Once the fruit is infested, cold storage for 3 days at 33F will kill the
majority of larva in the fruit, retaining the integrity of fruit at the time of
harvest from further injury.
* If the fruit are clean (uninfested) at the time of application AND the
material has a high degree of efficacy in reducing SWD egg laying, the fruit
will remain clean.
* If the fruit has been newly infested with one or more eggs you may get
some efficacy from the application to reduce larval activity, with protection
from further infestation in the field depending on insecticide efficacy. Its
likely they will remain infested with larval activity increasing in storage
unless cold treated.
* Sound stone fruit are much less likely to be infested. We have only
reared a singly fly from sound peach. We have seen oviposition on plum with no
fly emergence. Blueberry have shown to be much less attractive to SWD then
raspberry and blackberry. A 7 day schedule for blueberry using the best
materials has been shown to be effective at managing the pest on many farms
with consistent pest management programming. In the Hudson Valley a 3d program
is required in raspberry and blackberry for commercial quality fruit.
Peter J. Jentsch
Hudson Valley Laboratory Superintendent
Senior Extension Associate - Entomology
Department of Entomology, Cornell University
Hudson Valley Research Lab
P.O. Box 727, 3357 Rt. 9W
Highland, NY 12528
<apple-crop-boun...@virtualorchard.net> on behalf of Arthur Kelly
Sent: Friday, August 21, 2015 7:36 PM
Subject: [apple-crop] SWD
If you apply a 3 day PHI spray for SWD will it continue to protect the fruit in
the packing room or retail stand? I'm thinking of peaches or plums and
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