My white grapes are being "attacked" by wasps now that the sugar level has reached 10-18 Brix. They puncture the berries and cause sour rot. Some varieties are more susceptible than others and losses are accumulating. What control measures are available?
My white grapes are being "attacked" by wasps now that the sugar level has reached 10-18 Brix. They puncture the berries and cause sour rot. Some varieties are more susceptible than others and losses are accumulating. What control measures are available?
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