Potato famine disease striking home gardens in U.S.

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

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...

"This pathogen can move great distances in the air. It often does little jumps, but it can make some big leaps."

McGrath said the impact on the farmer will depend on how much the pathogen is spread. "Eastern New York is seeing a lot of disease," she said.

She said commercial farmers will be able to use fungicides containing chlorothalonil to control the blight.

And while some sprays have also been approved for organic use, many organic farmers do not use them, making it much harder to control...

:shifty:Stupid hippies.