Effects of Parasitism on the
Development and Food Consumption of Larva of Spilosoma obliqua (Walker) by its Parasitoid Apanteles obliquae Wilkinson
Abstract:
The effects of parasitism of
braconid wasp, Apanteles obliquae
Wilkinson (Hymenoptera: Braconidae) on the developmental stages and food
consumption of larva of Spilosoma
obliqua (Walker) were studied in the laboratory. The differences in
growth and development of host larvae were marked with regard to ecdysis
(moult) and size in parasitised larvae. The reduction in host size due to
parasitism was observed in parasitised larvae. S. obliqua larvae that were parasitised consumed significantly
less leaf area than the non-parasitised larvae. The greater portion (96.95
sq.cm. of jute leaf) of feeding by non-parasitised larva occurred after the
host larva reached the 5th instar stage, whereas feeding by parasitised larva
of same age remained at low level (32.54 sq.cm. of jute leaf). Results
indicated that larva parasitised at 3rd instar stage cause considerably less
damage (one third of healthy larva) to the host plant than non- parasitised
larva.
How to cite this article
Nargis Sultana , 2003. Effects of Parasitism on the
Development and Food Consumption of Larva of Spilosoma obliqua (Walker) by its Parasitoid Apanteles obliquae Wilkinson. Journal of Biological Sciences, 3: 466-473.
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