Early-season applications of the ovicide chlordimeform frequently result in positive yield responses above that expected from insect control. These findings have led growers to employ chlordimeform in "yield enhancement" programs consisting of 4-6 applications at 5-7 day intervals beginning at pinhead square.

Previously reported findings have suggested that this yield response results from favorable alterations in crop fruiting profiles and nitrogen utilization patterns. A field study was conducted during 1985 and 1986 at the Central Crops Research Station in Clayton, North Carolina to evaluate chlordimeform's impact on these developmental processes. Cotton was treated with aldicarb in-furrow at planting to reduce early-season insect damage that might alter either the fruiting profile or nitrogen utilizations patterns.