Bioefficacy and reproductive potential of a native entomopathogenic nematode against Pieris brassicae under laboratory conditions

Abstract : Efficacy of a native entomopathogenic nematode, Heterorhabditis casmirica SKUAST-K 104 was tested against cabbage butterfly, Pieris brassicae under laboratory conditions. Larval mortality increased with the increase in time period and inoculum level of nematode. Highest mortality percentage of larva was achieved with the inoculum level of 100 infective juveniles (IJs) followed by 75, 50 and 25 IJs. The mortality rate of larva was size dependant. Median lethal concentration (LC 50) values were found highest for 5th instar larvae followed by 4th and 3rd instar larvae. Similarly, median lethal time (LT 50) values were calculated higher for 5th instar larvae followed by 4th and 3rd instar larvae. Yield of IJs was directly proportional to larval size. Average yield of infective juveniles per larva was maximum from 5th instar and minimum from 3rd instar larva.
Keyword : Entomopathogenic nematode, reproductive potential, strain, infective juvenile, larva, cabbage butterfly
Author(s) : Dass, W. M., Tak, H., Askary, T. H., Malik, I. M., Andrabi, A.
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Published Issue : 2024 Vol. 19 Number 1

2024 Vol. 19 Number 1