Modulations in the developmental rate of parasitoid, Habrobracon hebetor exposed to Bacillus thuringiensis during biocontrol of rice moth, Corcyra cephalonica
Department of Zoology, St Andrews College, Gorakhpur, Uttar Pradesh, India.
Case Study
World Journal of Advanced Research and Reviews, 2023, 18(01), 1301-1306
Publication history:
Received on 11 March 2023; revised on 24 April 2023; accepted on 28 April 2023
Abstract:
The sublethal effect of Bacillus thuringiensis (Bt) on the developmental parameters of Habrobracon hebetor was assessed during combined biocontrol of stored grain pest, Corcyra cephalonica. All stages, except the incubation period, were significantly affected. Correlations were studied between the modulations in developmental rates due to different Bt treatments. Correlation for development on host larvae reared on Bt LC10 diet was highest (r=.998, p<.01) with that of the untreated control. H. hebetor was more affected by acute LC50 and direct ingestion of Bt, than long-term low concentration exposure. The correlation between the effects of acute exposure and direct ingestion was in fact very high (r=.999, p<.01). The experiment illustrates the desirability of using low concentration of the biopesticide in long-term strategy. The study will help to evaluate the use of biocontrol agents in combination with Bt to formulate effective strategies for the efficient management of stored product pests like C. cephalonica.
Keywords:
Bacillus thuringiensis; Habrobracon hebetor; Corcyra cephalonica; Combined biocontrol; Developmental rates
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