1. UC IPM
Discolored spots on the upper side of an oak leaf shown close-up caused by oak leaf phylloxera, <i>Phylloxera</i> sp. sucking and feeding on the underside of the leaf.
Discolored spots on the upper side of an oak leaf shown close-up caused by oak leaf phylloxera, Phylloxera sp. sucking and feeding on the underside of the leaf.
Credit: Jack Kelly Clark