Shaalan Essam Abdel-salam, Canyon Deon Vahid, Younes Mohamed Wagdy Faried, Abdel-Wahab Hoda, Mansour Abdel-Hamid
Zoology Department, Aswan Faculty of Science, South Valley University, Aswan, Egypt.
J Vector Ecol. 2005 Dec;30(2):295-8.
Synthetic and botanical insecticides can have a profound effect on the developmental period, growth, adult emergence, fecundity, fertility, and egg hatch, resulting in effective control at sub-lethal concentrations. This paper investigated sub-lethal concentrations of fenitrothion, lambda-cyhalothrin, and Callitris glaucophylla Joy Thomps. & L.P. Johnson (Cupressaceae) extract to characterize their effects on the development of Aedes aegypti L. (Diptera: Culicidae) mosquito larvae. The LC25, LC50, and LC75 (four replicates) were used for each synthetic insecticide and the LC25 and LC75 (four replicates) were used for C. glaucophylla. Observations of larval mortality, duration of larval stage, pupal mortality, duration of pupal stage, adult emergence, sex ratio, and malformations were recorded over 14 days. A dose-response effect was observed for all insecticides. Although C. glaucophylla extract doses were higher than synthetic insecticide doses, the LC75 treatment outperformed synthetics by completely prohibiting adult emergence. Consequently, this botanical is recommended for field application either in combination with synthetic or natural insecticides or alone.
合成杀虫剂和植物性杀虫剂会对发育期、生长、成虫羽化、繁殖力、生育力和卵孵化产生深远影响，从而在亚致死浓度下实现有效防治。本文研究了杀螟硫磷、高效氯氟氰菊酯和蓝桉（Callitris glaucophylla Joy Thomps. & L.P. Johnson，柏科）提取物的亚致死浓度，以表征它们对埃及伊蚊（Aedes aegypti L.，双翅目：蚊科）幼虫发育的影响。每种合成杀虫剂使用LC25、LC50和LC75（四个重复），蓝桉使用LC25和LC75（四个重复）。在14天内记录幼虫死亡率、幼虫期持续时间、蛹死亡率、蛹期持续时间、成虫羽化、性别比和畸形情况。所有杀虫剂均观察到剂量反应效应。尽管蓝桉提取物的剂量高于合成杀虫剂的剂量，但LC75处理通过完全阻止成虫羽化，其效果优于合成杀虫剂。因此，建议将这种植物提取物与合成或天然杀虫剂联合使用或单独用于田间应用。
