00 a.m. to 3:00 p.m.
Coxsackie-Athens High School, Coxsackie, N.Y.
Full program | Pre-registration required by July 28
Contact: Joellen Lampman jkz6@cornell.edu

Topics will include the basics (fertility, irrigation, mowing); advanced techniques (overseeding, seed selection, and turf repair); pest prevention, identification and management; and more.

Coffee and lunch are included. The workshop is free for schools and parks personnel. All other turf managers, please bring $25.

NYS DEC Pesticide Credits: 4.25 in Categories 3a, 3b, 10; STMA CEUs: .375

For more information and to register, visit http://turf.cals.cornell.edu/news/safe-playing-fields-ipm-workshops/.

What now? Early spring sports field management

 

“Springtime is the land awakening. The March winds are the morning yawn.” – Quoted by Lewis Grizzard in Kathy Sue Loudermilk, I Love You

Spring is slowly unfurling. And in the spring a young man’s fancy lightly turns to thoughts of… turf maintenance. Photo: Joellen Lampman

The first athletic field question of the year has arrived – and it has to do with the Child Safe Playing Fields Act. (Since its full implementation in 2011, there are still many questions about the law. We tried to address some of the more common ones in a previous blog post.) This week’s question was in regards to fertilizer and if there were any restriction under the law.

The answer is no, although a combined fertilizer and pesticide product (often referred to as weed and feed) is covered under the Child Safe Playing Fields Act. Fertilizer use, however, does fall under the NYS Nutrient Runoff Law, which prohibits:

  • Applying fertilizer containing nitrogen, phosphorus, or potassium between December 1 and April 1 (Nassau and Suffolk County have their own local laws restricting application dates)
  • Applying fertilizer containing phosphorus unless you are establishing a new lawn or a soil test shows the need for phosphorus
  • Applying fertilizer within 20 feet of a water body (there are some caveats – see DEC website)
  • Leaving fertilizer on impervious surfaces such as sidewalks, parking lots, or driveways (fertilizer must be swept up, not washed off with water)

Thus ends the legal part of the blog.

And now on to why we would talk about fertilizer on a pest management blog. Healthy turfgrass is the best preventive against turf pests. Dense stands leave little room for weed seeds to germinate. Extensive roots can withstand some insect feeding without impacting turf quality. Proper fertilization provides your grass with the proper nutrients for growth and recovery.

 So what is the minimum that should be done now to produce pest resistant turfgrass on fields that are used year round?

Heavy spring fertilizer applications lead to excessive shoot and leaf growth and poor root growth. This leaves turf less likely to handle harsh summer conditions.

  • Fertilizing – After the turf greens up and ensuring that you are able to apply fertilizer legally (April 1st for most of NY), apply ½ pound of 50% water soluble nitrogen per 1,000 sq. ft. in April and ½ pound of 50% water soluble nitrogen or 100% organic nitrogen source in mid to late May. Note that spring applications are lighter than late summer and fall fertilization rates.
  • Mowing – If you haven’t already, sharpen those blades. Sharp blades reduces both injury to the turf blades as they are being cut and fuel usage. Once the grass is growing, mow as frequently as your schedule allows and as high as the sport allows. Mowing increases shoot density by increasing tillering (stems that develop from the crown of the parent plant). Dense turf leaves less room for weeds to propagate.
  • Overseeding -Seed perennial rye at 2 pounds per 1,000 sq. ft. weekly in high-use areas. With snow in the forecast, you may want to consider dormant overseeding now.

What if I can do more than the minimum?

  • Watering – According to the Northeast Drought Update, “27% of the Northeast in a drought and 20% of the region is abnormally dry”. Once it starts growing, turf needs about 1” of water per week. You can help determine irrigation need by referring to ForeCast: Weather for the Turf Industry Irrigation Information.
  • Fertilizing – Conduct a soil test to see if other nutrients are needed in addition to the nitrogen.
  • Cultivating – Concentrating on high-use areas, solid tine cultivate in multiple directions to maintain infiltration of air and water.

    The official Cornell Turfgrass twitter account will provide you with timely turf care information.

