In an orchard of sweet and tart cherry trees, first catch of a single, male SWD was obtained on June 21, 2021. Sweet cherry harvest has begun and, therefore, fruit are susceptible to infestation by SWD. The Michigan State University (MSU) degree day model can be used to clock cherry fruit susceptibility to SWD.
Plan your SWD management strategy:
- Plan insecticide use so you have materials with lower PHI for use close to harvest.
- Rotate active ingredients (IRAC groups) through to harvest for resistance management.
- Choose CFF/BCFF/ECFF insecticides that have activity against SWD.
- Don’t stretch spray intervals, 7 day interval max.
- Achieve thorough coverage.
- If it rains, reapply (according to label).
- Mow the row middles.
- Prune to open the canopy to sunlight.
- Read and follow label recommendations.
The stone fruit insecticide quick guide is updated now for 2021, www.hort.cornell.edu/fruit/pdfs/swd/treefruit-grape-insecticides.pdf. Find it on the Cornell Fruit Resources SWD Management page, fruit.cornell.edu/spottedwing/management/.
Traps at this location are being monitored by Natasha Field, Eastern NY Commercial Horticulture Program, CCE. Natasha is also entering all the data for the ENYCHP SWD trap network in eight counties.