Confirmed sustained catch occurred in Cayuga County on July 3, 2017 in ripe summer raspberries. 4 SWD were caught in 4 traps, 2 females in traps set within the planting and 1 female and 1 male in traps set on the crop edge. These traps are being monitored by Nicole Mattoon, IPM field technician, and Taylere Herrmann, IPM summer technician, with my fruit IPM program in the NYS IPM Program.
If your berries are ripe and SWD is being caught in your area, it is time to begin management tactics to protect the crop.
2 SWD females were caught on July 3, 2017 in a raspberry planting, 1 in a trap set within the planting and 1 in a trap set on the edge of the planting. These traps are being serviced by Jan Beglinger, extension educator, Genesee County Cornell Cooperative Extension. Insect identification is being done in by Nicole Mattoon, IPM field technician, and Taylere Herrmann, IPM summer technician, NYS IPM Program.
If your berries are ripe and SWD is being caught in your area, it is time to begin management tactics to protect the crop.
One female SWD was confirmed caught in a trap set within a raspberry and blueberry planting on June 22, 2017 and the trap set on the edge of the crops had 1 female and 3 male SWD.
A female spotted wing drosophila (SWD) showing her serrated ovipositor in the inset.
Another 3 females were confirmed caught on June 28th at this same location in Erie County.
These traps are being monitored by Sharon Bachman, extension educator, Erie County Cornell Cooperative Extension.
Two male SWD were caught in a trap set on the edge of a blueberry planting on June 27, 2017 in Steuben County. The blueberries at this site are mostly green, but beginning to ripen. Traps at this site are being monitored by Stephanie Mehlenbacher, extension educator with Steuben County Cornell Cooperative Extension.
Unripe blueberry fruit is too hard for SWD to lay eggs in and doesn't warrant treatment with insecticide.
It will be important to take steps to manage SWD in your berry crops this year. Here are some resources:
Sustained catch (two weeks in a row catching SWD) was reported on June 26 and 27, 2017, in several counties: Albany, Rennselaer, Saratoga, Schuyler and Washington. Reports have come in from Annie Mills, field technician with Laura McDermott and the Eastern NY Commercial Horticulture Program and from Taylere Herrmann and Nicole Mattoon with me in the NYS IPM Program.
Specific findings:
Albany County - 10% ripe summer raspberries at the site and 52 SWD caught in 4 of 4 traps.
Rensselaer County - 31 SWD caught at this site in 3 of 4 traps.
Saratoga County - blackberries are still unripe at this site, but nearby sweet cherries are coloring up. 2 female SWD caught.
Schuyler County - summer raspberries are ripe at this site and 4 SWD caught in 3 of 4 traps set in that crop. At this farm, first catch also was found in the traps set in blueberries - 4 SWD females caught in 3 of 4 traps.
Washington County - most blueberries at this site are still just starting to color, but one variety is at about 25% blue. 15 SWD caught in 3 of 4 traps.
Two female SWD were caught in a summer raspberry planting on June 26, 2017, one each in a trap set on the edge and a trap set within the planting. About 40% of the fruit at this location is showing color and ripe for picking.
Meet and greet - female (left) and male (right) SWD - on a raspberry fruit.
These traps are being monitored by Nicole Mattoon and Taylere Herrmann, NYS IPM Program field and summer technicians, respectively.
At this location, given the crop is ripe and ripening and the finding of SWD, it is time to begin to protect the crop with insecticides.
At two monitoring sites in Ulster County, SWD was caught in the week ending June 21, 2017. In summer raspberry at one site, 6 SWD (4 females and 2 males) were caught in two traps within the crop and 7 SWD (5 females and two males) were caught in two traps on the edge of the planting — total 13 SWD.
Four female SWD, as seen through a dissecting microscope, that were caught in a Scentry trap. The inset in the middle is a close-up of the females ovipositor.
The other site is small and the four traps are distributed between raspberry and blueberry. Interestingly, SWD weren't caught in the traps set in the blueberries, while in the summer raspberries 18 SWD were caught. 5 females and 2 males in two traps within the crop and 9 females and 2 males in two traps on the crop edge.
This report comes from Jim O'Connell, extension educator, Ulster County Cornell Cooperative Extension.
With reports of sustained catch and double digit SWD being caught in summer raspberry locations, it is crucial to plan your SWD management tactics for the raspberry season and, if raspberries are ripe, begin to protect fruit with insecticides.
Many reports are also being updated to the NY State distribution map, hosted by the Eastern Spotted Wing Drosophila Volunteer Monitoring System, The University of Georgia - Center for Invasive Species and Ecosystem Health. Please note - Suffolk County, Long Island has caught SWD, though the map indicates gray (as of June 27, 2017). All other NY Counties showing gray have not yet caught SWD.
At two sites in Tioga County, SWD has been caught two weeks in a row as of June 20, 2017, indicating established populations. Numbers caught are still low. Four SWD, 1 female and 3 males, in one trap set outside a high tunnel of raspberries. Three SWD, 2 female and 1 male, in one trap set on the edge of an open-grown raspberry planting.
Tiny threads of the SWD egg breathing tubes indicate where an egg was laid in a raspberry.
These traps are being maintained by Margaret Ball, extension educator, Tioga County Cornell Cooperative Extension. The insects caught are being sorted and identified by Nicole Mattoon and Taylere Herrmann in my fruit IPM program.
Six female SWD were caught in traps checked on June 21, 2017 set in a raspberry planting in Wayne County. There are some ripe fruit present in the planting at this time. These traps are being monitored by Nicole Mattoon, field technician, and Taylere Herrmann, summer technician, with Juliet Carroll's program, NYS IPM Program, Cornell Cooperative Extension.
The impact of SWD infestation on raspberry fruit in late summer can be severe. Get this fruit out of your planting to reduce SWD population build up.
It is looking like it may prove to be an early and challenging year for managing SWD in berry crops, with summer raspberries at risk. Please review SWD management guidelines and read through the SWD blog, Protecting crops from SWD infestation.
Three female and one male SWD were caught the week ending June 23, 2017 in two traps set on the edge of a blueberry planting in Rensselaer County. The two traps set within the crop did not catch SWD. The blueberries are not yet ripe, though the 'Duke' are about 10 days from picking.
This information is from Annie Mills, field technician, and Laura McDermott, extension educator, with the Eastern NY Commercial Horticulture Program, Cornell Cooperative Extension.
Checking SWD specimens with hand lens at the Albany workshop.
