Silva Juliana Junqueira de, Mendes Júlio
Laboratório de Entomologia, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG.
Rev Soc Bras Med Trop. 2007 Nov-Dec;40(6):612-6. doi: 10.1590/s0037-86822007000600002.
Aedes aegypti (L) (Diptera: Culicidae) was reared in several concentrations of diflubenzuron and methoprene under laboratory conditions in Uberlândia, State of Minas Gerais, southeastern Brazil. Characteristics such as LC50 and LC95, the susceptibility of immature stages of different ages to these insect growth regulators and their residual effects were studied. The LC50 and LC95 of diflubenzuron and methoprene were 5.19 and 12.24 ppb; 19.95 and 72.08 ppb, respectively. While diflubenzuron caused great mortality in all larval instars, methoprene was more effective when the mosquito was exposed from the start of the fourth larval instar onwards. Commercial concentrations of these two insect growth regulators close to LC95 presented greater residual activity than did their respective technical formulations. The parameters were compared with those obtained elsewhere. The characteristics investigated here indicate that these insect growth regulators are effective alternatives for controlling the dengue vector in the Uberlândia region.
埃及伊蚊（双翅目：蚊科）在巴西东南部米纳斯吉拉斯州乌贝兰迪亚的实验室条件下，于几种浓度的除虫脲和烯虫酯中饲养。研究了诸如半数致死浓度（LC50）和95%致死浓度（LC95）、不同龄期幼虫对这些昆虫生长调节剂的敏感性及其残留效应等特征。除虫脲和烯虫酯的LC50分别为5.19 ppb和12.24 ppb；LC95分别为19.95 ppb和72.08 ppb。虽然除虫脲在所有龄期幼虫中均导致较高死亡率，但从第四龄幼虫初期开始接触时，烯虫酯更为有效。这两种昆虫生长调节剂接近LC95的商业浓度比其各自的原药制剂具有更高的残留活性。将这些参数与在其他地方获得的参数进行了比较。此处研究的特征表明，这些昆虫生长调节剂是乌贝兰迪亚地区控制登革热传播媒介的有效替代品。
