Capture numbers of Heliothis virescens and zea from 75/50 cone traps dispensing synthetic sex pheromone were compared to egg-larvae counts made during whole cotton plant exams. For both species, traps were deployed at major compass points around each of four, 20 acre plots embedded in cultivated cotton, and monitored daily from the time of planting to picking (May - Sept. 1987). Within each of the 20 acre plots, whole plant exams were made twice/week. The number of eggs and larvae, amount of damage, and crop condition were monitored; egg and larvae were reared for species identification. In both trap captures and egg counts, virescens was the predominant species during the '87 field season in the Delta; 80% of all male moths trapped and 98% of all immatures collected were virescens. The correlation between moth and egg numbers showed close association until cutout (ca. 10 Aug.); subsequently, when captures were high only cotton under pivot irrigation experienced substantial oviposition. Relationships between trap captures, hand captured adult counts and egg counts. and other biotic and abiotic factors are discussed.