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Mosquito Larvicidal Activity of Marine Plant Extracts with Synthetic Insecticides

Mosquito Larvicidal Activity of Marine Plant Extracts with Synthetic Insecticides Two seaweeds, Caulerpa scalpelliformis, Dictyota dichotoma and one mangrove sample, stilt root of Rhizophora apiculata were extracted in acetone and were combined with synthetic insecticides, DDT, BHC and malathion and evaluated for mosquito larvicidal activity against Aedes aegypti. The extracts showed synergism with the insecticides. The stilt root of Rhizophora apiculata exhibited highest synergistic activity with BHC. Introduction The synthetic insecticides, DDT, BHC and malathion are commonly used in India in mosquito control programmes. However, these chemicals are well known to cause environmental pollution. To overcome this, natural insecticides of plant origin have been studied in recent years. In this context, marine plant extracts have been reported for the first time in our laboratory to have mosquito larvicidal activity (Subramonia Thangam and Kathiresan 1988a,b, 1989, 1991a,b). Terrestrial plant extracts, when combined with synthetic insecticides, have been reported to reduce the required insecticide dose and hence also reduce pollution. Such reports for marine plants are not available. The present study was carried out to evaluate the synergistic mosquito larvicidal activity of extracts of Caulerpa scalpelliformis, Dictyota dichotoma and Rhizophora apiculata -- stilt root in combination with DDT, BHC and malathion against Aedes aegypti L., the vector of dengue and http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Botanica Marina de Gruyter

Mosquito Larvicidal Activity of Marine Plant Extracts with Synthetic Insecticides

Botanica Marina , Volume 34 (6) – Jan 1, 1991

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References (9)

Publisher
de Gruyter
Copyright
Copyright © 2009 Walter de Gruyter
ISSN
0006-8055
eISSN
1437-4323
DOI
10.1515/botm.1991.34.6.537
Publisher site
See Article on Publisher Site

Abstract

Two seaweeds, Caulerpa scalpelliformis, Dictyota dichotoma and one mangrove sample, stilt root of Rhizophora apiculata were extracted in acetone and were combined with synthetic insecticides, DDT, BHC and malathion and evaluated for mosquito larvicidal activity against Aedes aegypti. The extracts showed synergism with the insecticides. The stilt root of Rhizophora apiculata exhibited highest synergistic activity with BHC. Introduction The synthetic insecticides, DDT, BHC and malathion are commonly used in India in mosquito control programmes. However, these chemicals are well known to cause environmental pollution. To overcome this, natural insecticides of plant origin have been studied in recent years. In this context, marine plant extracts have been reported for the first time in our laboratory to have mosquito larvicidal activity (Subramonia Thangam and Kathiresan 1988a,b, 1989, 1991a,b). Terrestrial plant extracts, when combined with synthetic insecticides, have been reported to reduce the required insecticide dose and hence also reduce pollution. Such reports for marine plants are not available. The present study was carried out to evaluate the synergistic mosquito larvicidal activity of extracts of Caulerpa scalpelliformis, Dictyota dichotoma and Rhizophora apiculata -- stilt root in combination with DDT, BHC and malathion against Aedes aegypti L., the vector of dengue and

Journal

Botanica Marinade Gruyter

Published: Jan 1, 1991

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