Casual Agent:Phytophthora cinammomi
Symptoms and Damage
• Tree infected with root rot have small, fibrous feeder rots which are black, brittle which later die from the infection.
• Avocado tree exhibits small, chlorotic or pale green leaves when infected with root rot.
• Leaves later wilt, develop necrotic lesions. Branches on the top of the tree die back, resulting to fruits being exposed to sun scald.
• There is reduction in fruit production as a result of root rot. The tree may die slowly or rapidly depending with the infection rate.