- Management and Control - Southern Plant Diagnostic Network (SPDN)
- Statewide Resources - Southern Plant Diagnostic Network (SPDN)
- U.S. Dept. of Agriculture (USDA)
DISEASE SYMPTOMS
Symptoms begin on the lower leaves as small lesions that increase in size and change from gray to tan or reddish brown. Tan lesions, when mature, consist of small pustules surrounded by a slightly discolored deadened area with masses of tan spores on the lower leaf surface. Reddish brown lesions have a larger reddish brown deadened area, with a limited number of pustules and few visible spores on the lower leaf surface. Once pod set begins on soybean, infection can spread rapidly to the middle and upper leaves of the plant.
Information from the
Extension Disaster Education Network
CAUSAL AGENT
- A fungi: Phakopsora pachyrhizi
HOST RANGE
- soybean
- kudzu
- lupine
- common bean
- vetch
- clover
- cowpea, pea
- sweet clover
- medic
GEOGRAPHIC DISTRIBUTION
As of Jan. 13, 2006, found in the following states:
- Florida
- Georgia
- Alabama
- Mississippi
- Louisiana
- Texas
- South Carolina
- North Carolina
For more on geographic distribution, click here
SPREAD of the PATHOGEN and CONTROL OPTIONS
- spread by windborne spores
- controlled by fungicide application
