Anthracnose is a turfgrass disease caused by the fungal pathogen Colletotrichum cereale Manns and can cause severe damage to annual bluegrass putting greens. Most turfgrass managers use fungicides to manage anthracnose, although legislation in some locations are compelling managers to seek fungicide alternatives. This 2‐yr field experiment in western Oregon evaluated different rates and application intervals of a soil surfactant—either in combination or in the absence of a spring hollow‐tine aerification on anthracnose severity—on an annual bluegrass (Poa annua L. var. reptans) research green. The highest rate of the soil surfactant applied once or twice a week consistently reduced anthracnose severity in both years compared to the nontreated control, although these applications corresponded to four and eight times the monthly label rate. A quarter of the label rate applied once a week suppressed anthracnose at the peak of disease in the second year and as measured by area under disease progress curves in both years. Spring aerification had no effect on anthracnose severity. Area under volumetric water content progress curves calculated using weekly measurements at a 38‐mm depth were not correlated with area under disease progress curves. The volumetric water content percentage was normally above 25%, reducing the risk of confounding between drought stress and treatments on anthracnose suppression. The highest rate of soil surfactant applied at the most frequent interval was the only treatment to receive acceptable turfgrass quality ratings over both years.

中文翻译：

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频繁的土壤表面活性剂应用会影响炭疽病对一年生禾本科植物的研究

炭疽病是一种由真菌病原体谷物炭疽菌引起的草皮草疾病，可能会对一年生的蓝草果岭造成严重损害。尽管某些地方的立法迫使管理者寻求替代杀真菌剂，但大多数草皮管理者仍使用杀真菌剂来控制炭疽病。在俄勒冈州西这2年大田试验评价不同的速率和表面活性剂的组合或在不存在对炭疽病的弹簧空心齿气化的严重程度上的早熟禾（土壤的应用间隔早熟禾属变种reptans）研究绿色。与未经处理的对照相比，在两年中，每周施用一次或两次的土壤表面活性剂的最高用量持续降低了炭疽病的严重性，尽管这些施用量相当于每月标签用量的四倍和八倍。每周应用一次的标签率的四分之一在第二年的疾病高峰期抑制了炭疽病，并且这两年均通过疾病进展曲线下的面积来衡量。春季曝气对炭疽病严重程度没有影响。使用每周测量值在38 mm深度处计算的体积含水量进度曲线下面积与疾病进度曲线下面积不相关。体积水含量百分比通常高于25％，从而降低了干旱胁迫和炭疽病抑制处理之间混淆的风险。