Lygus spp. (Hemiptera: Miridae) and Their Parasites in Agricultural Areas of Southern Arizona

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Abstract
Lygus spp. and their parasites were surveyed on alfalfa, cotton, grain sorghum, guayule, and a number of weed hosts in southern Arizona. Lygus hesperus Knight, L. elisus Van Duzee, and L. desertinus Knight were found at Yuma, while these species and L. lineolaris (Palisot de Beauvais) were found in other areas. L. hesperus was the predominant species found, although others predominated on individual plant species. The mymarid Anaphes ovijentatus (Crosby & Leonard), a parasite of eggs, was the most common parasite found, with monthly averages of up to 100% parasitization. Leiophron uniformis (Gahan), a braconid parasite of the nymphs, was found in all areas surveyed, but was much less abundant than A. ovijentatus. The tachinid Alophorella sp. emerged in small numbers from adults collected at Tucson and Benson.