How to Manage Pests
Pests in Gardens and Landscapes
Avocado root rot—Phytophthora cinnamomi
Avocado root rot causes leaves to be smaller than normal. They are usually pale or yellow green. New
growth is absent or stunted. Feeder roots are blackened and dead.
Avocado root rot is associated with excess soil moisture due to overirrigation or poor drainage. Good water management is essential to reduce the threat of rot.
It prolongs the life of diseased trees and can prevent spread
to other trees. Avoid prolonged saturation of the soil. Plant
on mounds and provide good soil drainage. Some rootstocks
may provide resistance.
tree dying from P. cinnamomi