How to Manage Pests

UC Pest Management Guidelines

| All sugarbeet pests | All crops | About guidelines |

Sugarbeet

Whitefly-borne Viruses

Pathogen: Lettuce chlorosis virus (LCV); Lettuce infectious yellows virus (LIYV)

(Reviewed 11/05, updated 1/10)

In this Guideline:

SYMPTOMS AND SIGNS

Symptoms of these viruses are similar to those caused by aphid-transmitted Beet yellows virus. Early symptoms are a very mild mottle that later develop into interveinal yellowing or reddening. Affected plants are stunted. Vascular rings in roots are brown and mature taproots often appear to be pithy.

COMMENTS ON THE DISEASE

Lettuce infectious yellows used to be a problem on sugarbeets grown in the Imperial Valley. It was transmitted by the sweetpotato whitefly, Bemisia tabaci, which has been displaced by the silverleaf whitefly, Bemisia argentifolii (aka B. tabaci, Biotype B– a nonvector of this virus). Currently, lettuce infectious yellows is not a major concern and has not been observed in the field since the early 1990s. Lettuce chlorosis virus is not uncommon in the Imperial Valley, but it has not been associated with yield loss in sugarbeet.

MANAGEMENT

Lettuce infectious yellows is no longer a field problem in sugarbeets, and controls are not deemed necessary for lettuce chlorosis.

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Sugarbeet
UC ANR Publication 3469

Diseases

S. Kaffka, Agronomy and Range Science, UC Davis
T. A. Turini, UC Cooperative Extension, Imperial County
W.M. Wintermantel, USDA-ARS, Salinas
Acknowledgement for contributions to Diseases:
R. T. Lewellen, USDA, Salinas
C. A. Frate, UC Cooperative Extension, Tulare County

Top of page

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2013 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. /PMG/r735100311.html revised: January 10, 2013. Contact webmaster.