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How to Manage Pests

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

| Start key | Management guidelines: Alfalfa | Cotton |

Based on the key characteristics, the aphid is likely to be

Spotted alfalfa aphid (Therioaphis maculata)

Spotted alfalfa aphid adult and nymphs.
Click on photo to enlarge.

Find out more about spotted alfalfa aphid on

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