Fecundity and number of emerging Helicoverpa armigera larvae in the greenhouse cage trial.

Twenty pairs of moths were released in a screened quarantine cage (2 m×2 m×2 m) located in a greenhouse, which contained four mature cotton plants. The total number of eggs or larvae was recorded. Values are expressed in absolute terms as the mean ± SD. Values with the same letter are not significantly different at the P>0.05 level (ANOVA followed by a t-test).