1. UC IPM
Orange and brown lesion on the wood and white exudate on the bark of an old avocado trunk with Phytophthora canker and collar rot caused by <I>Phytophthora citricola.</I>.
Orange and brown lesion on the wood and white exudate on the bark of an old avocado trunk with Phytophthora canker and collar rot caused by Phytophthora citricola..
Credit: David Rosen