Phytophthora root diseases (Phytophthora spp.) Phytophthora is a leading cause of tree and shrub death in Southern California gardens. Phytophthora diseases have a very wide host range. Citrus gummosis, avocado root rot, and azalia wilt are just a few of the many diseases caused by Phytophthora. Symptoms of Phytophthora root rot include wilting and leaf chlorosis, reduced leaf size, overall stunted growth, twig an branch dieback, and ultimaletly, tree and shrub death.
Phytophthora spp. are a collection of mostly soil inhabiting microscopic-sized water mold fungi.* They kill plants or reduce reduce vigor by damaging roots and girdling stems. Phytophthora diseases are managed by a combination of chemical and cultural practices. Because Phytophthora thrive in water saturated soils, strict water management is an essential part of an effective Phytophthora prevention program.
Smaller Leaf size is a symtom of Phytophora
Make an appointment with the tree doctors at Mitchell Pest Control, Inc., to evalualte trees and shrubs at risk of Phytophthora root diseases.
Thin canopy symptom of Phytophora