نتایج جستجو برای: aedes larvae
تعداد نتایج: 41770 فیلتر نتایج به سال:
Laboratory reared larvae of Toxorhynchites splendens, which were previously starved for 24 hours, cannibalized eggs of their own kind or preyed upon the eggs of other species (Aedes aegypti and Anopheles stephensi) present on the surface of water in small containers. Second and third instars consumed eggs faster than first and fourth instars. The first instar consumed larvae of its own kind fas...
[Occurrence of Aedes scapularis (Diptera:Culicidae) in artificial breeding area of southern Brazil].
Two larvae of Aedes scapularis were found in an artificial breeding site, in the Sertaneja County, North of the Paraná State, South Brazil, in the course of routine work for the control of dengue vectors. Aedes. Ecology, vectors. Rev. Saúde Pública, 30 (1): 103-4, 1996 103 104 Rev. Saúde Pública, 30 (1) 1996 Aedes scapularis em criadouro artificial Silva, A. M. da & Menezes, R. M. T. de posição...
An experimental Sandoz formulation of Bacillus thuringiensis var. israelensis (SAN 402 SC 98) was several times more effective than Abbott ABG 6188 against larvae of Aedes aegypti and Ae. vexans in the laboratory. Field applications of SAN 402 SC 98 at 0.25 liter/ha and ABG 6188 at 1.00 liter/ha resulted in more than 97% control of Ae. vexans larvae after 48 hours, with residual activity of 24 ...
Most kinds of phytoplankton are good food for mosquito larvae. However, Culex, Aedes and Anopheles larvae fail to develop successfully in water where certain species of closely related green algae in the order Chlorococcales are the main source of food; apparently because the larvae are unable to digest them. Many species of Scenedesmus, Kirchneriella, Dactylococcus, Elakotothrix, Tetrallantos,...
The aim of this study was to determine the potency (ITU) and efficacy of a liquid formulation of Bacillus thuringiensis israelensis developed by the State University of Londrina named BioUel, against early fourth instar larvae of Aedes aegypti and Culex quinquefasciatus. The ITU/mg of BioUel was 960, the LC₅₀ was of 0.271 (± 0.39) ppm, and the LC₉₅ was 0.634 (± 0.099) ppm, in larvae of C. quinq...
Between May 18 and December 4, 1986, 79 seagoing containers and their contents of 22,051 used tires were inspected for adult mosquitoes as well as eggs and larvae. Of the total inspected, 5,507 tires (25%) contained significant amounts of water. No adults or eggs were found. Fifteen tires contained mosquito larvae that were identified as Ae. albopictus, Ae. togoi, Culex pipiens complex, Tripter...
The effect of phenobarbital (PB) on the induction of tolerance to the organophosphorous insecticide temephos (TE) was investigated in Aedes aegypti L4 larvae submitted to two different PB-treatments:(1) continuous treatment from the egg to the larval L4 stage and (2) discontinuous treatment in which L4 larvae were exposed for 30 h. Mosquitoes from two Brazilian cities were studied: São José do ...
Mosquito larvae were collected from the houses of dengue infected patients in Bangkok, Thailand from 55 sites (36 out of the 50 districts of Metropolitan Bangkok). Aedes aegypti larvae were tested against temephos using WHO bioassay techniques. Adult mosquitoes were tested for susceptibility to permethrin, deltamethrin, cyfluthrin, malathion and DDT using WHO diagnostic doses. Most of the larva...
Entomopathogenic bacteria isolated from Simulium larvae and adults from breeding sites in the states of São Paulo and Rio de Janeiro, Brazil, were identified as 18 strains of Bacillus thuringiensis and one of B. sphaericus. Most of these strains were serotyped according to their flagellar antigens. However, nine of the B. thuringiensis samples, could not be serotyped and were designated as "aut...
Mechanisms by which an introduced container-dwelling mosquito, Aedes albopictus, may cause declines in a resident container-dwelling mosquito, Aedes aegypti, in South Florida were tested using a combination of field experiments and field observations. Field experiment 1 tested which species has a competitive advantage as larvae developing in water-filled tires. Densities and availability of res...
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