| Abstrakt: |
An experiment was carried out at Department of Sericulture, UAS, GKVK, Bengaluru to know the effect of foliar application of different volumes of nano nitrogen on growth and yield of mulberry and its subsequent effect on silkworm Bombyx mori L. (FC1 X FC2). The study resulted in significant improvement in silkworm (FC1 x FC2), when fed with mulberry leaves raised with different volumes of nano nitrogen fertilizer. Significantly shorter fifth instar larval duration (8.67 days), higher fifth instar larval weight (36.65 g/10 larvae) and better ERR (100 %) were observed from the silkworm batches fed with leaves harvested from mulberry plants raised with foliar application of 0.4% nano nitrogen fertilizer @ 225 ltr per acre on 25th day after pruning + 50% soil application of N, which was on par with silkworm batches fed with leaves harvested from mulberry plants raised with foliar application of 0.4% nano nitrogen fertilizer @ 200 ltr per acre on 25th day after pruning + 50% soil application of N showing shorter fifth instar larval duration (8.67 days), higher fifth instar larval weight (36.07 g/10 larvae) and better ERR (100 %). The cocoon parameters of silkworm (FC1 x FC2) viz., cocoon yield by weight (22.62 kg/10,000 worms), cocoon yield by number (10,000 / 10,000 worms), cocoon weight (2.26 g), cocoon shell weight (0.50 g), pupal weight (1.77 g), cocoon shell ratio (21.90 %) and reeling parameters viz., average filament length (1280.46 m) and non-breakable filament length (1251.01 m) were significantly superior in the silkworm groups fed with leaves harvested from mulberry plants raised with foliar application of 0.4% nano nitrogen fertilizer @ 225 ltr per acre on 25th day after pruning + 50% soil application of N, which was on par with the silkworm batches fed with leaves harvested from mulberry plants raised with foliar application of 0.4% nano nitrogen fertilizer @ 200 ltr per acre on 25th day after pruning + 50% soil application of N showing cocoon yield by weight (22.50 kg/10,000 worms), cocoon yield by number (10,000 / 10,000 worms), cocoon weight (2.25 g), cocoon shell weight (0.48 g), pupal weight (1.77 g), cocoon shell ratio (21.45 %) and reeling parameters viz., average filament length (1232.10 m) and non-breakable filament length (1197.60 m). [ABSTRACT FROM AUTHOR] |
