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How to Manage Pests

UC Pest Management Guidelines

White foam oozing out of an eggplant stem is indicative of foamy canker.


Foamy Canker

Pathogen: Unknown

(Reviewed 4/10, updated 4/10)

In this Guideline:


Some species of bacteria or other microorganisms either cause or are associated with a copious white frothy material that exudes from the axil of leaf petioles and the main stem and may drip to the soil. A wound may or may not be obvious. This condition usually occurs during warm weather and when ample soil moisture is present. Fruit covered with the sticky exudate may be unmarketable. If severe, affected branches stop producing.


The cause of this malady is unknown and currently there are no management recommendations regarding it. The problem has been observed on the primary bell-shaped variety "Black Bell" as well as on other varieties. Removing the infected plants may help reduce the spread.


[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Eggplant
UC ANR Publication 3475
J. J. Stapleton, UC IPM, Kearney Agricultural Center, Parlier
R. M. Davis, Plant Pathology, UC Davis

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