Start Date

19-12-1990 12:00 AM

Description

Woolly cupgrass (Eriochloa villosa [Thumb.] Kunth.) is a relatively new weed in Iowa. Woolly cupgrass is native to East Asia, specifically China and Korea, and was first reported in the United States during the 1940's. The first identified infestation in Iowa was located in Ringgold County and reported in 1957. Since then, economically important infestations have been discovered throughout Iowa, Illinois, Minnesota, and Wisconsin. Recent estimates suggest that woolly cupgrass infests approximately 7 to 10% of the row crop acres in Iowa. While this weed can be found in most areas of Iowa, localized and severe infestations occur in northwest, west central, north central and east central Iowa.

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Dec 19th, 12:00 AM

Woolly Cupgrass Biology and Management

Woolly cupgrass (Eriochloa villosa [Thumb.] Kunth.) is a relatively new weed in Iowa. Woolly cupgrass is native to East Asia, specifically China and Korea, and was first reported in the United States during the 1940's. The first identified infestation in Iowa was located in Ringgold County and reported in 1957. Since then, economically important infestations have been discovered throughout Iowa, Illinois, Minnesota, and Wisconsin. Recent estimates suggest that woolly cupgrass infests approximately 7 to 10% of the row crop acres in Iowa. While this weed can be found in most areas of Iowa, localized and severe infestations occur in northwest, west central, north central and east central Iowa.