GREEN
PEA APHID
Aphids may become very abundant
on alfalfa and should not be confused with leafhoppers, since many aphids are
required to cause economic injury. If a cup or more of aphids are collected in
10 sweeps, control may be warranted. See chart for insecticides
labeled on aphids.
Corn,
Soybean, Wheat, and Alfalfa Field GuideBulletin 827