Strip-Cropping Effects on Abundance of Heliothis1 -Damaged Cotton Squares, Boll Placement, Total Bolls, and Yields in Oklahoma 2

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Abstract
Damaged squares, boll placement, total bolls, and yields from cotton given within plantings of corn, soybeans, alfalfa, peanuts, sorghum, and a check (no crop planted on either side of the cotton) were determined during 2 fruiting seasons. Two generations of Heliothis each year caused the greatest damage to squares in the corn treatment and the least damage in the sorghum treatment. Planting corn, alfalfa, sorghum, and peanuts adjacent to cotton increased the percent damaged squares over the check when both years were averaged. No treatment differences were observed between the number of bolls on the plants. In 1970, fewer plants per foot of cotton row produced significantly more bolls on the bottom half of the plants than did plants spaced closer together, but no differences were noted among treatments. Averaged over both years, the sorghum-treated plots produced the most seed cotton and the corn-treated plots the least. It appears that planting sorghum in a stripcropping system with cotton could be advantageous not only by encouraging and protecting beneficial insects but also by offering other desirable treatment effects.

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