Fungicides are routinely applied to golf course putting greens throughout the growing season. Gaining a better understanding of fungicide fate can improve fungicide use and stewardship. Therefore, optimizing fungicide applications with post-application management practices may enhance fungicide movement and limit potential off-target effects. Two field studies were initiated on a golf course putting green to evaluate the influence of post-fungicide application irrigation and mowing timing on fungicide movement into the soil profile and removal in turfgrass clippings. Plots were treated with a single application of either pyraclostrobin, triadimefon, or penthiopyrad and received 0.64 cm post-application irrigation immediately or 6 h after application or received no post-application irrigation. Clippings were collected 0, 1, and 3 d after treatment (DAT). Cores were harvested 0, 1, 3, 5, 7, and 14 DAT and dissected into the remaining aboveground vegetation (RAV; verdure/thatch; 0-to-2.5-, 2.5-to-5.1-, and 5.1-to-7.6-cm soil subsections). A small amount of fungicide (<3.6%) was removed with clippings regardless of mowing and irrigation treatment. Post-application irrigation treatment influenced fungicide movement; however, >50% of fungicide remained restricted to the RAV for the first 3 DAT. Less fungicide remained restricted to the RAV, and more fungicide was detected in deeper soil depths when plots were irrigated immediately after application. Fungicide was only detected at the 5.1-to-7.6-cm depth when plots were irrigated immediately. Applying post-application irrigation immediately may result in more fungicide moving down to soilborne targets. Irrigating 6 h after application facilitated moderate fungicide movement compared with irrigating immediately but was better than no post-application irrigation.

中文翻译：

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施用后灌溉和割草时间对美国高尔夫协会高尔夫球场果岭杀菌剂命运的影响

在整个生长季节，杀菌剂通常用于高尔夫球场推杆果岭。更好地了解杀菌剂的归宿可以改善杀菌剂的使用和管理。因此，通过应用后管理实践优化杀菌剂应用可能会增强杀菌剂的移动并限制潜在的脱靶效应。在高尔夫球场果岭上启动了两项实地研究，以评估施用杀菌剂后的灌溉和割草时间对杀菌剂进入土壤剖面和去除草坪草屑的影响。用单次施用唑菌胺酯、嘧菌酯或吡噻菌胺处理地块，并在施用后立即或 6 小时接受 0.64 cm 施用后灌溉，或不接受施用后灌溉。收集剪报 0, 1, 和治疗后 3 天（DAT）。在 0、1、3、5、7 和 14 DAT 收获核心并解剖到剩余的地上植被（RAV；绿色/茅草；0-2.5-、2.5-to-5.1-和 5.1-to-7.6 -cm 土壤分段）。无论修剪和灌溉处理如何，都用剪报去除了少量杀菌剂 (<3.6%)。施用后灌溉处理影响了杀菌剂的流动；然而，在前 3 个 DAT 中，>50% 的杀菌剂仍然仅限于 RAV。较少的杀菌剂仍然仅限于 RAV，而在施用后立即灌溉地块时，在较深的土壤深度中检测到更多的杀菌剂。当立即灌溉地块时，仅在 5.1 至 7.6 厘米深度处检测到杀菌剂。立即应用施用后灌溉可能会导致更多杀菌剂向下移动到土壤传播目标。