Eder Reinhard, Consoli Erika, Krauss Jürgen, Dahlin Paul
Agroscope, Research Division Plant Protection, Phytopathology and Zoology in Fruit and Vegetable Production, 8820 Wädenswil, Switzerland.
Agroscope, Research Division Plants and Plant Products, Vegetable-Production Extension, 8820 Wädenswil, Switzerland.
Plants (Basel). 2021 Feb 18;10(2):394. doi: 10.3390/plants10020394.
The devastating root-knot nematode can cause severe damage to field and greenhouse crops. Due to high economic losses, alternative products are essential to replace banned or strictly regulated nematicides that affect human health and/or the environment. Garlic based products have been previously investigated as environmentally friendly nematicides and their active substances, diallyl polysulfides exist as formulated nematicides on the market. We tested the garlic-based nematicide NEMguard DE as protective of tomato roots. In vitro evaluation of the lethal concentration (LC) showed strong nematicidal activity with LC of 0.8 mg/mL after 96 h and LC of 1.5 mg/mL. NEMguard DE showed protective effect against as a single application in small pots and a second application further reduced root galling, significantly. Large greenhouse trials were carried out in two consecutive years to test single and monthly applications of NEMguard DE. In both years, no controlling effect could be observed on . We assume that the silt content of the loamy sandy soil used had an effect on the polysulfides, inhibiting their nematicidal effect. We conclude that further experiments are necessary to investigate the nematicidal potential of NEMguard DE under different soil compositions or as a different formulation.
具有毁灭性的根结线虫会对大田和温室作物造成严重损害。由于经济损失巨大，必须有替代产品来取代那些影响人类健康和/或环境的被禁用或严格监管的杀线虫剂。基于大蒜的产品此前已作为环境友好型杀线虫剂进行过研究，其活性物质二烯丙基多硫化物作为制剂杀线虫剂在市场上有售。我们测试了基于大蒜的杀线虫剂NEMguard DE对番茄根系的保护作用。对致死浓度（LC）的体外评估显示，其具有很强的杀线虫活性，96小时后的LC为0.8毫克/毫升，1.5毫克/毫升时也有活性。NEMguard DE作为单次施用于小盆中的药剂显示出保护作用，第二次施用进一步显著减少了根结。连续两年进行了大型温室试验，以测试NEMguard DE的单次施用和每月施用情况。在这两年中，均未观察到对[此处原文缺失具体对象]的防治效果。我们推测，所用的壤质砂土的粉砂含量对多硫化物有影响，抑制了它们的杀线虫作用。我们得出结论，有必要进一步开展实验，以研究NEMguard DE在不同土壤成分下或作为不同制剂时的杀线虫潜力。
