Spotted Wing Drosophila First Trap Catch in Some ENY Counties This Week

Photo by Katja Schulz, CC BY 4.0 <https://creativecommons.org/licenses/by/4.0>, via Wikimedia Commons

By Mike Basedow, CCE-ENYCHP, Eastern New York

Spotted wing drosophila first trap catch is showing up in a handful of ENY counties this week. Counties reporting first catch in our region include Columbia County, Rensselaer county, Saratoga County, Washington County, and Essex County. Cherries and peaches will be at risk once they’ve begun to blush or soften. Spotted wing can be managed using a combination of cultural and chemical practices. You will need to be diligent.

Excellent sanitation will reduce SWD populations. Fruit should be harvested frequently and completely to prevent the buildup of ripe and over-ripe fruit. Unmarketable fruit should be removed from the field and either frozen, “baked” in clear plastic bags placed in the sun, or disposed of in bags off-site. This will kill larvae, remove them from your crop, and prevent them from emerging as adults.

Cool fruit immediately. Chilling immediately after harvest to 32° – 34° F will slow or stop the development of larvae and eggs in the fruit. U-Pick customers should be encouraged to refrigerate fruit immediately to maintain fruit quality at home.

An open canopy will make the environment less favorable. Prune to maintain an open canopy, increase sunlight and reduce humidity. This will make plantings less attractive to SWD and will improve spray coverage. Repair leaking drip lines and avoid overhead irrigation when possible. Allow the ground to dry before irrigating.

Insecticide sprays will kill SWD adults and thereby reduce egg laying. Insecticide treatments should begin at first SWD trap catch when highly susceptible fruit crops begin ripening. Insecticides should be re-applied at least every seven days and more often in the event of rain. Choose the most effective insecticides with pre-harvest intervals that work for your picking schedule. Rotate insecticides according to their modes of action. The spray guide quick sheets for SWD can be found here.

You can also learn more about regional monitoring efforts for spotted wing, as well as tips for management of this pest, on the NYS IPM SWD webpage.

2021 Berry Production Workshop

September 15, 2021, Kennedy
October 5, STEPHENTOWN
4:00pm-6:00pm

2021 season review of SWD management techniques
Free; register here.

Note: Due to severe weather, the Stephentown workshop was postponed until October 5. Sign up using the link above, then join us at The Berry Patch, 15589 State Rt. 22, Stephentown.

Join researchers, growers, and expert speakers for a two-hour review of Spotted Wing Drosophila (SWD) management techniques. We’ll cover the basics of SWD monitoring of adult and larvae populations and also discuss implementing a pesticide program.

This free program will focus on what has been learned about designing an exclusion netting support system that provides long-term control of SWD and maximum utility for berry farmers.

Exclusion netting is being used on field blueberries where it controls SWD while also excluding birds and moderating impacts of hail and heavy rain. Raspberries and strawberries also benefit from exclusion netting on the sides of high tunnels.

1.5 DEC credits available in categories 1A, 10, and 22.

AGENDA - STEPHENTOWN

4:00 pm | Welcome, Introductions & NYS DEC credit sign-up – Laura McDermott, CCE ENYCHP

4:05 pm | Brief Overview of SWD – Laura McDermott, CCE ENYCHP . Insect monitoring, fruit infestation monitoring, insecticide management and cultural management techniques will be discussed.

4:20 pm | Overview of Exclusion Netting – Dale Ila Riggs, The Berry Patch, and Ted Storozum, TekKnit, Quebec. Brief review of work undertaken and effectiveness of netting in open field and high tunnel systems. Discussion of adaptations made to netting material and the need for structural design.

4:50 pm | Structural Considerations When Installing Exclusion Netting – Chris Callahan, University of Vermont, and Paul Lucas, Gintec, Ontario, CA. The past two seasons has provided lots of new information about designing the support structure for Exclusion Netting. Gintec owner Paul Lucas has played a critical advisory role in this portion of the project and has decades of experience with protected agriculture systems. Cost information for the SWD exclusion netting and structure will be included. 

5:20 pm | Exclusion Netting on Fall Raspberries – Dale Ila Riggs, The Berry Patch. Research on using field netting for fall raspberries and incorporating it into a high tunnel system.

5:30 pm | Views from Other Growers – TBD. Growers that have adopted exclusion netting will share their successes and struggles with the netting. 

5:45 pm | Hands-On Removal of Netting – Attendees will watch and assist with removal of netting panels to better understand the requirements and ease of using netting. Netting storage and winter care will be discussed.

6:00 pm | Adjourn

AGENDA - KENNEDY

4:00 pm | Welcome and Introductions & NYS DEC credit sign-up – Anya Osatuke, CCE Harvest NY.

4:05 pm | Brief Overview of SWD – Greg Loeb, Cornell University. Insect monitoring, fruit infestation monitoring, insecticide management and cultural management techniques will be discussed

4:20 pm | Overview of Exclusion Netting – Greg Loeb and Stephen Hesler, Cornell University. Brief review of work undertaken and effectiveness of netting in open field and high tunnel systems. Discussion of adaptations made to netting material and the need for structural design.

4:50 pm | Structural Considerations when Installing Exclusion Netting – Stephen Hesler, Cornell University, and John Abers, Abers Acres. The past two seasons has provided lots of new information about designing the support structure for Exclusion Netting, but every farm is unique and Abers Acres owner will discuss how they installed the netting. Cost information about the SWD exclusion netting and structure will be included. 

5:20 pm  |  Exclusion Netting on Fall Raspberries – Greg Loeb, Cornell University. Research on using field netting for fall raspberries and incorporating it into a high tunnel system.

5:30 pm | Views from Other Growers – TBD. Growers that have adopted exclusion netting will share their successes and struggles with the netting. 

5:45 pm | Hands-On Removal of Netting – Attendees will watch and assist with removal of netting panels to better understand the requirements and ease of using netting. Netting storage and winter care will be discussed.

6:00 pm | Adjourn