May 4, 2011 | View All Issues
Vine mealybug populations in Carneros are very synchronous right now. We found mainly adults. Most of the adults were laying eggs. We could expect egg hatch within a couple of weeks.
As the eggs hatch and crawlers emerge, that will be an appropriate window of insecticide applications (both chemigation and foliar applications). For information on insecticide efficacy for VMB visit http://ucanr.org/CESonomaMBcontrol
We also found many adults and egg sacs at the St Helena site. Some of the eggs have begun to hatch, and we also found crawlers at that site. At this St Helena site, development is slightly more advanced than in Carneros.
VMB development may vary by site. It is best to understand the populations in your vineyard to inform management decisions.
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