Light Brown Apple Moth - UPDATE 2/10/2009
The first signs of the second Light Brown Apple Moth generation have been seen this week. Lookout for their eggs. Egg Masses are not easy to see because they appear clear. These take a few weeks to hatch.
At first the grubs (caterpillars) are found only in leaves but will begin to move into bunches when flowering begins.
Pay close attention to you vineyard if you have had LBAM problems in the past. Where present, the grubs feed for a week or two before moving during flowering to feed on bunches. If you detect larvae on more than 10% of shoots, it may be necessary to apply an insecticide such as BT’s, Mimic®, Prodigy®,Avatar®, Proclaim®, Entrust® or Success2® during the flowering period.