Nasiou Eleni, Giannakou Ioannis O
Laboratory of Agricultural Zoology and Entomology, Department of Science of Crop Production, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece.
Plants (Basel). 2023 Apr 30;12(9):1851. doi: 10.3390/plants12091851.
Root-knot nematodes (RKN; spp.) are obligatory endoparasites with worldwide distribution which cause severe damage to agricultural crops. The present study aimed to define the nematicidal activity of thymol on different life stages of the root-knot nematode (Treub) Chitwood, at concentrations of 37.5-1000 μL/L. This study is the first to report the effect of thymol on egg differentiation and also its vapor and sublethal concentration activities. A mortality of greater than 90% of second-stage juveniles (J2s) occurred after 96 h of exposure at a concentration of 500 μL/L. At this concentration, thymol inhibited 59.7% of nematode hatching. In addition, the use of thymol at sublethal concentrations reduced the number of females per gram in tomato roots in a pot test, as well as inhibiting egg differentiation. On the contrary, no nematostatic effects were observed in paralysis bioassays. The results presented here indicate that the use of thymol may show its potential as a source of a new sustainable nematicidal product.
根结线虫（RKN； 属）是一种专性内寄生线虫，分布于世界各地，对农作物造成严重损害。本研究旨在确定百里香酚在37.5 - 1000 μL/L浓度下对南方根结线虫（Treub）Chitwood不同生活阶段的杀线虫活性。本研究首次报道了百里香酚对卵分化的影响及其气态和亚致死浓度活性。在500 μL/L浓度下暴露96小时后，超过90%的二龄幼虫（J2s）死亡。在此浓度下，百里香酚抑制了59.7%的线虫孵化。此外，在盆栽试验中，使用亚致死浓度的百里香酚减少了番茄根中每克的雌虫数量，并抑制了卵的分化。相反，在麻痹生物测定中未观察到抑线虫作用。此处给出的结果表明，使用百里香酚可能显示出其作为一种新型可持续杀线虫产品来源的潜力。
