How to Manage Pests

UC Pest Management Guidelines


Curly Top

Pathogen: Beet curly top virus (BCTV)

(Reviewed 12/09, updated 12/09)

In this Guideline:


Symptoms of curly top include stunting, stiffness, short internodes, and leaves that are darker green than normal. Runner tips tend to turn up. Plants infected in seedling stage die. Leaves may roll upward and have a crinkled appearance. Older plants may turn yellow and die.


Curly top is rare in cucurbits. The virus is transmitted by the beet leafhopper, Circulifer tenellus; the leafhopper retains the virus and is capable of transmitting it for its entire life. Curly top virus has a wide host range including many weeds.


No control is practiced.


[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

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Statewide IPM Program, Agriculture and Natural Resources, University of California
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