UC IPM Online UC ANR home page UC IPM home page

UC IPM Home

SKIP navigation

 

How to Manage Pests

UC Pest Management Guidelines


Downward curling of leaf blades and necrotic streaking caused by tobacco streak virus.

Tomato

Tobacco Streak

Pathogen: Tobacco streak virus in the ilarvirus group

(Reviewed 1/08, updated 1/08)

In this Guideline:


SYMPTOMS AND SIGNS

Downward curling of leaf blades on tomato plants with tobacco streak is common. Leaf veins become necrotic and can lead to necrotic blotches, especially on young leaves. Fruit may develop necrotic ringspots. Necrotic streaks on young stems extend to flowers and leads to flower drop.

COMMENTS ON THE DISEASE

Tobacco streak is a widespread disease of tomato, but it generally does not cause major losses. Spread of the virus is associated with pollen and/or thrips (including western flower thrips, Frankliniella occidentalis, and the onion thrips, Thrips tabaci). Seed transmission is reported to occur in some beans, chickpeas, and weeds. The host range for this virus is wide and includes common weeds such as mustards, radishes and thistles.

MANAGEMENT

There is no genetic resistance to tobacco streak in tomatoes and no effective management strategies are available.

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Tomato
UC ANR Publication 3470
Diseases
R. M. Davis, Plant Pathology, UC Davis
G. Miyao, UC Cooperative Extension, Solano/Yolo counties
K. Subbarao, USDA Agricultural Research Station, Salinas
J. J. Stapleton, UC IPM Program, Kearney Agricultural Center, Parlier
Acknowledgments for contributions to the disease section:
B. W. Falk, Plant Pathology, UC Davis


Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2014 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   /PMG/r783102311.html revised: April 25, 2014. Contact webmaster.