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Journal of Entomology

Year: 2013  |  Volume: 10  |  Issue: 3  |  Page No.: 147 - 155

Effect of Different Mulberry Varieties and Seasons on Growth and Economic Traits of Bivoltine Silkworm (Bombyx mori)

Harendra Kumar, Yuvana Satya Priya, Mukesh Kumar and Vadamali Elangovan

Abstract

The success of sericulture industry is mainly based on leaf quality and appropriate environmental conditions for silkworm rearing. Mulberry leaves are exclusive source of nutrition for silkworm. This study was aimed to assess the impact of different mulberry varieties namely S1, S13, S146, S1635 and TR10 and seasons viz., spring, autumn, summer and monsoon on growth and cocoon characteristics of bivoltine silkworm (Bombyx mori). Among the seasons, the spring season showed better growth and cocoon characteristics followed by autumn, summer and monsoon seasons. The better traits observed during favourable seasons than unfavourable seasons might be due to the influence of climatic conditions. The mulberry varieties did not show significant impact on growth and economic traits studied, however the effect of different mulberry varieties on cocoon yield was observed in the following order: S1>TR10>S146>S1635>S13. The highest cocoon yield for 10000 larvae was observed in S1 (8.949 kg) while the minimum yield was observed in S13 (8.794 kg). The traits such as larval length, larval width, larval weight, shell ratio, filament length and filament weight showed positive correlation with yield. The results showed the suitability of S1 mulberry variety and spring season for commercial rearing and more productivity.

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