小菜蛾对杀螟丹抗性遗传的研究

GENETIC ANALYSIS OF CARTAP RESISTANCE IN DIAMONDBACK MOTH, PLUTELLA XYLOSTELLA (L )

利用室内选育的抗杀螟丹小菜蛾Ｐｌｕｔｅｌａｘｙｌｏｓｔｅｌａ（Ｌ）品系和敏感品系研究了该品系的抗性遗传形式，结果表明，小菜蛾对杀螟丹的抗性形式为常染色体多基因遗传，并呈不完全显性。该品系对６种常用杀虫剂的抗性谱测定结果表明，对杀虫双有较严重的正交互抗性；对敌敌畏、杀扑磷有低度交互抗性；对溴氰菊酯、灭多威和叶蝉散等药剂无交互抗性。还发现该品系对杀螟丹的抗性与乙酰胆碱酯酶和羧酸酯酶活性无关。

The inheritance of resistance to cartap in diamondback moth Plutella xylostella (L )is evaluated from the response of fourth instar larvae to cartap treatment The insects used for the study are taken from laboratory reared resistant and susceptible strains The results of genetic analysis indicate that cartap resistance in the diamondback moth (DBM) appears to be controlled by two or more autosomal genes and the major gene(s) involved is incompletely dominant The sensitivites of cartap resistant strains to 6 insecticides have been tested The results show that the resistant strain has marked cross resistance to dimehypo and slight cross resistance to DDVP and methidathion, but no cross resistance to deltamethrin, methomyl and mipcin The results of study on activities of AChE and CarE show that the resistance of the DBM larvae to cartap is not related to AChE or CarE