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KMID : 1041219930350010069
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Journal of Sericultural and Entomological Science
1993 Volume.35 No. 1 p.69 ~ p.72
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Effect of Testosterone Propionate on the Economic Traits of the Silkworm, Bombyx mori L.
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V. B. Magadum
S. B. Magadum
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Abstract
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Effects of topical application with 1, 5 and 10 μg/ml tertosterone propionate on the precocooning and post cocooning traits of the polyvoltine. Pure Mysore breed of silkworm were studied. Each concentration wns treated independently at 36th to III, IV and V instar larvae(Treatment-1), at 48th to IV and V instar lauae(Treatment-2) and at 72th to V instar larvae(Treatment-3). The repeated applications with each concentration of testosterone propionate in treatment and 2 larvae or single application in treatment 3 variously affected the precocooning and post cocooning traits. Repeated applications of all doses of testosterone propionate (Treatment-1) and single application of 1 & 5 μg of the chemical(Treatment-3) increase the fecundity and decrease the percentage of cocooning and moth emergence.
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