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First catch was obtained on July 8, 2019 in Herkimer County. Nine SWD — 3 females and 6 males, distributed both within and on the edge of the planting. Numbers of SWD being caught are starting to escalate.

Photo of a male SWD on a blueberry.
A male spotted wing drosophila (SWD) on blueberry; another likely SWD is in the background.

It's time to get an insecticide program geared up for ripening and ripe fruit. This season will be demanding and all tactics should be brought to bear on SWD to keep it in check!

Refer to the quick reference guides for:

Other tactics that can help are:

  1. Sanitation – pick off and remove all cull fruit from the planting.
  2. Mowing – keep the environment hot, sunny, and dry.
  3. Weed management – keep the environment hot, sunny and dry, and provide no alternate hosts.
  4. Pruning – keep the environment hot, sunny, and dry, and improve spray penetration and deposition.
  5. Cold storage – immediately after harvest, place harvested fruit into a cooler at 32°-34° F and hold it there, to kill larvae and eggs, until sold.

Trent Davis, Dyson School of Applied Economics and Management, and the New York State Berry Growers Association (NYSBGA) want your feedback (Cornell-NYSBGA-Labor-Survey http://bit.ly/Cornell-NYSBGA-Labor-Survey ) on labor and wage rates in berry production. The information you provide will be used to better understand what an increase in the New York State minimum wage rate from the current $11.10/hr to $15.00/hr will have on berry production in New York.

Results will be used to let the New York State government comprehend the direct impacts farmers will face with a minimum wage increase of this magnitude. Our survey is meant specifically for farmers who produce blueberries, strawberries, or raspberries.

Access the Cornell-NYSBGA-Labor-Survey here: http://bit.ly/Cornell-NYSBGA-Labor-Survey

Picture showing a field crew harvesting strawberries.
Field crew harvesting strawberries.

We need to know — for 2018 — about how long certain berry production practices take, the compensation those working on these practices receive, the types of employment utilized on your farm, and potential future changes you plan for your farm.

You don't need to be a member of NYSBGA to take the survey! The more respondents the better!

The survey will take roughly 7-10 minutes. We suggest before starting the survey that you gather, or think about, the hourly wage rates you paid berry production workers in 2018.

Please complete the survey by Friday, July 12thClick this link to access the survey. Thank you so much for your participation!

http://bit.ly/Cornell-NYSBGA-Labor-Survey

If you have any questions or concerns feel free to email me!

Trent J. Davis, tjd233@cornell.edu 

M.S. Graduate Research Assistant
Applied Economics and Management - Development Economics
Charles H. Dyson School of Applied Economics and Management
Cornell University, Ithaca, NY

One female SWD was caught in two traps placed in a small raspberry patch in Livingston County. Traps were checked on July 3, 2019 by Dave Thorp, CCE Association of Livingston County.

Only four counties in the network, two added just last month, have not yet caught SWD — Herkimer, Onondaga, Orleans, and Tioga. All these counties have traps set in blueberry fields. In Orleans a second site has traps set in raspberry.

Picture of a Scentry trap for monitoring SWD that is set in a raspberry planting.
Scentry trap for SWD set in a raspberry patch.

Fruit that is ripe is at risk of infestation. Consult Cornell Fruit Resources SWD Management, fruit.cornell.edu/spottedwing/management/.

More information on SWD is online:

Review the Quick Guide to SWD Insecticides at

www.hort.cornell.edu/fruit/pdfs/swd/berry-insecticides.pdf for berries

www.hort.cornell.edu/fruit/pdfs/swd/berry-insecticides.pdf for stone fruit and grapes

 

32 SWD were caught in four traps set on the edge of and within a tart cherry orchard in Columbia County. Fruit is ripe in the orchard. These traps, checked on July 1, 2019, are being monitored by Natasha Field, Cornell Cooperative Extension Eastern NY Commercial Horticulture Program.

A trap to monitor SWD set in a tart cherry tree.
Scentry SWD trap set in a tart cherry. Fruit are coloring and will soon be ripe for harvest. When ripening and ripe, cherries can be infested by SWD.

Numbers caught in traps, especially in Eastern NY, are climbing, with totals in the double and triple digits. Typically, we don’t see numbers climb up this rapidly in the SWD trap monitoring network. Fruit that is ripe is at risk of infestation. Consult Cornell Fruit Resources SWD Management, fruit.cornell.edu/spottedwing/management/.

