Ramoutar Darryl, Alm Steven R, Cowles Richard S
Department of Plant Sciences and Entomology, University of Rhode Island, Kingston, RI 02881, USA.
J Econ Entomol. 2009 Feb;102(1):388-92. doi: 10.1603/029.102.0150.
Topical application bioassays of bifenthrin and lambda-cyhalothrin were conducted on field-collected populations of Listronotus maculicollis Kirby (Coleoptera: Curculionidae) from eight southern New England golf courses, six in Connecticut, one in Massachusetts, and one in Rhode Island. Concentrations versus mortality regression lines were estimated to compare the LD50 values and resistance ratios for each insecticide and each population. The LD50 ranges for bifenthrin and lambda-cyhalothrin were 1.80-244.67 ng per insect and 0.52-159.53 ng per insect, respectively. The field-collected strains showed low to high levels of resistance to bifenthrin (6.1-135.9-fold) and lambda-cyhalothrin (28.7-306.8-fold). This is the first report of insecticide resistance in this species. The loss of pyrethroid efficacy is making control of Listronotus maculicollis more challenging.
对从新英格兰南部八个高尔夫球场采集的黄斑豆象（鞘翅目：象甲科）田间种群进行了联苯菊酯和高效氯氟氰菊酯的局部应用生物测定，其中六个球场位于康涅狄格州，一个位于马萨诸塞州，一个位于罗德岛州。估计浓度与死亡率回归线，以比较每种杀虫剂和每个种群的半数致死剂量（LD50）值和抗性比率。联苯菊酯和高效氯氟氰菊酯的LD50范围分别为每头昆虫1.80 - 244.67纳克和每头昆虫0.52 - 159.53纳克。田间采集的菌株对联苯菊酯（6.1 - 135.9倍）和高效氯氟氰菊酯（28.7 - 306.8倍）表现出低到高水平的抗性。这是该物种抗杀虫剂的首次报道。拟除虫菊酯药效的丧失使得黄斑豆象的防治更具挑战性。
