One of the main cultivations of the region of Delicias, Chih., is the cultivation of cotton. This is considered a social cultivation since it demands a great quantity of manpower, for the preparation and development of the land. Presently the agricultural cycle P-V 1999, Chih., a surface of 7.403 acres (2,996 hectares) of cotton were planted in Chihuahua, with yields averaging 3.0 ton/ha (2.47 acres), as well as an average of 5.0 bales per hectare in the irrigation district 005. In addition the cotton production demands a strong attention especially in the determination of the populations and damages, as well as the economic thresholds of the pests of economic importance, as well as its control. One of the phytosanitary problems that requires great attention is without a doubt the presence of the Boll Weevil Anthonomus grandis (Boh.).