The dusky cotton bug (DCB), Oxycarenus hyalinipennis Costa (Hemiptera: Lygaeidae) is one of the most important pests of cotton. Fipronil belongs to phenylpyrazole and is being used against various insect pests. To reduce the resistance to this insecticide, the present study was planned to examine the inheritance mode and preliminary mechanism of resistance to fipronil in DCB. A fipronil selected strain had a 9855-fold level of resistance after 11 generations of selection with fipronil. The median lethal concentration of reciprocal crosses F₁ (Fipro-Sel.♂×Lab-Pop♀) and F₁^-(Fipro-Sel.♀× Lab-Pop♂) showed no significant difference and degree of dominance values were 0.60 and 0.58 for F1 and F1^-), respectively, suggesting autosomal and incompletely dominance of resistance to fipronil in fipronil selected strain of DCB. Monogenic model of inheritance revealed polygenic resistance to fipronil. Realized heritability (h²) value was 0.24 for fipronil resistance. The study of synergism indicated that PBO (Piperonyl butoxide) and DEF (S, S-butyl phosphorotrithioateases) did not enhance the toxicity of fipronil on both populations.

The study on inheritance mode of fipronil resistance in DCB may help delay the resistance with insecticides.

朦胧的棉虫（DCB），Oxycarenus hyalinipennis Costa（半翅目：Lygaeidae）是棉花最重要的害虫之一。氟吡尼属于苯基吡唑，并用于对抗各种害虫。为了降低对这种杀虫剂的抗性，本研究计划研究DCB对氟虫腈的抗性的继承模式和初步机理。在选择氟虫腈11代后，选择氟虫腈的菌株的抗性水平为9855倍。正反交的半数致死浓度˚F ₁（Fipro-Sel.♂×实验室Pop♀）和F ₁ ^-（Fipro-Sel.♀×实验室Pop♂）显示没有差异显著和显性值的程度分别为0.60和0.58 F1和F1 ^-），分别表明在氟虫腈选择的DCB菌株中对氟虫腈的抗性的常染色体和不完全优势。遗传的单基因模型揭示了对氟虫腈的多基因抗性。氟虫腈抗性的实现的遗传力（h ²）值为0.24。对协同作用的研究表明，PBO（戊烯丙基丁醇）和DEF（S，S-丁基磷酸三硫代磷酸酯酶）不会增强氟虫腈对这两个种群的毒性。

对DCB中氟虫腈抗性的遗传模式的研究可能有助于延缓对杀虫剂的抗性。