05/18/2022
I found these two jerks making out on a vineyard today. They’re called Western Grape leaf Skeletonizers. Adult moths emerge and lay eggs on the underside of grape leaves. A Skeletonizer caterpillar will eat all of the lamina (green part) and leave only the mid rib and veins.
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Caterpillars and insects with simple digestive systems consume nitrate nitrogen as their food source, so we use analysis and precision nutrient management to synthesize nitrogen in the leaf to a complete protein. By converting nitrate nitrogen into the amino form, we eliminate the food source for insect pests. No nitrate in the leaves means starvation for the insect pests.