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Journal of Biological Sciences
Year: 2009  |  Volume: 9  |  Issue: 5  |  Page No.: 458 - 463

Developmental Biology of the Tiger Moth, Atteva sciodoxa Meyrick (Lepidoptera: Yponomeutidae) under Laboratory Conditions

F. Abood, G.A. Bajwa and Y.B. Ibrahim    

Abstract: The tiger moth, Atteva sciodoxa is a serious pest of tongkat Ali, Eurycoma longifolia. The morphology, development times and fecundity aspects were studied at 27± 2°C, 80± 5% relative humidity and 12 h photoperiod. The eggs were yellow and ovoid in shape with a mean length and width of 1.19± 0.02 and 0.86± 0.02 mm, respectively. Width measurements of larval head capsules showed that A. sciodoxa undergoes five larval instar stages. The mean head capsule widths of the first to fifth instar larvae were 0.55± 0.01, 0.89± 0.01, 1.23± 0.02, 1.52± 0.01 and 2.11± 0.02 mm, while the body lengths were 4.71± 0.1, 8.63± 0.1, 12.87± 0.1, 16.29± 0.1 and 21.74± 0.2 mm, respectively. The mean male and female pupal body lengths were 10.36± 0.1 and 11.26± 0.2 mm, respectively. The mean male and female wing span were 21.63± 0.2 and 24.28± 0.2 mm, respectively. The mean pre-oviposition and oviposition periods were 6.2± 0.23 and 8.5± 0.28 days, respectively. A single female laid on average 106.1± 4.85 eggs with maximum production between days 8-15 of adult emergence. The maximum number of eggs laid per female per day was 20.1± 0.5. The mean hatching time was 5.7± 0.1 days with a mean hatchability of 81.1± 0.6%. The mean larval, pupal and adult periods were 20.7± 0.2, 6.2± 0.8 and 13.2± 0.5 days, respectively. The female pupal period and adult lifespan were significantly longer than the male. Atteva sciodoxa completed its life cycle in 46.28± 0.49 days.

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