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CDFA Plant Health

Curly Top Virus: Program Purpose

The purpose of Curly Top Virus Control Program (CTVCP) is to control the BLH, the only known vector of BCTV. Without the control of BLH, BCTV would threaten well over 1.5 billion dollars of susceptible crops and home gardens.

With only a 1% loss from BCTV in California, it is estimated that during the period 1974-1976, California suffered annual losses of $9.75 million in commercial crops alone. A $2.68 million loss in home gardens can be extrapolated from a 1974 value of $268,199,643 using a 1% infection rate (Yokomi 1979). Without control where required, BLH is capable of an infection rate of 10-40% or more. Infection rates as high as 80% were observed near Huron, California in 1977.

Curly Top Virus
Curly Top Virus