Written by G.Chandra, S.N.Chatterjee and A.Ghosh
Abstract. Influenza A (H5N1) human cases started to be reported since 1997. In Indonesia, the first human cases were reported in July 2005, as a cluster consisted of a father and two daughters; two of them were fatal confirmed cases. As of 31 October 2006, 72 cases have been identified (25 were classified into 10 clusters) with a case fatality rate (CFR) of 76.4%. The Abstract. The failure of traditional vector control operations through chemical insecticides renewed interest in biological control method. In the present study Dragonfly (Brachytron pratense) nymph has been proved to be a strong biocontrol agent of Anopheles subpictus larvae in the laboratory condition. Average daily larval feeding rate of B. pratense nymph decreased when the search area was increased. Feeding rate increased when prey density was increased. In the field conditions also, B. pratense played very effective role as predator of different species of larval mosquitoes.
Keywords: Brachytron pratense, nymph, mosquitoes, biocontrol, search area, prey, predator.
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