Influence of Different Treatment Regimes of Phytoecdysteroid on Silkworm, Bombyx mori L.
2007
Nirmal Kumar, S. (Central Sericultural Research and Training Institute, Mysore, India), E-mail: niirmal2003@yahoo.com | Sashindran Nair, K. (Central Sericultural Research and Training Institute, Mysore, India) | Mondal, Sumana (Central Sericultural Research and Training Institute, Mysore, India)
The response of silkworm, Bombyx mori L. to phytoecdysteroid (PE) when administered at different ages of 5∨th instar was studied in the popular bivoltine (CSR2×CSR4) and multi×bivoltine (PM×CSR2) silkworm hybrids, reared on the Victory-1 variety of mulberry leaves. PE was administered to 5∨th instar silkworm per os at a rate of 250 ㎍ per 100 larvae to different batches of silkworm at 0, 24, 48, 72, 96, 120, 144 hrs and at the onset of cocoon spinning when a few larvae were ripe. The larval and mounting duration, cocoon yield and cocoon characters were influenced by PE.
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