VALIDATION OF PERFORMANCE OF PURE MYSORE ON DIFFERERNT MULBERRY VARIETIES
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Date
2017-01-12
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
Selected mulberry varieties (M5, S13, S30, S34, S36, MR2, RFS175, S54,
DD1 and V1) revealed that among selected varieties, V1 recorded highest
carbohydrates (25.80 %), crude protein (18.35 %), leaf moisture content (76.31 %),
chlorophyll ‘a’, chlorophyll ‘b’ and total chlorophyll (1.620 mg/g, 0.809 mg/g and
2.429 mg/g, respectively) content with least crude fibre content (9.42 %). Further, V1
variety leaves had maximum macronutrients viz., nitrogen (2.94 %), phosphorous
(0.42 %), potassium (1.62 %), calcium (2.21 %), magnesium (0.51 %) and sulphur
(0.28 %) and micronutrients viz., zinc (174 ppm), iron (255 ppm), manganese (193
ppm) and copper (35 ppm).
The silkworm Pure Mysore reared on V1 mulberry variety leaves exhibited
significantly maximum third, fourth and fifth instar larval weight (0.115 g, 0.615 g
and 3.603 g, respectively), effective rate of rearing (98.67 %), cocoon weight (1.284
g), shell weight (0.181 g), cocoon shell ratio (14.10 %), silk productivity (2.405
cg/day), filament length (353.14 m), finer filament denier (1.62), pupal weight (1.103
g), pupation rate (93.24 %), moth emergence (94.29 %), fecundity (456.33) and
hatchability (98.03 %). Minimum third, fourth and fifth instar larval duration (3.99,
4.10 days and 7.21 days, respectively), larval mortality (0.67 %) and defective
cocoons (0.67 %) were also observed with the same variety. The correlation studies
shows that, as chemical composition of mulberry leaf increases the larval, cocoon and
grainage characters were also found to be improved except for crude fibre content.
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