Biology of Bihar hairy Caterpillar, Spilosoma obliqua Walker under laboratory conditions on mulberry
Author(s): Raksha Sharma CM, Shyla PN, Bhuvaneshwar Rajesh Naik, Anil Kumar U and Lavanya V
Abstract: Mulberry being the sole food for silkworm
Bombyx mori L. it is known to be attacked by many insect pests, of which the defoliating species are more predominant. The
Spilosoma obliqua Walker commonly known as Bihar hairy caterpillar or Jute hairy caterpillar is a polyphagous pest and is a threat to the mulberry yield. It is also a serious and destructive pest of various crops. To understand the duration of life cycle, longevity and fecundity of the insect, newly hatched larvae were separated from the stock culture. Five pairs of Bihar Hairy caterpillar adult moths were released into the cage for pairing and egg laying under controlled conditions (26±2 °C and 75 to 80% RH). The investigation was carried out during 2020-21 at the Department of Sericulture UAS, GKVK, Bengaluru-65 and revealed the
S. obliqua eggs incubation period was about 4 to 6 days with an average of 5.0±1.00. The hatching percentages were found to be of 88.25 to 94.25 with an average of 91.9±3.19. The duration of first, second, third, fourth, fifth and sixth instar were 3.31 to 4.82 days with an average of 3.85±0.84days., 2.21 to 2.39 days with an average of 2.27±0.20days, 2.29 to 5.43 days with an average of 4.30±0.10days, 3.41 to 3.61 days with an average of 3.50±0.10 days and 5.40to 5.60 days with an average of 5.50±0.10days, respectively. The pupal period was 10.61 to 12.62 days with an average of 11.5±1.03 days, The data on longevity of female moths were found in the range of 4.21 to 4.48 days with an average of 4.31±0.1days, while in case of male moths it was found to be of 3.33 to 3.52 days with an average of 3.42±0.1. days the average fecundity of adult female was 620 to 900 with an average of 740±14.22.
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How to cite this article:
Raksha Sharma CM, Shyla PN, Bhuvaneshwar Rajesh Naik, Anil Kumar U, Lavanya V. Biology of Bihar hairy Caterpillar, Spilosoma obliqua Walker under laboratory conditions on mulberry. Int J Multidiscip Trends 2023;5(11):40-43.