Soybean Aphid - Agronomic impact

Signs of aphid feeding. Photo credit: University of Wisconsin

Yield loss is related to aphid density at specific crop stages and on the condition of the crop.  Risk of yield loss is greatest when aphid populations peak at beginning flower because of the impact on pod set.

Aphid populations tend to be higher and more damaging in fields or parts of fields where plants are already stressed from dry soil, soil fertility factors, weather conditions, other diseases, or in fields that are planted late. Scout such fields most closely.

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