Effect of foliar application of Vermiwash and nitrogen on Mulberry Growth and commercial characteristics of Silkworm (Bombyx mori L.)
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Date
2018
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SKUAST-Kashmir
Abstract
The present study “Effect of foliar application of vermiwash and nitrogen on mulberry growth and commercial characteristics of the silkworm (Bombyx mori L.)” was carried out at College of Temperate Sericulture, SKUAST-K Mirgund during summer in the year 2017. Disease free layings of popular double hybrid (CSR6 x CSR26) x (CSR2 x CSR27) were utilized for the present study. The larvae were fed with normal mulberry leaves till fourth moult. Silkworm larvae in the fifth age till spinning were fed on mulberry leaves sprayed with different concentrations of vermiwash 5, 10 and 15 percent alone and in combination with one percent nitrogen. Daily four feeds of mulberry leaves were given to the silkworms. There was significant improvement in growth and yield of mulberry and also in most of the commercial characteristics of Silkworm Bombyx mori L. through foliar application of vermiwash and nitrogen. The total branch length was maximum (3,774.667cm) in T7 (15% vermiwash + 1% Nitrogen) and minimum (2819 cm) was recorded in T0 (control). The highest Fresh weight of 100 leaves (453.733 g) was observed in T7 (15% vermiwash + 1% Nitrogen) and the lowest (331.517 g) was observed in T0 (control). The maximum yield (2.875 kg) was observed in T7 (15% vermiwash + 1% Nitrogen) and the minimum leaf yield (2.346 kg) was recorded in T0 (control).The maximum moisture content (73.07 %) was found in case of T7 (15% vermiwash + 1% Nitrogen) and the lowest (67.34 %) was recorded in case of T0 (control). The maximum larval weight (46.53 g) was observed in T7 (15% vermiwash and 1% nitrogen) and the minimum value (40.97 g) was recorded in T0 (control). The larval duration was statistically non-significant.Cocoon weight was highest (1.979 g) in T7 (15% vermiwash and 1% nitrogen) and the lowest cocoon weight (1.536g) was recorded in T0 (control). The shell weight (0.448 g) was maximum in T7 (15% vermiwash and 1% nitrogen) and the minimum shell weight (0.343 g) was recorded in T0 (control). The maximum shell ratio (22.63%) was observed in T7 (15% vermiwash and 1% nitrogen) and the lowest shell ratio (19.40%) was observed in T0 (control).The filament length (1171.70m) was maximum in T7 (15%vermiwash and 1% nitrogen and the minimum filament length (929.50m) was observed in T0 (control).The cocoon yield by number was statistically non-significant. The maximum yield of cocoons (17.88 kg)was recorded in T7 (15% vermiwash and 1% nitrogen) and minimum yield (12.73 kg) was recorded in T0 (control).The thinnest denier (2.890) was recorded in T0 (control) and the thickest denier (3.370) was recorded in T7 (15%vermiwash) however the treatment is non-significant. The highest raw silk percentage (14.322) was recorded in T7 (15% vermiwash and 1% nitrogen) and the lowest raw silk percentage (11.061) was observed in T0 (control).
Description
M.Sc Thesis submitted to SKUAST Kashmir
Keywords
vermiwash, foliar application commercial characteristics, cocoon, Sericulture