UNL Extension



Soybean Aphids on Soybean Plant

This Can You Guess It?? Photo is featured in the July 2007 Nebline Newsletter

Soybean Aphids

Soybean Aphids:

The soybean aphid is new to North America. It is an Asian soybean pest that was first discovered in the United States in Wisconsin in summer 2000. Since then it has spread throughout the north central United States and parts of Canada.

Heavy infestations of this insect can cause significant damage and yield loss. Yield losses exceeding 25% were observed in Minnesota and Iowa in 2000. In addition, soybean aphids can transmit viral diseases, such as alfalfa mosaic, soybean mosaic, bean yellow mosaic, peanut mottle, peanut smut, and peanut stripe.

Although the aphid has only been found in about 15 Nebraska counties, it is likely established throughout eastern Nebraska. Common buckthorn, the aphid's overwintering host, has been found in much of eastern Nebraska. It is particularly prevalent along creek and river bottoms and also can be found as an understory shrub/small tree in wooded areas.

Because the soybean aphid is so new to North America, researchers are still determining soybean aphid biology, impact, and management options in North America. It is likely that the aphid will behave differently in different parts of the Midwest, so it is important that aphid infestations be reported to Nebraska researchers so Nebraska-specific studies can be initiated.

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