Cotton and Alfalfa Aphid Key: Cauda and cornicles

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

From "body is black (shiny or dull)"

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

Cauda is bushy with many hairs, and cornicles and cauda are of equal length

Cauda is not bushy, has few hairs, and cornicles are longer than cauda

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How to Manage Pests

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

From "body is black (shiny or dull)"

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