Rhyne Megan N, Richards Stephanie L
Environmental Health Sciences Program, Department of Health Education and Promotion, College of Health and Human Performance, East Carolina University, 3403 Carol Belk Building, 300 Curry Court, Greenville, NC 27858.
J Am Mosq Control Assoc. 2020 Mar;36(1):11-15. doi: 10.2987/19-6893.1.
is a vector of several arboviruses; however, control of this day-active species is difficult with ultra-low-volume insecticide treatments applied at dusk/dawn periods. In the current laboratory study, blood-fed were exposed to Archer (insect growth regulator AI: pyriproxyfen) residue in glass bottles (to approximate barrier treatment) and allowed to oviposit. Control mosquitoes were exposed to clean bottles. To evaluate potential dilution effects of water volume, mosquitoes were allowed to oviposit in (relatively) small (59 ml water) or large (177 ml water) containers. The extent to which fecundity (number of eggs laid), fertility rate (number of larvae hatched/number of eggs laid × 100), and emergence rate (number of adults emerged/number of larvae hatched × 100) differed between groups was characterized. In the control group, 18-21 (82-95%) mosquitoes laid eggs, while only 10-11 (45-50%) of mosquitoes in the pyriproxyfen group laid eggs. These sample sizes should be considered when comparing results to other studies. Significantly lower ( = 0.0008) fecundity was observed in mosquitoes exposed to pyriproxyfen (mean ± SE) (small container: 25.2 ± 7.1, large container: 24.3 ± 7.1) compared to control mosquitoes (small container: 49.2 ± 7.8, large container: 52.7 ± 5.2). Regardless of treatment, no significant differences in fecundity were observed between mosquitoes allowed to oviposit in different-sized containers. Hatch rate was significantly lower in the pyriproxyfen group and was impacted by container size ( = 0.032) and treatment ( < 0.0001) (large, control: 61.9% ± 7.8; small, control: 38.0% ± 7.1; large, treated: 10.3% ± 2.4; small, treated: 2.9% ± 1.9). Adult emergence rates were not significantly impacted by treatment or container size. Pyriproxyfen applied as a barrier treatment may be an effective tool for controlling .
是几种虫媒病毒的传播媒介；然而，在黄昏/黎明时段采用超低容量杀虫剂处理来控制这种日间活动的物种很困难。在当前的实验室研究中，吸食过血液的[蚊虫名称未给出]被置于玻璃瓶中接触Archer（昆虫生长调节剂活性成分：吡丙醚）残留（以模拟屏障处理）并让其产卵。对照蚊虫被置于干净的瓶子中。为评估水量的潜在稀释效应，让蚊虫在（相对）小（59毫升水）或大（177毫升水）的容器中产卵。对不同组之间的繁殖力（产卵数）、孵化率（孵化的幼虫数/产卵数×100）和羽化率（羽化的成虫数/孵化的幼虫数×100）的差异程度进行了表征。在对照组中，18 - 21只（82 - 95%）蚊虫产卵，而在吡丙醚组中只有10 - 11只（45 - 50%）蚊虫产卵。在将结果与其他研究进行比较时应考虑这些样本量。与对照蚊虫（小容器：49.2±7.8，大容器：52.7±5.2）相比，接触吡丙醚的蚊虫（平均±标准误）繁殖力显著更低（P = 0.0008）（小容器：25.2±7.1，大容器：24.3±7.1）。无论处理如何，在不同大小容器中产卵的蚊虫之间未观察到繁殖力有显著差异。吡丙醚组的孵化率显著更低，并且受到容器大小（P = 0.032）和处理（P < 0.0001）的影响（大容器，对照：61.9%±7.8；小容器，对照：38.0%±7.1；大容器，处理组：10.3%±2.4；小容器，处理组：2.9%±1.9）。成虫羽化率未受到处理或容器大小的显著影响。作为屏障处理施用的吡丙醚可能是控制[蚊虫名称未给出]的有效工具。
