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

Cornell’s Juliet Carroll Earns Excellence in IPM Award

Dr. Juliet Carroll, Fruit IPM Coordinator at Cornell University, earned the Excellence in Integrated Pest Management (IPM) Award from the New York State Integrated Pest Management Program (NYSIPM) at the Viticulture day of the B.E.V. (Business, Enology, Viticulture) conference in Rochester. The award honors individuals who encourage the adoption of IPM in their businesses, schools, communities, and farms, and who develop new tools and tactics for sharing these practices.

Dr. Carroll spearheaded the expansion of NEWA, a website and network that allows growers to understand how the weather will affect fungal and insect pests, and takes the guesswork out of their pest-management strategy. Carroll ran NEWA for over a decade. Under her leadership, NEWA went from 45 weather stations in New York State to over 500 in 12 states. Her work, along with Wayne Wilcox and Greg Loeb, on improving the user experience with the grape disease and grape berry moth models on NEWA, had an enormous impact on the implementation of grape IPM in New York.

Dr. Carroll also led the development of Trac software. Introduced in the early 2000s, the software simplified and digitized pesticide recordkeeping for large and small growers and processors alike. It allows farmers to input the information once, and generate customized reports for different processors. The software also includes reference to “IPM Elements” for grapes and other crops—a tool that helps growers assess their pest management practices.

Dr. Carroll built Trac software for five fruit crops, and partnered with a colleague to create TracTurfgrass for golf, lawns, sports fields and sod farms. Luke Haggerty, grower relations representative for Constellation Brands, calls Carroll’s TracGrape software “a true breakthrough” in recordkeeping. Of her work with NEWA, Haggerty says, “Julie has always been very proactive in developing and delivering the products needed for our growers to produce grapes in an environmentally and economically sustainable way.”

Tim Martinson, Cornell Cooperative Extension Viticulture specialist, noted, “IPM is built on information and decision-making tools. Juliet has built TracGrape and NEWA into useful, practical tools for growers.”

Dr. Carroll also co-edited organic production and IPM guides for grapes and several berry crops, and has regularly presented at Lake Erie Regional Grape Growers’ conferences and Coffee Pot meetings. She has conducted research on devastating pests, such as spotted wing drosophila (SWD), investigating whether hungry hummingbirds can provide meaningful control.

In addition, Dr. Carroll has chaired the Northeast IPM SWD working groups for the past decade, bringing research scientists, growers, industry reps, and extension educators from across the region together to help find solutions. Carroll has also helped fruit growers with bird management.

Learn more about integrated pest management at nysipm.cornell.edu.

SWD ALERT!

SWD ALERT!

Cornell has reported sustained SWD catches in several counties. Numbers are not high yet, but have been increasing. Be vigilant in your trap and fruit monitoring, weeding, and irrigation/drainage, and employ a spraying routine that works with your picking schedule. Follow this basic guide:

• Maintain an open canopy to increase sunlight and decrease humidity
• Eliminate weeds within rows to increase sunlight penetration and improve spray penetration into and deposition on the canopy
• Repair leaking drip lines and avoid overhead irrigation when possible. Allow the ground and mulch surface to dry before irrigating, and eliminate areas that encourage puddles.  
• If you’ve set your own traps, check them regularly—daily, if possible. Females usually arrive first, but males are quick to follow.   
• Check your fruit regularly. Pick groupings of 15-25 ripe fruit from different locations in your field, especially along the edges. Lightly squeeze each fruit. In a resealable bag, mix 1 cup salt and 1 gallon water. Add the fruit and mix well. After 30 minutes, check for small white larvae floating at the top. Repeat for each fruit grouping.
• Apply pesticides every 5 to 7 days; repeat if it rains.
• Rotate pesticides to prevent resistance.         

Visit Cornell's blog for detailed information on monitoring and growing best practices during SWD season. Download the university’s list of approved SWD insecticides here. 

The Berry Patch Pioneers Innovative Use of Exclusion Netting to Combat SWD

The Berry Patch Pioneers Innovative Use of Exclusion Netting

to Combat SWD

The Berry Patch, in tiny, rural Stephentown, has pioneered an innovative solution to spotted wing drosophila (SWD) infestation. Since it arrived in the United States in 2008, SWD has made it virtually impossible to grow commercially acceptable, pesticide-free raspberries and blueberries, but the Berry Patch’s experiments with exclusion netting seek to end crop losses.

Spotted wing drosophila is native to Southeast Asia. It first appeared in California in 2008, and spread to Florida the following year. By 2010, SWD had migrated to the Carolinas, Louisiana, Utah, Michigan, and Wisconsin. Northeastern fruit growers first went to battle with the insect in 2012, when an average of 80% of raspberry and 30% of blueberry crops—and approximately $4.3 million in revenue in NY state alone—were lost due to infestation of the fruit during its early ripening stages. Dale-Ila Riggs, co-owner of the Berry Patch and NYSBGA board chair, says, “This pest is a game-changer for berry growers nationwide. There are no natural enemies for it in the U.S.”

In 2012, Riggs lost about 40% of her lucrative blueberry crop to SWD. After observing some early research on the use of exclusion netting at Cornell University’s New York State Agricultural Experiment Station in Geneva, she obtained a Northeast Sustainable Agriculture Research and Education Farmer grant to test the use of the netting on her half-acre blueberry planting. Riggs adapted her existing bird-netting support system into a support system for the exclusion netting, with extra protections and anchoring to withstand thunderstorms, hail, and up to 60 mph winds. She then compared the fruits from the covered plot to the fruits grown in a control plot protected only with bird netting.

Berry Patch co-owner Dale-Ila Riggs adapted her existing bird netting structure to exclusion netting, with extra security features to help it withstand the volatile Northeastern climate.

The results were startling. Riggs documented an infestation rate of 0.7% and 0.3% in 2014 and 2015, and last year had a 0% infestation rate—a rate virtually unheard-of in agricultural systems.  Other farms around the country are taking notice, and have started to duplicate the Berry Patch’s successful growing system.

Riggs will set up her blueberry exclusion netting again in early July, prior to SWD’s summer activity. She also plans to experiment with the same exclusion netting for her high-tunnel raspberry planting for the first time this year. “With SWD, no one has been able to grow pesticide-free berries that are free from infestation,” Riggs notes. “The netting makes it possible. This is a highly effective method that brings new hope for growers.”