LARVICIDAL EFFICACY OF MUKIA MADERASPATANA AGAINST GRYLLOTALPA AFRICANA
K. Tharmendira, V. Ramamurthy* and S. Raveendran
ABSTRACT
Gryllotalpa africana is a macroinvertebrates and the characteristics of soil habitat have reciprocal influences on one another. Insects such as mole crickets (Orthoptera: Gryllotalpidae) spend virtually of all their lives in the soil. The application of easily degradable plant compounds is considered to be one of the safest methods to control insect pests and vectors as an alternative source for the synthetic pesticides. The study indicated that essential compounds were the only chemical used for the control of mosquito larvae while extract was used as the control of adult mosquitoes. The essential compounds were extracted by steam distillation and their chemical composition determined by Gas-chromatography coupled to mass spectroscopy. A study was made to monitor the effect of plant extracts on different instars of larvae and pupae of mosquito vector G. africana. Bio-assay was made using the solvent acetone to find out the median lethal concentration. Mukia maderaspatana which possess insecticidal properties are seemed to be better vector control agents than the synthetic xenobiotics. These results suggest a potential utilization of the extracts of these Mukia maderaspatana species for the control of G. africana.
Keywords: Gryllotalpa africana, insecticide, larvicidal activity, Mukia maderaspatana.
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