Larvicidal activity of Emphasis Type="Italic"Sol

Authors: Nandita Chowdhury Soroj Kumar Chatterjee Subrata Laskar Goutam Chandra

Publish Date: 2008/08/22

Volume: 82, Issue: 1, Pages: 13-18

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Abstract

Chloroformmethanol extract of mature leaves from Solanum villosum Mill Solanaceae Solanales was investigated to establish its biocontrol potentiality under laboratory condition against larval forms of Anopheles subpictus Grassi Diptera Culicidae the vector of human malaria All the graded concentrations 30 50 100 and 200 ppm showed significant P  005 larval mortality and results of regression equations revealed that the mortality rates were positively correlated with the concentrations of the extract R 2 close to 1 LC50 values for all instars were between 2420 and 3373 ppm after 24 h and between 2347 and 3063 ppm after 48 h of exposure period Significant changes in the larval mortality F  005 was also recorded between instars during single “ANOVA” analysis This extract also demonstrated no toxicity to larvae of Chironomus circumdatus Kieffer Diptera Chironomidae which were found to be present as most common nontarget dipteran insect in the habitats of A subpictus Qualitative and chromatographic analysis of the solvent extract revealed the presence of carbohydrates saponins terpenoids volatile oil steroids phenols and flavonoids as major bioactive phytochemicalsAuthors thank DSTFIST for providing insect culture laboratory facility for preparation of mosquito larvae for the entire study Authors also thankful to plant taxonomist Dr G G Maity Department of Botany Kalyani University Kalyani WB for identifying the plant

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