ATTRA is the national sustainable agriculture information service operated by the National
Center for Appropriate Technology, through a grant from the Rural Business-Cooperative Service,
U.
S.
Department of Agriculture.
These organizations do not...
More
ATTRA is the national sustainable agriculture information service operated by the National
Center for Appropriate Technology, through a grant from the Rural Business-Cooperative Service,
U.
S.
Department of Agriculture.
These organizations do not recommend or endorse products,
companies, or individuals.
NCAT has offices in Fayetteville,Arkansas (P.
O.
Box 3657, Fayetteville,
AR 72702), Butte, Montana, and Davis, California.
National SustainableAgriculture Information Service
www.
attra.
ncat.
org
By George Kuepper and Preston Sullivan
NCAT Agriculture Specialists
March 2004
©NCAT 2004
PEST MANAGEMENT TECHNICAL NOTE
ORGANIC ALTERNATIVES FOR LATE
BLIGHT CONTROL IN POTATOES
Late blight (Phytophthora infestans) is a fungal
disease that attacks the leaves, stems, and tubers
of potato plants.
In the 1840s, P.
infestans caused
the Irish potato famine, when a million people
starved and another million and a half emigrated
out of Ireland (1).
In recent years, highly aggressive strains of
Less
