Asian lady beetles

Description: 

Multicolored Asian lady beetles prey on soybean aphids at the Kellogg Biological Station LTER site.

K. Stepnitz

The soybean aphid Aphis glycines, an invasive insect pest, is the greatest threat to soybean production in the United States. First detected in the United States in 2000, this East Asian pest has spread rapidly through the Midwest and costs growers about $30 million to $50 million per year in reduced yield. By 2005, farmers had responded with a 20-fold increase in insecticide use, spraying millions of acres of soybeans that formerly went untreated -- at increased costs of $10 per acre.

 

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