For more information on maintaining safe, functional athletic fields, visit http://safesportsfields.cals.cornell.edu. You will find different maintenance schedules based on number of seasons used and resources available, detailed information on different management practices, and information on “Duty of Care”, a legal obligation to a standard of reasonable care. For the most up-to-date information, follow the Cornell Turfgrass twitter account.


Managing Nuisance Geese Webinar – March 30th

Canada geese are protected by the Migratory Bird Treaty Act, but there are still things you can do to manage them. Harassing them (such as with dogs or lasers) does not need a permit. Interfering with their nest — such as addling their eggs — does. Photo: Joellen Lampman

Although beautiful in flight and valued as a symbol of the wild, Canada Geese frequenting school grounds, including athletic fields, are a growing concern. Please join us for a discussion about goose biology and behavior, the legal framework for dealing with goose problems, alleviation techniques available to schools, and the long-term management of geese and goose problems. For more information and to register for this New York State School Facilities Association event, visit http://nyssfa.com/sfmi-trainingevents/webinars.

Speakers:
♦ Lynn Braband, Sr. Extension Associate, NYS IPM Program
♦ Joellen Lampman, School and Turfgrass IPM Extension Support Specialist, NYS IPM Program

Online School IPM Resources to assist IPM Professionals with their Programs

Thank you to Janet Hurley, Texas A&M AgriLife Extension Service, for her dedicated effort to progress school IPM and for allowing us to use her post.

In 2014, a number of collaborating institutions led by Dawn Gouge, University of Arizona and Janet Hurley , Texas A&M AgriLife Extension received two separate grants from the Environmental Protection Agency (EPA) to provide online resources on integrated pest management (IPM) for school personnel. The Stop School Pests team used their grant to focus on education and training for personnel, while Hurley and collaborating scientists created a one-stop online “big box store” of IPM resources, including documents, training, pest ID pamphlets, state legislation and more.

stop-school-pests-urlThe training website, Stop School Pests, resulted from a collaboration of 42 people from federal and state agencies, universities, school districts, tribes, advocacy organizations and industry. Together they proposed to build a resource that would increase IPM adoption in K-12 schools and reduce the risks from pests and repeated pesticide use.

stop-school-pests-modulesStop School Pests provides modifiable PowerPoint presentations for in-class teaching and self-guided online courses. Lessons are specific to different roles within a school, so that facility staff will have access to materials specific to them.

While some groups, such as facility managers and maintenance personnel, were eager to delve into the materials, others such as nurses and teachers initially did not think the subject matter pertained to them. However, several who participated in some of the in-class lessons said that they did not realize how much they did not know about pest management and were glad that they took the lessons.

“I have been a school nurse for 25 years, and I cannot believe I learned so much helpful information in just one hour,” said Mary Griffin, a nurse in Arizona, after attending a training session piloting the Stop School Pests School Nurse Module.

A softball coach said that she did not realize that spraying pesticides without a license was illegal in her state until she went through the training.

For personnel who need specific information or don’t know where to turn once a pest problem starts, the iSchoolPestManager website provides over 1,000 resources, including the educational materials from the Stop School Pests project.

The iSchoolPestManager site was built as a searchable online mine of school IPM resources from every state. Staff from Texas A&M AgriLife spent several months collecting materials; then volunteers from throughout the country, even one from Israel, painstakingly combed through them to eradicate duplicates, outdated materials or references to materials that no longer existed. The initial 1,315 resources were pared down to 1,045 entries. Staff at the Pesticide Information Center in Oregon helped design and build the website. The website currently has 1,065 documents to assist everyone with adopting, maintaining, and sustaining their IPM program.stop-school-pests-website

Search for all sorts of documents by going to the show me everything tab.

The site is formatted for a standalone computer, with a separate link that will bring up special formatting for a smart phone or tablet. Resources are divided into four areas: geographically specific, professional trainings and other materials, insect-specific information, and groups of documents such as fact sheets, regulations, checklists and more.

Rather than duplicate information already provided at other websites, Hurley decided to link to them. For instance, self-paced instruction under “Training Modules” links to pages hosted by eXtension. Some of the PowerPoint presentations are located at Bugwood. Some of the educational links go to videos at university websites.

While the amount of information in iSchoolPestManager might seem overwhelming at first, users looking for specific information will be able to use the headings and sections to locate what they need more easily.

Additional information