Fluazaindolizine mitigates plant-parasitic nematode activity at sublethal dosages
Fluazaindolizine mitigates plant-parasitic nematode activity at sublethal dosages
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Fluazaindolizine 在亚致死剂量下可减轻植物寄生线虫活性
DOI：
10.1007/s10340-020-01262-2
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发表时间：
2020-07
影响因子：
4.8
通讯作者：
Becker J. Ole
中科院分区：
文献类型：
--
作者：
Wu Hai Yan;Silva Juliana de Oliveira;Becker Jennifer Smith;Becker J. Ole
植物寄生线虫是许多农作物的重要害虫，在世界范围内具有相当大的经济影响。人们迫切需要高毒性土壤熏蒸剂和杀线虫剂的替代品。氟氮唑嗪是一种含氟杀线虫剂，作用方式未知，具有极低的哺乳动物毒性。本研究通过体外死亡率和对线虫敏感寄主植物的寄生试验，研究了几种植物寄生线虫对该化合物的早期反应。体外作用72 h后，氟氮唑嗪对南方根结线虫第二期幼虫和半圆线虫幼虫表现出最强的毒力，其LC_(50)值分别为177.14和355.2 mg L−1。隐姓埋名的人对杀线虫的敏感度要低得多。健身操。接种黄瓜幼苗前用不同浓度的氟氮唑嗪处理12h，对隐名J2的影响较大。最低浓度为5 mg的L−1与对照相比，根结瘤、产卵量和产卵量均降低到25%左右。在另一项生物测定中，将沙氏拟青霉J2以100g和200g L−1在土壤中暴露72小时，然后用3日龄的萝卜幼苗侵染土壤。J2侵染率分别为39.8%和59.6%。综上所述，受试线虫物种在暴露于氟氮唑嗪后的体外死亡率有很大的差异。然而，生物测定表明，在非致死浓度和短期接触杀线虫剂的情况下，寄生已经受到严重影响。
Plant-parasitic nematodes are significant pests for many crops with considerable economic impact worldwide. Alternatives to highly toxic soil fumigants and nematicides are urgently sought after. Fluazaindolizine is a fluorinated nematicide with a novel, unknown mode-of-action and very low mammalian toxicity. The current research investigated the early responses of several plant-parasitic nematode species to the compound by in vitro mortality and parasitism trials with nematode-susceptible host plants. After a 72-h in vitro exposure time, fluazaindolizine exhibited the most potent toxic activity against the second-stage juveniles (J2) ofMeloidogyne incognitaandTylenchulus semipenetranswith LC50values of 177.14 and 355.2 mg L−1, respectively.Pratylenchus brachyurus, J2 of theHeterodera schachtii, and eggs ofM. incognitawere considerably less sensitive to the nematicide. The fitness ofM. incognitaJ2 was strongly affected when exposed to various concentrations of fluazaindolizine for 12 h before inoculation of cucumber seedlings in soilless seed pouches. The lowest level of 5 mg L−1reduced root galling, egg mass production, and the number of eggs to about 25% compared to the water control. In another bioassay,H. schachtiiJ2 were exposed to fluazaindolizine at 100 and 200 mg L−1for 72 h before used to infest soil with 3-day-old radish seedlings. About 39.8% and 59.6%, respectively, fewer J2 invaded the roots compared to the control. In conclusion, the tested nematode species varied considerably in their in vitro mortality following fluazaindolizine exposure. However, the bioassays demonstrated that parasitism was already severely impacted at non-lethal concentrations and short-term exposure to the nematicide.
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影响因子：
4.5
作者：
Hajihassani, Abolfazl;Davis, Richard F.;Timper, Patricia
通讯作者：
Timper, Patricia
影响因子：
1.2
作者：
Thoden, Tim;Pardavella, Iro V.;Tzortzakakis, Emmanuel A.
通讯作者：
Tzortzakakis, Emmanuel A.
DOI：
--
发表时间：
1973
期刊：
Plant disease reporter
影响因子：
--
作者：
R. Hussey;K. Barker
通讯作者：
R. Hussey;K. Barker
DOI：
10.1007/978-94-007-0434-3_2
发表时间：
2011-01-01
期刊：
GENOMICS AND MOLECULAR GENETICS OF PLANT-NEMATODE INTERACTIONS
影响因子：
--
作者：
Nicol, J. M.;Turner, S. J.;Maafi, Z. Tahna
通讯作者：
Maafi, Z. Tahna
影响因子：
2.7
作者：
Lahm, George P.;Desaeger, Johan;Wiles, John A.
通讯作者：
Wiles, John A.