Here is the newest issue of Massachusetts Berry Notes from the UMass Extension Fruit Team.

Massachusetts IPM Berry Blast

April 6, 2017

Winter Moth UPDATE
Heather Faubert, URI
Winter moth eggs started hatching in Franklin, MA, about 10 miles north of Rhode Island. This site usually has very early egg hatch and there are hundreds of eggs to monitor. Only a very small portion of eggs have changed from orange to blue and even fewer eggs have hatched. Looking at predicted weather, I think apple and blueberry growers not along the coast, should spray an insecticide this weekend. Coastal properties are cooler and we expect eggs to hatch later there. Dormant oil (2-3% solution) added to an insecticide spray can help control winter moth eggs, but temperatures are predicted to be near freezing Saturday night. Dormant oil should not be applied if temperatures are expected to go below 40 degrees for 48 hours after application.
See IPM Berry Blast from 4/4/17 for more information on control options.
Newly Hatched Winter Moth Caterpillars, magnified.  Blue eggs ready to hatch or already hatched, magnified.
Fig. 1) Newly hatched winter moth caterpillars, magnified.     Fig. 2) Blue eggs ready to hatch or already hatched, magnified.
Photos by H. Faubert, URI

Archived IPM Berry Blasts are available at the UMass Extension Fruitadvisor website.
Where brand names for chemicals are used, it is for the reader's information.  No endorsement is implied, nor is discrimination intended against products with similar ingredients.  Please consult pesticide product labels for rates, application instructions and safety precautions.  The label is the law.  Users of these products assume all associated risks.
We thank Nourse Farms for their underwriting of this newsletter which allows us to keep subscription rates low.
This work was supported in part by funding provided by USDA-NIFA Extension Implementation Program, Award No. 2014-70006-22579

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