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UMass Extension Landscape Message June 16, 2017


Landscape Message: Jun 16, 2017

The Landscape Message will be updated weekly April through June. The next message will be available on June 23. To receive immediate notification when the next Landscape Message update is posted, be sure to join our e-mail list.

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From the Southeast Region (Hanson) report

"Most gypsy moth caterpillars are in 4th instar; however at another site in Hanson, there were numerous 5th instar caterpillars. Along with the 4th and 5th instar caterpillars, there were many 2nd - 3rd instar small caterpillars. I asked Dr. Elkinton’s staff about that, and the answer is that the caterpillars were parasitized by a small wasp Cotesia melanoscela (http://www.entomology.wisc.edu/mbcn/kyf503.html). The parasitized caterpillars will not molt into 4th, 5th or 6th instar as a result."

(edit note from Claire: I'm seeing both large and small caterpillars here in Plymouth, MA, so maybe the small wasp is active here.)

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