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INSECTICIDAL ACTIVITIES OF ABROMA AUGUSTA (L.) CHLOROFORM AND METHANOL EXTRACTS AGAINST TRIBOLIUM CASTANEUM (HERBST) ADULTS
By: Omar Ali Mondal, Esarul Haque, Jahurul Haque, Ataur Rahman Khan
Key Words: Abroma augusta, Insecticidal activity, Chloroform and methanol extracts, Tribolium castaneum.
JLES-Vol-8-No-P-11-15, December 2013
AbstractThe chloroform and methanol extracts of the leaves, root wood, stem bark, stem wood and seeds of Abroma augusta (L.) (Ulatkambal) were tested against Tribolium castaneum (Herbst) adults through residual film assay. The seed extracts (CHcl3 and MeOH) were found to offer the highest mortality of the beetles and the LD50 values were 3046.083, 247.9217 and 75.96001 µg/cm2 and 6598.793, 340.4855 and 113.6461 µg/cm2 for the (CHCl3 and MeOH) extracts for 30min, 24 and 48h of exposures respectively. The root wood extracts gave LD50 values of 1127.785, 312.5822 and 146.3708 µg/cm2 and 1689.468, 449.8259 and 134.9692 µg/cm2 for the (CHCl3 and MeOH) extracts for 30min, 24 and 48h of exposures respectively. These were followed by the leaf (CHCl3 and MeOH) extracts that gave LD50 values of 3466.807, 450.3049 and 175.7438 µg/cm2 and 4654.238, 1010.538 and 333.7202 µg/cm2 for the(CHCl3 and MeOH) extracts for 30 min, 24h and 48h of exposure respectively. The stem bark extracts(CHCl3 and MeOH) gave LD50 values of 3295.859, 1137.558 and 363.1539 µg/cm2 and 3717.851, 566.2215 and 230.7044 µg/cm2 for the (CHCl3 and MeOH) extracts for 30 min, 24 and 48 h of exposure respectively. The stem wood extracts (CHCl3 and MeOH) of A. augusta did not show any activity against the beetles. According to the intensity of activity observed through mortality of the adult beetles the potentiality of the chloroform extracts could be arranged in a descending order of seeds> root wood > leaf> stem bark and for the methanol extracts, seed>root wood > stem bark > leaf.
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Manuscript received on 9 July 2013 and revised on 9 November 2013
Omar Ali Mondal, Esarul Haque, Jahurul Haque, Ataur Rahman Khan
INSECTICIDAL ACTIVITIES OF ABROMA AUGUSTA (L.) CHLOROFORM AND METHANOL EXTRACTS AGAINST TRIBOLIUM CASTANEUM (HERBST) ADULTS
JLES-Vol-8-No-P-11-15, December 2013
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