PDF(Pubmed)
Abstract：
Plant extracts and essential oils are considered alternatives to synthetic chemicals with toxic effects on insects and mites. Acaricidal, repellent, and oviposition effects of commercially available essential oils of Origanum vulgare L. (Lamiaceae) and Syzygium aromaticum (L.) (Myrtaceae) were investigated in this study on Tetranychus urticae Koch (Acari: Tetranychidae), one of the main pests in agriculture, on two host plant species using leaf disc bioassays. O. vulgare essential oil showed higher toxicity to T. urticae protonymphs and adult females inhabiting both bean and tomato leaves than S. aromaticum essential oil. The LC50 values of O. vulgare essential oil were found to be 1.67 and 2.05 µl L-1 air for the bean populations in protonymphs and adult females and 1.87 and 3.07 µl L-1 air for the tomato populations, respectively. Five percent concentration of S. aromaticum essential oil had the highest repellent effect on the bean population of T. urticae after 1, 24, and 48 h, resulting in 61.22%, 40.81%, and 18% repellence, respectively. Although O. vulgare showed higher toxic effects, S. aromaticum was a better repellent against the bean population of T. urticae. The mortality rates of adult females of T. urticae treated with either O. vulgare or S. aromaticum essential oil increased with the increasing concentration and time on both host plants. Both essential oils caused a decrease in egg number and larvae hatching in both bean and tomato populations of T. urticae. In the light of the results obtained, O. vulgare and S. aromatium essential oils have the potential to be used in the control programs against T. urticae in both host plants.
摘要：
植物提取物和精油被认为是合成化学物质的替代品，对昆虫和螨虫具有毒性作用。杀螨药，驱虫剂,和市售的牛至精油的产卵作用（唇科）和香菇（L.）（桃金娘科）在本研究中对TetranychusurticaeKoch（Acari：Tetranychidae）进行了调查，农业中的主要害虫之一，在两种寄主植物物种上使用叶盘生物测定法。O.vulgare精油对生活在豆和番茄叶片中的T.urticae原名和成年雌性的毒性高于S.aromaticum精油。发现O.vulgare精油的LC50值对于原名和成年雌性的豆类种群为1.67和2.05μlL-1空气，对于番茄种群为1.87和3.07μlL-1空气，分别。5％浓度的香菇精油在1、24和48小时后对T.urticae的豆种群具有最高的驱除作用，导致61.22%，40.81%,和18%的驱避性,分别。尽管O.vulgare显示出更高的毒性作用，S.芳香剂是一种更好的驱避剂，可以抵抗T.urticae的豆种群。用O.vulgare或S.aromaticum精油处理的T.urticae成年雌性的死亡率随着两种寄主植物的浓度和时间的增加而增加。两种精油均导致豆和番茄种群的虫卵数量和幼虫孵化减少。根据获得的结果，O.vulgare和S.aromatium精油具有在两种寄主植物中用于针对荨麻疹的控制计划的潜力。
