Mar 18, 2011 | View All Issues
GMB are getting ready for spring!
At vineyards from Oak Knoll to St Helena, we found most of the population (92-100%) is in the 1st instar stage.
In Carneros, we found both 1st and 2nd instars (47% and 42%, respectively).
At all sites, GMB were found on the spurs; they are positioned to move onto the leaves soon after the vines break bud.
Weather permitting, we will report next week on VMB.
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