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ESTERASE PHENOTYPES IN NATURAL POPULATIONS OF CULEX PIPIENS PALLENS (DIPTERA: CULICIDAE) AND THEIR VARIATIONS UNDER INSECTICIDE SELECTION *
Author(s) -
Jinfu WANG
Publication year - 2000
Publication title -
insect science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 45
eISSN - 1744-7917
pISSN - 1672-9609
DOI - 10.1111/j.1744-7917.2000.tb00418.x
Subject(s) - esterase , biology , malathion , phenotype , culex pipiens , chlorpyrifos , population , genetics , zoology , gene , pesticide , ecology , enzyme , biochemistry , larva , demography , sociology
Three populations of Culex pipiens pallens Coquillett, from Hangzhou, Linhai and Jinhua, were determined for their probability of resistant esterase phenotypes. Further, each population was selected with dipterex, chlorpyrifos, temephos and malathion at a given dose of 60%‐70% mortality and was determined for the variation of resistant esterase phenotypes in its offspring. The results indicated that esterase B 1 phenotype was dominant in three populations although different natural populations have a different probability distribution of esterase B phenotypes. Insecticide selection showed that various esterase loci seemed to have different selective advantages under different insecticide pressures. The esterase B 1 phenotype was selected under temephos, and the esterase B 2 phenotype was selected under dipterex and chlorpyrifos. Except for the esterase B 1 phenotype, the heterozygote of B 1 /B 2 phenotypes was detected under malathion pressure. These results are discussed in relation to the selective advantages of esterase genes to OP pressure and mosquito control strategies.