title: [The seasonal changes in the resistance and irritability to insecticides in malarial mosquitoes in Karakalpakia].
abstract: Primary observations on insecticide resistance and irritability in Anopheles martinius and An. pulcherrimus were carried out in Karakalpakia. Both the species were completely susceptible to malathion and fenitrothion, and An. pulcherrimus was also susceptible to propoxur and DDT. An. martinius had a moderate resistance to DDT, which decreased by the autumn, and initial stage of resistance to propoxur probably based on knockdown mechanism. In both the species irritability was to DDT high, and was lower to malathion, propoxur and especially fenitrothion. During the season, irritability to the four insecticides was decreasing in An. pulcherrimus, and in An. martinius; it was high in April but became moderate or low in July and then began to grow again reaching the initial high level in November. No relation between the seasonal changes of irritability and rounds of insecticide spraying was noticed. It is supposed that a genetically and physiologically stipulated mechanism of the seasonal variability of irritability exists in mosquito populations.
authors.forename: N N
authors.initials: NN
authors.lastname: Sorokin
authors.forename: T A
authors.initials: TA
authors.lastname: Adamishina
authors.forename: A P
authors.initials: AP
authors.lastname: Stepnov
authors.forename: V L
authors.initials: VL
authors.lastname: Ivanova
authors.forename: Iu V
authors.initials: IuV
authors.lastname: Ermishev
mesh_terms: D000818:Animals; D000852:Anopheles; D007305:Insecticide Resistance; D007306:Insecticides; D012621:Seasons; D014610:Uzbekistan
chemical_list: D007306:Insecticides
vernacular_title: Sezonnye izmeneniia rezistentnosti i razdrazhimosti k insektitsidam u maliariĭnykh komarov v Karakalpakii.