We are approaching the ideal time for
chestnut growers to scout for Asian chestnut gall wasp. Leaves often remain
attached to the galls during fall and winter, making them highly visible.
Posted on November 17, 2014 by Erin
Lizotte, Michigan State University Extension, and Dennis Fulbright,
Michigan State University Extension, Department of Plant, Soil and Microbial
Sciences
Leaf distortion and gall formation caused
by Asian chestnut gall wasp on chestnut. Photo credit: Dennis Fulbright, MSU
Michigan chestnut growers should be aware
of the threat from Asian chestnut gall wasp (Dryocosmus kuriphilus), a
potentially devastating invasive pest that can infest all species in the genus
Castanea, including American chestnut, ornamental species and those planted for
nut production.
At this time, Asian chestnut gall wasp has
not been found in Michigan, but growers should understand the quarantine
affecting chestnut plant material and scout for this pest regularly to ensure
early detection. For more information, see "Time to start looking for signs of
gall wasps in chestnuts' by Michigan State University Extension.
This material is based upon work
supported by the National Institute of Food and Agriculture, U.S. Department of
Agriculture, under Agreement No. 2013-41534-21068. Any opinions, findings,
conclusions, or recommendations expressed in this publication are those of the
author(s) and do not necessarily reflect the view of the U.S. Department of
Agriculture.
This program is supported in part by North
Central Region - Sustainable Agriculture Research and Extension (NCR-SARE).
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