What is the soybean aphid?
The soybean aphid is a small yellow-green to green aphid (adults are pinhead size, with nymphs even smaller – much smaller than pea aphid or corn leaf aphid) with a pair of dark cornicles (abdominal “tail-pipe” projections) and a light cauda (tail projections). The aphid may be found on soybean stems, young developing leaves (earlier in the season) and, later in the season, under leaves in the middle of the canopy. Any aphid found feeding on soybean is likely to be the soybean aphid. (SEE Photo/Fact Sheet Web page addresses below). Should vegetable growers be concerned? For Snap and Lima Bean, Edible Bean, Growers: This aphid should be specific to soybean (and varieties within the Glycine genus); thus it should NOT be found on snap bean or dry edible bean (Phaseolus spp. or Vicia fabae).
