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How to Manage Pests

Identification: Key to Aphids Commonly Found in San Joaquin Valley Alfalfa and Cotton

From "dorsal abdomen is without spots"

Click on the illustration or description that best describes the aphid.

view of converging antennal tubercles   view of cdiverging antennal tubercles
Antennal tubercles are converging   Antennal tubercles are diverging
Where are the antennal tubercles?

Statewide IPM Program, Agriculture and Natural Resources, University of California
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