Department of Crop Sciences, University of Illinois, Urbana, IL 61801.
GROWMARK Member Services, Bloomington, IL 61701.
Plant Dis. 2024 Feb;108(2):342-347. doi: 10.1094/PDIS-04-23-0725-RE. Epub 2024 Feb 9.
The effects of a fluopyram seed treatment on lesion nematodes ( spp.) and other plant-parasitic nematodes (PPNs) were evaluated on corn in multiple field locations in 2020 and 2021. The highest rate of fluopyram seed treatment (0.15 mg seed) reduced early season population density of lesion nematodes compared with the base treatment control in 2020 only. However, fluopyram did not affect late season lesion nematode population density and corn yields. Fluopyram seed treatment also had minimal or nonsignificant effects on other PPN species. Based on these results, the effects of fluopyram were tested in vitro on . Results demonstrated that fluopyram severely affected motility in . The sensitivity of second-stage juveniles (J2s) to fluopyram was significantly higher than at J4 and adult, suggesting that sensitivity to fluopyram is dependent on developmental stage. In addition, the effects of fluopyram were reversible at an EC but were irreversible at the maximum concentration (25 μg/ml). Overall, our results indicate that fluopyram has potential for controlling , but its efficacy is variable depending on nematode developmental stage and chemical concentration. Further research is needed to determine if these impacts can translate to field scenarios.
2020 年和 2021 年，在多个田间地点，评估了氟吡菌酰胺种子处理对玉米根结线虫（ spp.）和其他植物寄生线虫（PPNs）的影响。与基础处理对照相比，氟吡菌酰胺种子处理（0.15mg 种子）的最高剂量仅在 2020 年降低了早期季节根结线虫的种群密度。然而，氟吡菌酰胺处理对后期根结线虫种群密度和玉米产量没有影响。氟吡菌酰胺种子处理对其他 PPN 物种也几乎没有或没有显著影响。基于这些结果，在体外测试了氟吡菌酰胺对 的影响。结果表明，氟吡菌酰胺严重影响了 的运动性。二龄幼虫（J2）对氟吡菌酰胺的敏感性明显高于 J4 和成虫，表明对氟吡菌酰胺的敏感性取决于发育阶段。此外，在 EC 下，氟吡菌酰胺的作用是可逆的，但在最大浓度（25μg/ml）下是不可逆的。总的来说，我们的结果表明，氟吡菌酰胺具有控制 的潜力，但根据线虫的发育阶段和化学浓度，其效果是可变的。需要进一步研究来确定这些影响是否可以转化为田间情况。
