Abstract
Emergence rates and timing of emergence of cotton bollworm (CBW), Heliothis zea (Boddie), and tobacco budworm (TBW), H. virescens (F.), each reared concurrently in field cages erected over three host crops, differed characteristically among hosts. Sorghum produced the highest total number of CBW moths, followed by cotton, and then corn; pigeon pea yielded the highest number of TBW, followed by cotton; sesame failed to support TBW development. Sex ratios differed between the TBW and CBW (1:0.99 and 1:0.90 male/female, respectively; P < 0.01; t test, df = 3), but were consistent across all hosts per species. Emergence patterns of females and males for each host were significantly correlated; however, females frequently began to emerge first and reached 50% emergence 24–72 h prior to males.
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