Efficacy of Botanical Extracts on Biological Activities of Pulse Beetle Callosobruchus maculatus (Fab.) on Green Gram
2011
At all the interval of post treatment, petroleum ether extract of Margosa seed, in general, showed maximum oviposition deterrent activity against C. maculatus as it recorded maximum reduction in oviposition, followed by Margosa seed ethanol extract and Margosa leaf petroleum ether extract. The differences in the adult emergence due to plant extracts were significant at each interval of post treatment. Percentage reduction in adult emergence continuously decreased up to 90 days, post treatment under all botanical treatments. At one day after treatment, reduction in adult emergence varied from 25.50 to 65.10%, whereas, it was 6.63 to 25.90% at 90 days after treatment. Petroleum ether extract of Margosa seed showed significantly maximum ovicidal activity (36.21%) against C. maculatus followed by ethanol extract of Margosa seed (27.59%). The developmental period (eggs to adult) ranged from 26.13 to 28.14 days, however, it did not exhibit significant difference among various plant extracts.
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