Dollar spot and brown patch fungicide management strategies in four creeping bentgrass cultivars
Dollar spot and brown patch fungicide management strategies in four creeping bentgrass cultivars
复制标题
四种匍匐翦股颖品种的美元斑病和棕斑病杀菌剂管理策略
DOI：
10.2135/cropsci2001.4141190x
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
N. Tisserat
中科院分区：
文献类型：
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作者：
D. Settle;J. Fry;N. Tisserat
对匍匐弯草（Agrostis palustris Huds.）新品种的抗病性和杀菌剂应用策略进行全面评价，以纳入害虫综合治理计划。我们的目标是评估L-93‘、Penncross’、Providence‘和Crenshaw’匍匐曲草的斑疹病（Sclerotinia homoeocarpa F.T. Bennett）和褐斑病（Rhizoctonia solani Kuhn）的严重程度和草坪质量，这些曲草采用预防性、治疗性和基于天气模型的杀菌剂施用策略进行管理。这项实地研究于1997年至1999年在堪萨斯州曼哈顿的一个沙地推杆果岭进行。未经杀菌剂处理的L-93对黑斑病的抗性最强；彭克罗斯和普罗维登斯处于中间位置；而克伦肖最易受影响。克伦肖在1998年对褐斑的敏感性高于其他品种，但在1999年与L-93相似。使用抗病品种（如L-93）而不是易感品种（如克伦肖品种），在实施疾病控制策略方面提供了更大的灵活性。在L-93中，采用预防性杀菌剂每隔14或28天施用一次，预防性低剂量施用百菌清（四氯二苯腈，每隔7天施用3.5 kg a.i. ha -1），或在观察到疾病增加时施用治疗性杀菌剂来控制Dollar spot。在克伦肖，只有14天的预防性杀菌剂有效地控制了美元斑疹。考虑到3年期间的所有品种，使用治疗（n = 11-17）策略的杀菌剂用量少于使用预防（n = 30）策略的杀菌剂用量。当褐色斑是原发疾病时，治疗策略有效，而当褐色斑是原发疾病时，治疗策略无效。
New creeping bentgrass (Agrostis palustris Huds.) cultivars should be thoroughly evaluated for disease resistance and fungicide application strategies for inclusion in integrated pest management plans. Our objectives were to evaluate dollar spot (Sclerotinia homoeocarpa F.T. Bennett) and brown patch (Rhizoctonia solani Kuhn) severity, and turf quality of L-93', Penncross', Providence', and Crenshaw' creep-ing bentgrass managed using preventive, curative, and weather model-based fungicide application strategies. This field study was conducted on a sand-based putting green in Manhattan, KS, from 1997 through 1999. Nonfungicide-treated L-93 exhibited greatest resistance to dollar spot; Penncross and Providence were intermediate; and Crenshaw was most susceptible. Crenshaw exhibited greater brown patch susceptibility than other cultivars in 1998, but was similar to L-93 in 1999. Greater flexibility in imposing a disease control strategy was afforded by using a disease-resistant (i.e., L-93), rather than a disease-susceptible (i.e., Crenshaw) cultivar. Dollar spot was controlled in L-93 using preventive fungicide applications on 14- or 28-d intervals, preventive low-rate applications of chlorothalonil (tetrachloroisophthalonitrile, 3.5 kg a.i. ha -1 ) every 7 d, or a curative fungicide application when an increase in the disease was observed. In Crenshaw, only the 14-d preventive fungicide regime effectively controlled dollar spot. Considering all cultivars across the 3-yr period, fewer fungicide applications were made using a curative (n = 11-17) than a preventive (n = 30) strategy. The curative strategy was effective when dollar spot, but not when brown patch was the primary disease.