Department of Plant Pathology and Crop Physiology, LSU AgCenter, Baton Rouge, LA, USA.
Pest Manag Sci. 2022 Apr;78(4):1398-1406. doi: 10.1002/ps.6756. Epub 2022 Jan 10.
Meloidogyne enterolobii (Yang and Eisenback) was recently introduced into Louisiana on contaminated sweetpotato planting material. Given the known variation in sensitivity to nematicides within the genus Meloidogyne, there is question as to whether fluorinated nematicides will be as efficacious toward M. enterolobii as they are with M. incognita (Chitwood). Using a series of in vitro and growth cabinet experiments, this study compared the sensitivity of M. enterolobii and M. incognita to four synthetic non-fumigant nematicides (fluopyram, fluensulfone, fluazaindolizine, and oxamyl).
Meloidogyne enterolobii had lower sensitivity to nematicides than M. incognita in the majority of the in vitro exposure assays. Similar levels of reduction in root infectivity were observed after nematicide exposure among both nematode species. Fluopyram showed high hatching inhibition for both Meloidogyne species at low concentrations [median effective concentration (EC ) values of 0.273 to 0.018 mg L ], whereas fluensulfone showed high root penetration inhibition at low concentrations (EC values of 0.151 to 0.065 mg L ) relative to that of other evaluated nematicides. For both Meloidogyne species, each of the four non-fumigant nematicides reduced root galling (58-96% reduction for M. enterolobii, 71-100% reduction for M. incognita) and egg production (63-99% reduction for M. enterolobii, 58-96% reduction for M. incognita) on sweetpotato when applied at the label recommended rate.
Fluorinated nematicides and oxamyl show capacity to suppress M. enterolobii on sweetpotato. © 2021 Society of Chemical Industry.
Meloidogyne enterolobii（Yang 和 Eisenback）最近在受污染的甘薯种植材料上被引入路易斯安那州。鉴于已知在根结线虫属内对杀线虫剂的敏感性存在差异，因此氟代杀线虫剂对 M.enterolobii 的功效是否与 M.incognita（Chitwood）相同存在疑问。本研究使用一系列体外和生长柜实验，比较了 M.enterolobii 和 M.incognita 对四种合成非熏蒸性杀线虫剂（氟吡菌酰胺、氟吡磺隆、氟烯腙和涕灭威）的敏感性。
在大多数体外暴露试验中，M.enterolobii 对杀线虫剂的敏感性低于 M.incognita。在两种线虫物种中，暴露于杀线虫剂后，根侵染率均观察到相似程度的降低。氟吡菌酰胺在低浓度下对两种根结线虫物种均表现出高孵化抑制作用[中浓度（EC）值为 0.273 至 0.018mg/L]，而氟吡磺隆在低浓度下对根穿透抑制作用较高（EC 值为 0.151 至 0.065mg/L），与其他评估的杀线虫剂相比。对于两种根结线虫物种，四种非熏蒸性杀线虫剂中的每一种都降低了甘薯上的根结（M.enterolobii 减少 58-96%，M.incognita 减少 71-100%）和产卵量（M.enterolobii 减少 63-99%，M.incognita 减少 58-96%）当按推荐标签剂量施用时。
氟代杀线虫剂和涕灭威能够抑制甘薯上的 M.enterolobii。© 2021 化学工业协会。
