Susceptibility of Aedes aegypti to some insecticides in different geographic areas was conducted during dengue and chikungunya outbreak. At present, the only method of preventing dengue and ...chikungunya is to control the vector, which is the weakest link in vector-borne diseases. In our study, the susceptibility of A. aegypti collected from urban areas of Delhi, Mumbai, Jodhpur, Chennai and Coimbatore was evaluated against temephos, fenthion, malathion and DDT. The A. aegypti from different locations exhibited 0.33-7.11, 0.36-3.00, 0.65-2.84 and 2.16-20.8 fold more lethal concentration value of 50% (LC50) to temephos, fenthion, malathion and DDT, respectively, compared to susceptible reference strain. The result reveals that A. aegypti from various locations studied are still susceptible to temephos, fenthion and malathion, whereas low level of DDT resistance was noticed in field-collected A. aegypti. Amongst the insecticides tested, temephos was found to be relatively more effective in controlling A. aegypti, followed by fenthion, malathion and DDT.
<正>Objective:To characterize the genetic structure of various populations of Culex quinquefasciatus (Cx.quinquefasciatus) from India representing different geoclimatic locations.Methods:Inter ...simple sequence repeat(ISSR) markers were used.A set of 20 primers were screened with the laboratory populations of mosquito species.Finally the IS 40 primer was chosen based on the scorable banding pattern showing 100 percent polymorphism among the various populations.The statistical analysis was done using POPGENE 1.31 software.The consensus tree was generated based on UPGMA modified from NEIGHBOR procedure of PHYLIP Version 3.5.Results:The cluster analysis shows the main cluster which is divided into two sub cluster representing all the populations separated as per their phylogeographic and geoclimatic condition.Conclusions: The findings will be helpful in understanding the population variation under different ecological conditions and development of effective vector management strategies.
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