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The Soybean
Aphid is capable of causing significant reduction in growth and seed production
in soybeans. A study in China found that seed yields were reduced by 27.8% and
plant height decreased by 8 inches in infested plants as compared with the
control. The soybean aphid is a known vector of a number of plant virus diseases
including soybean mosaic and soybean stunt. Known infestations in crops observed are distributed
sporadically through a field and in quite small areas. Thus they can be
difficult to detect. Plant damage is in the form of leaf distortion (where very
dense aphid populations occur) and severe vigor loss.
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