PER ORAL INOCULATION OF BACILLUS SPECIES (SURFACE AND MIDGUT FLORA) ON LARVAL WEIGHT OF PM AND CSR2

Abstract

The larval weight of third and fourth instar of PM and CSR2 revealed, significantly mean larval weight of 5.65 and 10.77 g/10 was noticed due to Per oral inoculation of Bacillus species in the beginning of the healthy lots of third instar on contrary, the same instar with surface Bacillus infection recorded 4.27 and 9.84 g/10 larval weight at the beginning. However, the trend was same even in fourth instar inoculated batches 2.46 and 6.94 g/10, 13.83, 6.94 and 1.92 ,5.43 and 10.26 6.34 g/10 in PM and CSR2 larval weight. Further the mean larval weight of 5.68 and 10.52 g/10 was noticed in the beginning of the healthy lots of third instar on contrary, the same instar with midgut flora recorded 4.26 and 9.74 g/10 larval weights at the beginning. The mean weight of 1.58 to 1.18 and 1.26, to1.05 was recorded for third instar inoculated batch which was found to be lower than fourth and fifth instar lots in both PM and CSR2 breeds of respectively. It is concluded that, per oral infection of surface and midgut flora of Bacillus resulted decreased larval weight both in beginning and end of the fourth instar inoculated batch.