Vol. 8, Special Issue 4 (2020)
Effect of Per-oral inoculation of BmCPV and flacherie bacterial isolates on rearing parameters of silkworm, Bombyx mori L. (PM×CSR2)
Author(s): M Chandana, RN Bhaskar, Fatima Sadatulla
Abstract: Flacherie is considered to be a major disease in silkworm and it is a condition in which worm becomes flaccid and suffer from vomiting and dysentery. The disease is common, during summer and rainy seasons in all the sericultural areas of Karnataka and it is caused by different species of bacteria, viruses and their mixed infections. Per oral inoculation of different pathogenic bacteria viz., Acinetobacter baumannii (A), Bacillus pumilus (Bp), Bacillus licheniformis (Bl) and CPV (C) revealed significant in per cent reduction in larval weight over sterile water control, larval duration (days), moulting duration (hours) and per cent worms entering to subsequent instar. The maximum per cent larval weight reduction (43.50%), total larval duration (21.55 days), total moulting duration (107.12 h) and least per cent worms entering to subsequent instar (42.67%) was recorded in four organism treatment combination (T7). Whereas, the minimum per cent larval weight reduction (19.62%), total larval duration (18.88 days), total moulting duration (80.94 h) and highest per cent worms entering to subsequent instar (90.00%) was noticed in T1 in third instar inoculated batch. While the same trend was recorded in fourth and fifth instar inoculated batches. Irrespective of the group of bacterial isolate administered, more reduction in all the rearing parameters was observed in the silkworm batch inoculated with four organisms (T7), followed by triple inoculation (T4,5,6and less reduction was recorded in dual inoculated (t1,2,3) batches.
DOI: 10.22271/chemi.2020.v8.i4b.9876
Pages: 105-109 | 707 Views 51 Downloads
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How to cite this article:
M Chandana, RN Bhaskar, Fatima Sadatulla. Effect of Per-oral inoculation of BmCPV and flacherie bacterial isolates on rearing parameters of silkworm, Bombyx mori L. (PM×CSR2). International Journal of Chemical Studies. 2020; 8(4): 105-109. DOI: 10.22271/chemi.2020.v8.i4b.9876
