Results are reported from the second year of a 3-year project aimed at examining the feasibility of calibrating the standard 75-50 cone-shaped Heliothis spp. pheromone trap. Replicating year one (1987), four traps/spp were deployed around four, 20 acre plots in cultivated cotton. Traps were monitored daily, nighttime observations of moth activity were conducted four nights/week, and whole plants were inspected for eggs and larvae within each plot twice/week. Unlike the previous year, a higher proportion of the total number of Heliothis males captured in traps for the season were H. zea compared to H. virescens (60:40); however, H. virescens was still the predominant Heliothis species ovipositing (>95%) on cotton in the area sampled. For H. Virescens, as in 1987, the correlation between moths captured by hand at night and egg numbers was highly significant, and the highest correlation between egg counts and trap captures occurs 1987. Impact of abiotic factors on the system, particularly temperatures, insecticide applications, and drought conditions, is addressed.