Author(s):

DK Hadimani, MC Devaiah, KC Narayanaswamy, RN Bhaskar, Radha D Kale and KR Shreeramulu

Abstract: Silkworm Bombyx mori L. is highly susceptibility to grasserie disease caused by Bombyx mori nuclear polyhedrosis virus (BmNPV). The amount of food ingested due to BmNPV infection during fourth instar was significantly maximum in CSR2 (225.56 g/100 larvae) followed by PM × CSR2 (219.33 g/100 larvae, while significantly lowest food consumption was recorded in BL43 (191.58 g/100 larvae) followed by MH1 (194.95 g/100 larvae). Among the PIBs concentrations, the amount of food ingested was significantly maximum in 10-6 PIBs (207.25 g/100 larvae) which was on par with 10-3 PIBs (206.74 g/100 larvae) compared to control (214.71 g/100 larvae).whereas, the amount of food ingested during fifth instar, the food ingested was significantly maximum in CSR2 (1057.36 g/100 larvae), which was on par with that of PM × CSR2 (1050.12 g/100 larvae). Among the PIBs concentrations, the food ingested was significantly maximum at 10-6 (1252.29 g/100 larvae) followed by 10-3 PIBs (1158.12 g/100 larvae) compared to the control (651.75 g/100 larvae). Similarly, The food digestion was significantly maximum in CSR2 (180.03 g/100 larvae), which was on par with PM × CSR2 (179.05 g/100 larvae) and MH1 × CSR2 (179.05 g/100 larvae). It was significantly minimum in BL43 (160.35 g/100 larvae).The food digestion was maximum in CSR2 × CSR4 (838.85 g/100 larvae) followed by PM × CSR2 (834.08g / 100 larvae) and MH1 × CSR2 (834.44 g/100 larvae). It was minimum in MH1 (797.25 g / 100 larvae) followed by BL43 (798.33 g/100 larvae).

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