Plan Ahead to Avoid Antrhacnose
November 01, 2001
Anthracnose is a disease that you dont want in your dry beans.
The fungal infection can dramatically reduce yield and quality.
Plant scientists discovered Anthracnose in a few north central North Dakota Pintoba pinto fields this fall. The current outbreak is thought to originate from infected seed originally imported from Manitoba. But Anthracnose can infect other classes and varieties of dry beans. Other fields may be infected but just havent been identified yet, says Duane Berglund, North Dakota State University extension agronomist.
To prevent the spread of Anthracnose, Berglund suggests these steps now:
Moldboard plow or disc infected fields immediately following harvest. Tillage must incorporate all plant residues and beans.
Dont plant bin-run seed. Instead, plant certified seed that is tested to verify it is Anthracnose free. The practice of saving and replanting commercial beans (bin run) maybe the worst economic decision bean growers can make for the 2002 growing season, Berglund says.
Have all suspected seed tested for bean Anthracnose. Submit several samples to increase the odds that if any infected seeds are in the lot, they will be included in the sample. The North Dakota State Seed Department can test for this disease.
Purchase seed from reputable dealers.
Rotate to dry beans three full years after Anthracnose infection occurs.
Control and eliminate volunteer dry bean plants in 2002.
Seed treatment is not completely effective to control bean Anthracnose, and currently no fungicide seed treatment is labeled for use in the United States. Resistant varieties to the disease is the best answer to its ultimate control, Berglund says.
For additional information contact: Duane Berglund, NDSU Plant Science Dept. (701-231-8135); Luis del Rio NDSU Plant Pathology Dept. (701-231-7073); and Ken Bertsch, ND State Seed Department ( 701-239-7210).