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Biological Control of Key Pest of Jute, Spilosoma obliqua Walker (Lepidoptera: Arctiidae)-A Case Study


Affiliations
1 ICAR- Central Research Institute for Jute and Allied Fibres, Barrackpore, Kolkata – 700120, West Bengal, India
2 ICAR- National Bureau of Agricultural Insect Resources, H. A. Farm Post, Bellary Road, Hebbal, Bangalore – 560024, Karnataka, India
 

Surveys were conducted in intensive jute growing areas of West Bengal to collect information on natural enemies and other entomopathogens infecting jute hairy caterpillar Spilosoma obliqua (Lepidoptera: Arctiidae). The jute crop supports large number natural enemies of S. obliqua and entomopathogens. Among the braconid larval parasitoids, Meteorus spilosomae (Hymenoptera: Braconidae) and Protapantales obliquae (Hymenoptera: Braconidae) were the key mortality factors. The activity of these parasitoids was noticed from mid- May to mid-July during the cropping season. The parasitoid, P. obliquae is a gregarious, endoparasitoid specific to S. obliqua and parasitize to the extent of 38% up to third instar of larvae whereas M. spilosomae reported to cause up to 77% of parasitisation on S. obliqua under field condition. Bacillus thuringiensis and nuclear polyhedrosis virus were found be very effective with mortality of, 64 and 93% respectively. These parasitoids and pathogens can be used as potential bio-control agents against jute hairy caterpillar through conservation, augmentation and mass multiplication.


Keywords

Biocontrol, Jute, Natural Enemies, Spilosoma obliqua.
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  • Biological Control of Key Pest of Jute, Spilosoma obliqua Walker (Lepidoptera: Arctiidae)-A Case Study

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Authors

B. S. Gotyal
ICAR- Central Research Institute for Jute and Allied Fibres, Barrackpore, Kolkata – 700120, West Bengal, India
V. Ramesh Babu
ICAR- Central Research Institute for Jute and Allied Fibres, Barrackpore, Kolkata – 700120, West Bengal, India
S. Satpathy
ICAR- Central Research Institute for Jute and Allied Fibres, Barrackpore, Kolkata – 700120, West Bengal, India
K. Selvaraj
ICAR- National Bureau of Agricultural Insect Resources, H. A. Farm Post, Bellary Road, Hebbal, Bangalore – 560024, Karnataka, India

Abstract


Surveys were conducted in intensive jute growing areas of West Bengal to collect information on natural enemies and other entomopathogens infecting jute hairy caterpillar Spilosoma obliqua (Lepidoptera: Arctiidae). The jute crop supports large number natural enemies of S. obliqua and entomopathogens. Among the braconid larval parasitoids, Meteorus spilosomae (Hymenoptera: Braconidae) and Protapantales obliquae (Hymenoptera: Braconidae) were the key mortality factors. The activity of these parasitoids was noticed from mid- May to mid-July during the cropping season. The parasitoid, P. obliquae is a gregarious, endoparasitoid specific to S. obliqua and parasitize to the extent of 38% up to third instar of larvae whereas M. spilosomae reported to cause up to 77% of parasitisation on S. obliqua under field condition. Bacillus thuringiensis and nuclear polyhedrosis virus were found be very effective with mortality of, 64 and 93% respectively. These parasitoids and pathogens can be used as potential bio-control agents against jute hairy caterpillar through conservation, augmentation and mass multiplication.


Keywords


Biocontrol, Jute, Natural Enemies, Spilosoma obliqua.

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DOI: https://doi.org/10.18311/jbc%2F2019%2F22986