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2018 SWD distribution map, showing counties where traps were being monitored.

As of August 9, 2018, all 35 SWD trapping sites have sustained catch of SWD in the 23 counties in New York where monitoring was taking place. First trap catch across the New York State network spanned 72 days, from May 22 (Erie County) to August 2 (Herkimer County). All sites used the Scentry trap and lure.

This year brought fewer reports of severe infestations to my attention, than in 2017. It may have been the hot weather, the hot winds, the cold nights in spring, the drought. Although we saw early arrival of SWD in 2018, there wasn't the rapid, consistent build-up nor the early sustained catch as seen in 2017.

High pressure from SWD always builds in late summer. Those of us continuing to monitor SWD in berries are catching 100-200 SWD per trap in the week ending August 28. SWD is likely distributed across the state and soft, late-season fruits, such as fall raspberry, late blueberry varieties, plums, peaches, and pears may be at risk of infestation. To prevent fruit infestation now, if fruit is to remain hanging for weeks to come, susceptible fruit should be protected with an insecticide program.

Protect crops from SWD- (SWD hosts)

  • late-summer-ripening raspberry, blueberry, blackberry, elderberry
  • monitor for infestation in less susceptible fruits: ever-bearing strawberries, thin-skinned grapes, peaches, plums and prunes with salt flotation

Management tactics- (SWD management)

  • timely insecticide sprays (berries) (tree fruit and grapes)
  • rotate active ingredients—read and follow insecticide label directions.
  • weed management
  • canopy management
  • clean picking
  • remove or spray dropped fruit

Find out more about SWD on the Cornell Fruit Resources SWD pages.

Please join me in thanking those who contributed time and effort to the 2018 SWD trap network!

  • Amy Ivy, CCE Eastern NY Horticulture Program (Clinton and Essex County traps)
  • Bernie Armata, CCE Association of Herkimer County (Herkimer County traps)
  • Dave Thorp, CCE Association of Livingston County (Livingston County traps)
  • Don Gasiewicz, CCE Association of Wyoming County (Wyoming County traps)
  • Faruque Zaman, CCE Association of Suffolk County (Suffolk County traps)
  • Jim O’Connell, CCE Association of Ulster County (Ulster County traps)
  • Juliet CarrollNicole Mattoon and Ryan Parker, CCE NYS IPM Program (Cayuga, Onondaga, Schuyler and Wayne County traps)
  • Laura McDermott and Natasha Field, CCE Eastern NY Horticulture Program (Albany, Columbia, Rensselaer, Saratoga, Schenectady and Washington County traps)
  • Peter Jentsch and Zayd Normand, Hudson Valley Laboratory (Dutchess and Ulster County traps)
  • Sharon Bachman, CCE Association of Erie County (Erie County traps)
  • Shona Ort, CCE Association of Chemung County (Chemung County traps)
  • Tess Grasswitz, CCE Lake Ontario Fruit Program (Niagara and Orleans traps)


This Wednesday! "Using Hummingbirds to Help Control SWD" — a twilight meeting in Salem, NY hosted by Laura McDermott, Eastern NY Commercial Horticulture Program (ENYCHP). Biological and cultural controls of SWD are possible! Now that SWD numbers are increasing, every tactic used will help protect your late season berries.

Come learn about ongoing research into encouraging hummingbird predation on SWD adults. Dr. Juliet Carroll of Cornell NYS IPM will also discuss new research into better thresholds for monitoring SWD and how those thresholds will more accurately inform spray decisions. Managing crop canopy and weeds are also critical for SWD control.

If you don't want to spray, ENYCHP will have current information on exclusion netting work over berries, so you can plan to cover your crop next year.

Hummingbirds eat lots of small insects, including aphids and fruit flies, to supplement their nectar-rich diet. Up to 2000 per day!

DEC Credits Pending.

Wednesday, August 22, 2018
5:00 to 7:00 PM

Gardenworks Farm
1055 County Rte 30
Salem, NY 12865

COST:  Free and Open to the public

Please Register online at:
Or call Abby Henderson at 518-746-2553

More about hummingbirds is in the Hummingbirds SWD blog post.

As expected this late into the summer season, SWD was caught a second week in a row at a blueberry farm in Herkimer County.  7 males were caught in the traps set in and around the blueberry field, during the week ending August 9, 2018. These traps are being monitored by Bernie Armata, Herkimer County Cornell Cooperative Extension.

