Moths threaten Californian vineyards
A grape-eating moth is threatening crops in the Napa Valley wine region in California and has prompted the California Department of Food and Agriculture to impose a quarantine regulating the shipment of fruit and some plants. The European grapevine moth first was detected in the Oakville area last September and traps set across the region have confirmed the moth is spreading.
The moth's larvae do the most damage, emerging in the spring to eat young clusters of grapes or flowers. Second and third generation moths eat the ripening grapes.