Michigan State University Extension
Michigan Soybean Information - 00000092
11/16/00
Soybean Aphid (Aphis glycines)
List of files and visuals associated with this text.
Under heavy soybean aphid infestation, undersides of leaves
(Vis. 1) and stems
(Vis. 2) may be covered by aphids. Leaves wilt, curl, or
crinkle (Vis. 3) and, if potassium is deficient, have
yellow margins resembling potato leafhopper burn (Vis. 4).
Upper leaves tend to have the most aphids, while lower
leaves may be sticky from a sweet substance, honeydew,
secreted by the aphids. Grayish sooty mold grows on leaves
covered with the sugary substance (Vis. 5). On the lower
leaves and ground, there may be numerous shed skins and
dead aphids it may appear that the plant has "dandruff".
In general, late-planted and stressed soybeans are at
greatest risk for infestation. Currently, insecticides are
not recommended for control except in extreme cases.
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to commercial products or trade names does not imply
endorsement by MSU Extension or bias against those not
mentioned. This information becomes public property upon
publication and may be printed verbatim with credit to MSU
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a commercial product or company.
This file was generated from data base S1 on 11/16/00.
Data base S1 was last revised on 11/16/00.
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