Mar 26, 2014 | View All Issues
On Monday, March 24, I monitored grape mealybug populations at a vineyard in Oakville.
I found 1st and 2nd instar nymphs on one year old wood. No GMB nymphs were found on the permanent wood or on leaves. Sampling techniques for GMB are demonstrated in the Grape Mealybug Spring Monitoring video.
Spring insecticide treatments can be an effective means to control GMB populations. An effective treatment is timed to occur when crawlers are present and somewhat exposed (on one year old wood and leaves) in early spring.
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