Things to consider regarding insecticide programs for SWD, with specific emphasis on materials registered for cherries:

  • Population growth models for SWD theoretically calculate that using the most efficacious insecticide first will more successfully lower SWD numbers by knocking the population back to close to zero and delaying population growth. (This is strikingly similar to classic tactics in plant disease epidemiology – think knocking back primary apple scab infections.)
  • Insecticides with probable excellent efficacy include – Exirel (3 days), Minecto Pro (21 days), Danitol 2.4EC (3 days), Mustang Maxx (14 days), and Imidan 70W (7 days). Of these, choose first those with the longest pre-harvest interval (given in parentheses) that you can accommodate; some may be out of the question at this point. (Remember – Imidan can’t be used on sweet cherry.) Rotate to other insecticides with shorter pre-harvest interval for later in the season, closer to harvest.
  • Research on berries has shown Mustang Maxx isn’t very rain fast, so plan to re-cover if significant rain occurs during the spray interval.
  • Rotate use among insecticides with different IRAC groups to reduce selection pressure for resistant populations of SWD. (In a Finger Lakes vineyard last year, insecticide-resistant Drosophila melanogaster (SWD = D. suzukii) were identified. D. melanogaster is targeted with insecticide for controlling sour rot in grapes.)
  • For the second insecticide application, switch to a product with Good to Excellent or Moderate efficacy – Entrust 80WP (7 days), Entrust 2SC (7 days), Delegate (7 days), Asana XL (14 days), Lambda-Cy EC (14 days).
  • The spray interval column in the Insecticide Quick Reference Guide table relates to use of the same product back-to-back. When switching to another mode of action, weekly applications are OK and are suggested against SWD.
  • Don’t stretch intervals between sprays more than about seven days.
  • Make sure you are getting excellent coverage. Spray every row (no alternate row spraying.)

Review the Quick Guide to SWD Insecticides at

www.hort.cornell.edu/fruit/pdfs/swd/berry-insecticides.pdf for berries

www.hort.cornell.edu/fruit/pdfs/swd/berry-insecticides.pdf for stone fruit and grapes

Sustained SWD catch in Eastern NY with some site totals in the double to triple digits — the Capital District, Mohawk Valley, and Champlain Valley. Berries are being harvested and will continue ripening over the next several weeks. This will create an SWD paradise for fruit infestation.

Farms with trap catch in the double to triple digits should sample fruit and do a salt flotation test to assess fruit infestation. Methods described in Guidelines for Checking Fruit for SWD Larvae in the Field by Laura McDermott, available on Cornell Fruit Resources SWD pages.

It's time to pay attention to SWD and protect ripe and ripening fruit crops from infestation with an insecticide program.

Details about each County's sustained catch:

  • Essex: 7/2/2019, 22 females & 9 males, blueberrytotal 31
  • Montgomery: 7/1/2019, 40 females & 24 males, raspberrytotal 65
  • Rensselaer: 7/2/2019, 1 female & 2 males, blueberry – total 3
  • Schoharie: 7/1/2019, 67 females & 44 males, raspberrytotal 111
  • Washington: 6/24/2019, 4 females, blueberry – total 4
Photo of a female SWD on a raspberry.
Female SWD laying eggs in a raspberry.

Re-set raspberry and blackberry fields:
Because raspberry and blackberry continue to flower and set fruit over a protracted period of time, it is possible and advisable to “re-set” the field. When fruit infestation is found via salt flotation or high numbers of SWD are caught in traps in the field, clean pick all ripe and cull fruit. Remove this fruit from the planting and solarize it or freeze it to kill SWD. Solarize in sealed, clear plastic bags set in the sun. After clean picking, spray insecticide. Choose a material with excellent efficacy against SWD and an appropriate days-to-harvest interval.

See insecticide quick guides online:

SWD Insecticides for Berries, www.hort.cornell.edu/fruit/pdfs/swd/berry-insecticides.pdf

SWD Insecticides for Stone Fruit & Grapes, www.hort.cornell.edu/fruit/pdfs/swd/treefruit-grape-insecticides.pdf

More information on SWD is online:

Thank you for monitoring SWD in the Counties with sustained catch!

  • Andy Galimberti, CCE Eastern NY Commercial Horticulture Program (Essex County)
  • Natasha Field, CCE Eastern NY Commercial Horticulture Program (Montgomery and Schoharie Counties)
  • Crystal Stewart, CCE Eastern NY Commercial Horticulture Program (Montgomery and Schoharie Counties)
  • Laura McDermott, CCE Eastern NY Commercial Horticulture Program (Rensselaer and Washington Counties)

Three female SWD were caught in traps set on the edge of and within a blueberry planting in Clinton County. These traps, checked on July 2, 2019, are being monitored by Andy Galimberti, Cornell Cooperative Extension Eastern NY Commercial Horticulture Program.

SWD distribution map for NY, July 4, 2019.
SWD distribution map for New York shows the counties where SWD has been reported found, as of July 4, 2019. Counties in white don't have traps or reports in, those in gray have zero catch.

About 85% of the counties in the CCE SWD Monitoring Network have caught SWD in traps. Two more counties have been added to the network in recent weeks – Herkimer and Tioga.

Numbers caught in traps, especially in Eastern NY are starting to climb, with totals in the double and triple digits. Fruit is ripe and will continue ripening over the next several weeks and be at risk of infestation.

Consult Cornell Fruit Resources SWD Management, fruit.cornell.edu/spottedwing/management/.

Plan your insecticide program.

  • SWD population growth models theoretically calculate that using the most efficacious insecticide first will more efficiently lower SWD numbers by knocking the population back to close to zero and delaying population growth.
  • Review the Quick Guide to SWD Insecticides online at:

www.hort.cornell.edu/fruit/pdfs/swd/berry-insecticides.pdf for berries

www.hort.cornell.edu/fruit/pdfs/swd/treefruit-grape-insecticides.pdf for stone fruit and grapes

  • Rotate use among insecticides with different IRAC groups to reduce selection pressure for resistant populations of SWD.

