Biology and mass rearing of Mythimna separata (Walker) (Lepidoptera: Noctuidae) using young leaves of Corn
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Abstract
The results showed that, on average, the total development period from egg to adult of 28.95±1.89 days for the male and 28.43 ±1.55 days for the female. It passed through six larval instars over 16.07 ±1.31 days for the male and 15.96 ±0.5 days for the female larva. The durations in days for the different larval instars: 1st and 5th larval instars, 2.0 for both male and female, 2nd 1.43 ±0.53 and 1.5 ±0.58, 3rd 1.86 ±0.8 and 1.5 ±0.8, 4th 2.14 ±0.35 and 2.5 ±0.58 and 6th 3.71±0.49 and 4.0 days for the male and female, respectively; pre-pupal period of 1.57 ±0.5 days for the male and 1.55 ±0.5 days for the female. The pupal period was 8.88 ±1.04 days for the male and 8.45 ±0.55 days for the female. Female moths laid up to 730 eggs, and adult longevity for males and females were 7.54 ±2.10 and 8.09 ±1.88 days, respectively. The native variety of corn, IPB var 6, supported the optimum growth and development of the larvae of M. separata. Nineteen generations were successfully reared in the laboratory.
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