Plant disease hits eastern US tomatoes

[Lizw]

An excerpt from a San Antonio newspaper: http://hosted.ap.org/dynamic/stories/U/US_FARM_SCENE_LATE_BLIGHT?SITE=TXSAE. As though we needed anything else right now.

By HOLLY RAMER
Associated Press Writer

CONCORD, N.H. (AP) -- Tomato plants have been removed from stores in half a dozen states as a destructive and infectious plant disease makes its earliest and most widespread appearance ever in the eastern United States.

Late blight - the same disease that caused the Irish Potato Famine in the 1840s - occurs sporadically in the Northeast, but this year's outbreak is more severe for two reasons: infected plants have been widely distributed by big-box retail stores and rainy weather has hastened the spores' airborne spread.

The disease, which is not harmful to humans, is extremely contagious and experts say it most likely spread on garden center shelves to plants not involved in the initial infection. It also can spread once plants reach their final destination, putting tomato and potato plants in both home gardens and commercial fields at risk.

Meg McGrath, professor of plant pathology at Cornell University, calls late blight "worse than the Bubonic Plague for plants."

"People need to realize this is probably one of the worst diseases we have in the vegetable world," she said. "It's certain death for a tomato plant."

Tomato plants have been removed from Home Depot, Wal-Mart, Lowe's and Kmart stores in all six New England states, plus New York. Late blight also has been identified in all other East Coast states except Georgia, as well as Alabama, West Virginia and Ohio, McGrath said.

It is too early in the season to know whether infected plants will taint large crops or negatively affect commercial growers. But if that happens, growers could be forced to raise prices to cover costs associated with combating the disease.

 

[tyto]

Re: Plant disease hits eastern US tomatoes

Another news story on the fungus among us.

By Julie Steenhuysen
Fri Jul 10, 5:22 pm ET

CHICAGO (Reuters) ? Late blight, which caused the Irish Potato Famine of the 1840s and 1850s, is killing potato and tomato plants in home gardens from Maine to Ohio and threatening commercial and organic farms, U.S. plant scientists said on Friday.

"Late blight has never occurred this early and this widespread in the United States," said Meg McGrath, a plant pathologist at Cornell University's extension center in Riverhead, New York.

She said the fungal disease, spread by spores carried in the air, has made its way into the garden centers of large retail chains in the Northeastern United States.

"Wal-mart, Home Depot, Sears, Kmart and Lowe's are some of the stores the plants have been seen in," McGrath said in a telephone interview.

The disease, known officially as Phytophthora infestans, causes large mold-ringed olive-green or brown spots on plant leaves, blackened stems, and can quickly wipe out weeks of tender care in a home garden.

McGrath said in her 21 years of research, she has only seen five outbreaks in the United States. The destructive disease can spread rapidly in cooler, moist weather, infecting an entire field within days.

"What's unique about it this year is we have never seen plants affected in garden centers being sold to home gardeners," she said.

This year's cool, wet weather created perfect conditions for the disease. "Hopefully, it will turn sunny," McGrath said. "If we get into our real summer hot dry weather, this disease is going to slow way down."

http://news.yahoo.com/s/nm/20090710/us_nm/us_blight_usa_3