Checking fruit for larva with salt flotation at a workshop on SWD sponsored by the NYS Berry Growers Association.

The grower has continued monitoring for fruit infestation using salt flotation. Harvest is winding down and the farm will be closing in a few days.

If you need more information about SWD, consult the web pages listed below on Cornell Fruit Resources,, under Berry Integrated Pest Management, New and Emerging Pest Issues in Berries:

  • SWD monitoring, – describes what you can do.
  • SWD management, – describes what you should do.
  • SWD distribution, – describes where the CCE network is finding it.

Blueberry harvest is underway at a farm in Herkimer County and SWD hadn't been found. But that changed as of Thursday! Two male SWD were caught, one in each of two traps set within the planting, during the week ending Thursday, August 2, 2018. Two traps set on the edge of the planting caught zero SWD.

Only one County in Cornell's SWD Network hasn't caught SWD. SWD populations continue to build through summer and into fall, placing fruit at extreme risk.

This grower will collect a fruit sample now and test it via salt flotation to see if there is an infestation. You can do this, too! Now is the time to be checking your fruit, because SWD has been found at all but one location in the New York State SWD Network. Monitor for SWD. Protect ripe and ripening fruit crops from infestation.

Herkimer County traps are being monitored by Bernie Armata, Herkimer County Cornell Cooperative Extension.

Ticks don’t really care where you are farming so we are hoping to keep all our growers safe from tick borne diseases.

If you have not already, please take this short survey:

The blacklegged tick will search for hosts typically below adult knee-height by holding onto vegetation with their back legs while holding their front legs out as hosts pass by — a behavior known as questing. Photo: J. Lampman, NYS IPM

The Community IPM Program (part of NYSIPM) was funded by the NY State Senate Task Force on Lyme and Tick Borne Disease to create an educational campaign about the risks of tick exposure and tick awareness for New York.

Community IPM addresses non-agricultural pest issues for every New York resident, including farmers. This survey is a research project to help us understand what tick issues and concerns NY farmers are facing on their farms and home properties.

By completing this survey you are agreeing to participate in this research. Your answers are completely anonymous and will help us understand how serious the issue is and how to raise awareness with the farming community.

Please fill out the survey (just 10 questions!) here:

For more information about this survey or about ticks and tick prevention or control, please contact Jody Gangloff-Kaufmann at

Thank you!

Both sites in Chemung County are now at sustained catch. During the week ending July 27, 2018, 4 males were caught at one site with a raspberry and a blueberry planting, and 6 males and 2 females were caught at the other site in a blueberry planting. These sites are being monitored by Shona Ort, Chemung County Cornell Cooperative Extension.

Insecticide programs are in place now, which will suppress SWD population growth within the planting. In unmanaged locations, SWD numbers will continue increasing as approximately 10 generations of the insect develop during summer and early fall. A recap:

  • SWD monitoring, – describes what you can do.
  • SWD management, – describes what you should do.
  • SWD distribution, – describes where the CCE network is finding it.

Remember, the short life cycle and 10+ generations per year will make for high pressure situations in a few weeks’ time. Management, management, management…

Why does the SWD population explode?
You can do the math. Let’s think optimum conditions for SWD development. A single female can lay around 350 eggs during her lifetime, about 15 per day. The egg to adult phase of the life cycle takes as little as 6 days. So, one female in one day can result in 15 more adults 6 days later, and, during those 6 days, she will have laid another 90 eggs. 6 days after that, those 90 eggs will all be adults. Half of the 105 adults will be females, capable of laying ~350 eggs during their lifetimes…that’s 18,375 eggs or 9,187 females in about two weeks.

Meet and greet - male (right) and female (left) SWD - on a raspberry fruit.

A typical life span for SWD is 3 to 9 weeks and there are estimated to be about 10 generations per year in the US, depending on climate. Back to the one female. Let's say that she lays 70 eggs per week and, when she dies in 5 weeks she's laid 350 eggs and, by then, about 280 of those are adults. Half of those adults, 140, are females and, by then, have laid 49,000 eggs, 29,400 of which will, by then, be adults. Half of those adults, 14,700 are females and, by then, have laid 3,087,000 eggs ...I'm lost and I probably made a mistake...but you get the idea - over 3 MILLION in five weeks from ONE (really from two, because you need a male and a female).

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