Kessler Alexandra C, Koehler Alyssa M
Department of Plant and Soil Sciences, University of Delaware, Newark, DE 19716.
J Nematol. 2023 Aug 1;55(1):20230026. doi: 10.2478/jofnem-2023-0026. eCollection 2023 Feb.
Soybean Cyst Nematode (SCN), Ichinohe, is the most important pathogen of soybean in the Mid-Atlantic region. In recent decades, a decline in the effectiveness of genetic resistance has been observed and additional management approaches are needed. Seed treatments are of rising interest, but no local data on product response exists for the region. In 2020-2021, two experiments were conducted to observe the effects of chemical and biological seed treatment options. In one experiment, chemical seed treatments pydiflumetofen (Saltro®) and fluopyram (ILEVO®) were screened against nontreated plain seed for SCN suppression. In a second experiment, pydiflumetofen, fluopyram and four biological nematode-protectant seed treatments with a standard base insecticide and fungicide treatment were compared to nontreated plain seed and seed with only the standard base treatment to test product efficacy against SCN. Seed treatments increased the percent emergence over plain seed. Nematode reproductive factors and female counts from roots were collected, but did not statistically differ between seed treatments or plain seed. Yield differences were observed in one of the five trials, where pydiflumetofen + base seed treatment yielded the highest ( < 0.001) at 3813.1 kg/ha. Response from seed treatments varied, with no specific seed treatment consistently reducing SCN populations or increasing yield across trials. Seed treatments may have potential as an element of an integrated management approach for SCN.
大豆孢囊线虫（SCN），伊氏大豆孢囊线虫，是大西洋中部地区大豆最重要的病原体。近几十年来，已观察到遗传抗性的有效性有所下降，因此需要额外的管理方法。种子处理越来越受到关注，但该地区尚无关于产品反应的本地数据。在2020 - 2021年，进行了两项试验以观察化学和生物种子处理方案的效果。在一项试验中，针对未处理的普通种子筛选了化学种子处理剂氟唑菌酰胺（Saltro®）和氟吡菌酰胺（ILEVO®）对SCN的抑制作用。在第二项试验中，将氟唑菌酰胺、氟吡菌酰胺以及四种带有标准基础杀虫剂和杀菌剂处理的生物线虫保护剂种子处理与未处理的普通种子和仅进行标准基础处理的种子进行比较，以测试产品对SCN的功效。种子处理使出苗率高于普通种子。收集了线虫繁殖因子和根部雌虫数量，但种子处理与普通种子之间在统计学上并无差异。在五项试验中的一项试验中观察到了产量差异，其中氟唑菌酰胺 + 基础种子处理的产量最高（<0.001），为3813.1千克/公顷。种子处理的反应各不相同，没有一种特定的种子处理能在所有试验中持续减少SCN种群数量或提高产量。种子处理作为SCN综合管理方法的一个要素可能具有潜力。
