Skip to main content


Open Main MenuClose Main Menu

Spotted alfalfa aphid. Scientific Name

Therioaphis maculata



Alfalfa and other legumes.



Spotted alfalfa aphid on a leaf. The spotted alfalfa aphid is about 2 mm long, pale yellow, and has four to six rows of dark spots on its back. It is usually found on stems and leaves on the lower portions of the plant. It sucks plant sap and secretes large amounts of honeydew. Its toxic saliva kills seedling plants and may lower the productivity of established fields.



Please contact your local county extension office for current information.

Back To Top