Larvicidal effect of crude extracts of some marine plants (mangrove and seagrasses) on mosquitoes of Culex pipiens

Document Type : Original Article

Authors

1 Marine Sciences Department, Faculty of Sciences, Suez Canal University, Ismailia, Egypt. 2- Department of biology, Almadinah Almonawara, Taibah university, Kingdom of Saudi

2 Marine Sciences Department, Faculty of Sciences, Suez Canal University, Ismailia, Egypt.

3 Marine Sciences Department, Faculty of Sciences, Suez Canal University, Ismailia, Egypt

Abstract

Marine halophytes (mangroves and sea grasses) were collected from the Red Sea coast of Egypt and tested for their mosquitocidal activities. The toxicities of mangroves Avicennia marina & Rhizophora mucronata, and seagrasses
Thalassodendron ciliatum, Halodule uninervis and Halophilia stipulacea were examined against lab. Strain of 3rd instar larvae of Culex pipiens. Results showed that extracts of seeds and leaves of Avicennia marina were more effective than other parts of the same plant as well as of the leaves of Rhizophpra mucronata against 3rd instar larvae of Culex pipiens mosquito. On the other hand, comparison of the toxicities of the three species of sea grasses showed that crude extract of Halodule uninervis was more active against 3rd instar larvae of mosquito Cu pipiens than crude extracts of
Thalassodendron Ciliatum and Halophilia stipulacea. In view of these results, the purified active compounds from the most effective samples found in our studies could be effective in killing mosquito larvae or repelling adult female mosquitoes in an economic and safe manner.

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Egyptian Journal of Aquatic Biology and Fisheries
Volume 16, Issue 2
May and June 2012
Pages 99-105

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