How to Manage Pests

UC Pest Management Guidelines


Squash Mosaic Virus

Pathogen: Squash mosaic virus

(Reviewed 11/05, updated 6/08)

In this Guideline:


Symptoms of squash mosaic include mosaic patterns and mottling of the leaf along with deformed fruit.


The virus is vectored by the spotted cucumber beetle (Diabrotica spp.) and other related beetles. The beetles can retain the virus up to 20 days after feeding on an infected plant. The virus is also seed-borne.


Use virus-free seed to eliminate primary inoculum.


[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Cucurbits
UC ANR Publication 3445


R. M. Davis, Plant Pathology, UC Davis
T. A. Turini, UC Cooperative Extension, Imperial County
B. J. Aegerter, UC Cooperative Extension, San Joaquin County
J. J. Stapleton, UC IPM Program, Kearney Agricultural Center, Parlier

Acknowledgment for contributions to Diseases:
W. D. Gubler, Plant Pathology, UC Davis

Top of page

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2017 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance.

Agriculture and Natural Resources, University of California

Accessibility   Contact webmaster.