Grape Leaf Miner, Antispila viticordifoliella Clemens (Lepidoptera: Heliozelidae)
The larva of the grape leaf miner is a small caterpillar that feeds between the upper and lower leaf surfaces. When the larva is fully developed, it pupates within the area of the leaf where it has been feeding; this section eventually falls out, leaving a hole in the leaf.
The grape leaf miner is not an economically important insect; however, small numbers usually occur in vineyards, particularly in abandoned and backyard plantings.
Grape leaf damaged by larva of the grape leaf miner. The leaf miner larva feeds between the upper and lower leaf surfaces. The section of the leaf damaged in this manner eventually falls out.
Current pesticide recommendations may be found HERE