Abstract
On searching for bioinsecticides virulent to mosquito larvae; Culex pipiens, nineseaweeds species were screened. In this study, different dried seaweeds were appliedinto the mosquito larvae rearing jars. The effect of these seaweeds on the survival,larval development and growth rate of the mosquito Culex pipiens larvae wasmeasured. The percentage of dead larvae fed with seaweeds species after 10 and 15days were 50%, 90% respectively. Delayed pupation and body size reduction of themosquitoes larvae fed with seaweeds were observed. The study showed that Caulerpaprolifera, Caulerpa serrulata, Jania rubens, Nitophyllum punctatum, Cystoseiramyrica and Padina pavonica have potential to be used as larvicidal agents actingmainly to increase life cycle intervals and pupation delay.
Highlights
Mosquitoes serve as a vector of several diseases, causing serious health problems to human; they transmit diseases such as yellow fever, human lymphatic filariasis and malaria (Abdel-Hameed, et al, 1994)
Seaweeds are a fascinating and diverse group of organisms living in the earth's Seas and oceans
Marine plants are continuously being challenged by microorganisms and by grazers. It appears that this intense grazing has provided strong selection for seaweeds that synthesize unique secondary metabolites that significantly reduce the consumption of plants exposed to attack by a diverse group of reef herbivores (Hay, et al, 1987a & 1987b and Hay, 1988)
Summary
Screening of some seaweeds species from South Sinai, Red Sea as potential bioinsecticides against mosquito larvae; Culex pipiens.
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