The photo in the story below, shows the signs of tomato yellow leaf curl virus. - JS

By LAURA KURTZMAN, Associated Press Writer

SACRAMENTO - An insect-borne virus that has killed tomato plants across Central America, Florida and Georgia has been detected in California for the first time.

The virus, known as tomato yellow leaf curl, devastated crops in the Dominican Republican and in Mexico, forcing those countries to curtail the growing season to contain the spread of the disease.

Tomatoes are California’s eighth largest crop. The state supplies the vast majority of the nation’s processed tomatoes - 95 percent, according to the California Tomato Growers Association.

In Arkansas, federal statistics show about 1,200 acres of tomatoes were harvested last year.

“Where this virus is present, it will absolutely kill the tomatoes,” said Ross Siragusa, president of the association, which represents farmers who supply the state’s $2 billion a year processed tomato industry. “It’s a very difficult disease to fight.”

California has some natural advantages in stopping the disease from spreading that other locales lack.

Tomato virus

The cold, wet winters in the Central Valley, where most tomatoes are grown, act as barriers to the bemisia white flies that carry the disease. The flies are native to Imperial, Riverside and San Diego counties in the southern part of the state, but not to any counties in the Central Valley.

“We’re cautiously optimistic that those conditions are going to be very unfavorable to establishment of the virus,” said Robert Gilbertson, a plant pathologist at the University of California, Davis.

The diseased plants were found in March at a greenhouse in Brawley, which is near the border with Mexico. Experts do not know how the virus spread there. It could have been brought by tomato transplants from Mexico or Texas. Or the virus could have been carried by bemisia flies.

The virus causes tomato plants to become stunted and grow abnormally upright. Flowers usually fall off before the fruit sets. And leaves are small and crumpled with an upward curl. They also turn yellow.