Division of Agriculture and Natural Resources
Division of Agriculture and Natural Resources
Division of Agriculture and Natural Resources
University of California
Division of Agriculture and Natural Resources

UC Cooperative Extension | Agricultural Experiment Station

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A Field Key to Lygus Species of the San Joaquin Valley
Lygus bugs are a key economic pest of many crops in California, including field crops, vegetables, nuts and fruits. There are 43 species of Lygus bugs in the world, 34 of which are known to exist in North America. Three species are reportedly found in the central San Joaquin Valley of California: Lygus hesperus, Lygus elisus, and Lygus lineolaris. To date, there has been no simple method to distinguish among these three species. Pest management strategies must begin with correct identification.

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