Natural control of cotton insect pests was high throughout the season in tests in two 20-acre fields, ½ of each planted to solid cotton and the other to 50-ft strips of cotton, alfalfa, corn, oats, and soybeans.Heliothisspp. damaged 1.06% of the bolls in solidplanted cotton and 0.60% of the bolls in strip-planted cotton in 1 field, but there was no difference in the 2nd field. Damage was below the economic threshold in all plots. Predation of marked cabbage looper eggs was higher in strip-planted plots on the few dates when differences were significant. Average seasonal survival of marked eggs of cabbage looper,Trichoplusia ni(Hübner), for 72 hr was 35.4% less in the stripplanted plot in one field and 14.6% less in the strip-planted plot in the other field than in solid-planted plots. Populations of predators, primarilyOrius insidiosus(Say) and coccinellids, generally did not differ significantly between solid-planted and stripplanted plots.