Foliar Fertilization Does Not Reduce Soybean Aphid Populations, Change Plant Nitrogen and Potassium, or Protect Yield from Aphid Feeding, under Non‐limiting Nutrient Conditions

The soybean aphid ( Aphis glycines Matsumura) is a key pest of soybean [ Glycine max (L.) Merr] in the Midwest. In the early 2000s, foliar fertilization was sometimes recommended to reduce aphid populations, regardless of soil or plant nutrient levels in fields. Nitrogen (N) fertilization or potassium (K) deficiency can increase aphid populations, so the impact of foliar fertilization on soybean aphid was not clear. This study measured percent N...