For two weeks in a row, June 25 (2 males and 1 female) and July 2, 2019 (1 female and 1 male), SWD has been caught in raspberry in Niagara County. Traps are being monitored by Liz Tee, Cornell Cooperative Extension Lake Ontario Commercial Fruit Program.

Once SWD is found on the farm and fruit are ripe, protect the crop with insecticide sprays. Refer to the quick reference guides for:

SWD Insecticides for Berries, www.hort.cornell.edu/fruit/pdfs/swd/berry-insecticides.pdf

SWD Insecticides for Stone Fruit & Grapes, www.hort.cornell.edu/fruit/pdfs/swd/treefruit-grape-insecticides.pdf

A grower checks a blueberry fruit sample for SWD larvae using salt flotation.
Checking fruit for larva with salt flotation at the Albany workshop.

Monitor fruit for infestation by SWD using salt flotation. Methods described in Guidelines for Checking Fruit for SWD Larvae in the Field by Laura McDermott, available on Cornell Fruit Resources, SWD pages, fruit.cornell.edu/spottedwing/.

Other management tactics that can help are:

  • Sanitation – pick off and remove all cull fruit from the planting.
  • Mowing – keep the environment hot, sunny, and dry.
  • Weed management – keep the environment hot, sunny and dry, and provide no alternate hosts.
  • Pruning – keep the environment hot, sunny, and dry, and improve spray penetration and deposition.
  • Cold storage – place harvested fruit into a cooler at 32°-34° F ASAP and hold it there to kill larvae and eggs. Berries can tolerate 32° F storage conditions.

For two weeks in a row, SWD has been caught on berry farms in Cayuga and Schuyler Counties. Traps were checked on June 27, 2019 by Ryan Parker, Cornell Cooperative Extension NYS IPM Program. The Schuyler County site is a blueberry farm where fruit are still green and hard — not susceptible — only one female was caught there, in a trap set on the edge of the planting. In Cayuga County about 1% of the raspberries are ripe for picking, and 2 females and 1 male were caught in a trap set within the planting.

Picture of a Scentry trap for monitoring SWD that is set in a raspberry planting.
Scentry trap for SWD set in a raspberry patch.

Once SWD is found on the farm and fruit are ripe, it is important to protect the crop with insecticide sprays. Refer to the quick reference guides for:

Other tactics that can help are:

  1. Sanitation – pick off and remove all cull fruit from the planting.
  2. Mowing – keep the environment hot, sunny, and dry.
  3. Weed management – keep the environment hot, sunny and dry, and provide no alternate hosts.
  4. Pruning – keep the environment hot, sunny, and dry, and improve spray penetration and deposition.
  5. Cold storage – immediately after harvest, place harvested fruit into a cooler at 32°-34° F and hold it there, to kill larvae and eggs, until sold.

SWD numbers caught in traps, especially in Long Island, the Hudson Valley, and the Capital District are starting to climb up with totals nearing double digits. And, just in, first trap catch on June 27, 2019 at one of three sites in Schuyler County, Finger Lakes, totaled 10 females in a raspberry planting that has 10-20% ripe fruit. Ripening fruit will be at risk of infestation. It's time to pay attention to SWD and protect ripe and ripening fruit crops from infestation.

Details about each County's sustained catch:

  • Suffolk: 6/20/2019, 5 females & 3 males, blueberry – total 8
  • Suffolk: 6/27/2019, 6 females & 4 males, raspberry – total 10
  • Saratoga: 6/27/2019, 5 females & 1 male, blackberry – total 6
  • Schenectady: 6/27/2019, 4 females & 3 males, blueberry – total 7

Thank you for monitoring SWD in the Counties with sustained catch!

  • Faruque Zaman, Suffolk County Cornell Cooperative Extension (CCE) and Long Island Horticultural Research & Extension Laboratory
  • Natasha Field and Laura McDermott, CCE Eastern NY Commercial Horticulture Program (Saratoga and Schenectady Counties)

Two female SWD were caught in traps set on the edge of a raspberry planting in Essex County. These traps, checked on June 26, 2019, are being monitored by Andy Galimberti, Cornell Cooperative Extension Eastern NY Commercial Horticulture Program.

SWD distribution map for NY, June 27, 2019.
SWD distribution map for New York shows the counties where SWD has been reported found, as of June 27, 2019. Counties in white don't have traps or reports in, those in gray have zero catch.

Only six of the 25 counties in the CCE SWD Monitoring Network haven’t found SWD in traps yet. Numbers caught in traps are starting to climb up with totals nearing double digits, especially in Long Island, the Hudson Valley, and the Capital District. Fruit will be ripening over the next several weeks and then be at risk of infestation. Strawberry harvest is underway. Sweet cherries will soon be ripe.

Consult Cornell Fruit Resources SWD Management, http://fruit.cornell.edu/spottedwing/management/.

Quick Guides to SWD Insecticides are at

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