Mosquito larvae Anopheles

A fine mesh wire screen was then fitted over the tanks to confine the larvae on the plants. The caterpillars consumed the plants within 3 to 4 days and contaminated the water with their excreta and leaf frass. In their search for more food, the caterpillars also ended up contaminating the water themselves. Approximately 300 mosquito larvae (Anopheles quadrimaculatus) were added to the ecosystem after 26 days and 4 days later 50 were removed for... 

Larvae of the yellow fever mosquito, which are shallow feeders, were reared at room temperature by methods similar to those used in culturing Anopheles mosquito larvae (2, 6). Filter papers containing the eggs (furnished through the courtesy of R. E. Heal, Merck Co., Inc., Rahway, N. J.) were placed in tap water in shallow porcelain pans (12 X 7 inches, and 2 inches deep). The eggs hatched within 24 hours. When the larvae had hatched, powdered dog biscuit was added daily at the rate of 100 mg. per liter of water. 

Mohanty et al. (2008) studied the efficacy of the virulent M. anisopliae strain 892 -isolated from Pyrausta nubilalis - against mosquito larvae. LC50 values of M. anisopliae 892 for Culex quinquefasciatus, Anopheles stephensi and Aedes aegypti were examined. M. anisopliae 892 was found to cause approximately 50% mortality of C. quinquefasciatus 4 days post inoculation. The production of subtilisin-like (Prl) and trypsin-like protease (Pr2) was measured in the presence of certain inducers. Significant differences in the production of Prl and Pr2 were found following the addition of inducers i.e. cuticles of the three... 

Edwards MJ, Jacobs-Lorena M. Permeability and disruption of the peritrophic matrix and caecal membrane from Aedes aegypti and Anopheles gambiae mosquito larvae. J. Insert Physiol. 2000, 46, 1313-1320. 

Silva-Filha, M. H. Nielsen-Leroux, C. Charles, J. F. Binding kinetics of Bacillus sphaericus binary toxin to midgut brush-border membranes of Anopheles and Culex sp. mosquito larvae. Eur. J. Biochem. 1997 247, 754-761. 

M. J. Perich et al. Toxicity of extracts from three Tagetes against adults and larvae of yellow fever mosquito md Anopheles stephensi (Diptera Culicidae). J Med Entomol, 31, 833, 1994. 

Some species of mosquitos in the genera Anopheles, Aedes, and Culex are responsible for infecting human beings with diseases such as malaria, filariasis, and yellow fever. While pest flies carry diseases to humans and animals and cause a considerable loss to agricultural crops, their larvae also serve an important function in the process of decomposing dead plant and animal material, a role they share with many bacteria and fnngi. Mosquito populations are a part of this process. 

The extracts also showed useful effects at lower concentrations. It was observed that 20-40% of the larvae treated with the low concentration of the extract successfully pupated but often died before emerging into adults. This is no disadvantage for malaria control programmes since it is the adult Anopheles gambiae mosquitoes that are the prime vectors of the disease. 

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