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首页> 外文期刊>Plant disease management reports PDMR >Evaluation of foliar fungicide treatments on winter wheat in Clarksville, Michigan, 2008
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Evaluation of foliar fungicide treatments on winter wheat in Clarksville, Michigan, 2008

机译：2008年密歇根州克拉克斯维尔的冬小麦叶面杀菌剂处理效果评估

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A field experiment was conducted at the MSUE research station near Clarksville, MI in Riddles sandy loam. Before planting, the ground was prepared with a disc ripper and field cultivator. Fertilizer was applied on 27 Sep 07 at a rate of 20lb/A actual N, 50 lbs/A of P, and 100 lb/A of K. On 9 Oct 07, Caledonia soft white winter wheat treated with Raxil/XT (tebuconazole 15% and metalaxyl 20%, 0.20 fl oz/cwt) was drilled at a rate of 165 lb/A into tilled soil with corn residuepresent. Plots were 26 feet long and fourteen 7-in. rows wide. Plots were arranged in a randomized complete block design with four replications. Plots were fertilized with 85 lb/A nitrogen with 6 fl oz /A Nutrisphere on 19 Apr 08. AffinityBroadspec herbicide (25% thifensulfuron-methyl and 25% tribenuron-methyl) at a rate of 0.75oz/A and Improve nonionic surfactant (0.125 % V/V.) were applied on 13 May 08 to control broadleaf weeds. Fungicides were applied at a volume of 20gal/A at two different spray timings using a handheld CO2 back pack sprayer set at 40 psi equipped with four TJ60 8003 nozzles spaced 20 in. apart. Plots were rated for powdery mildew and Septoria blotch on 13 Jun 08. At five equidistantlocations throughout the length of each plot, plants in the center rows were rated using a scale of 0-9, with 0 = no disease, 1 = disease present on flag-4 and below, 2 = disease present on flag-3 and below, 3 = disease on flag-2 and below, 4 = diseasepresent on flag -1 and below, 5 = disease on flag leaf, up to 1%, 6 = disease on flag leaf >1% -5%, 7 = disease on flag leaf >5%-10%, 8 = disease on flag leaf >10%-20%, and 9= disease on flag leaf > 20%. Plots were rated (0-100%) for headblight (HB) incidence, severity and field severity (index) on 27 Jun 08, using four subsamples per plot and ten heads per subsample. The center five feet of each plot was harvested using a small plot combine on 24 Jul 08. Test weight, plotweight, and grain moisture were collected at harvest, and yield was adjusted to 13% moisture. Grain weight for 1000 seed was determined post-harvest. Grain sub-samples were sent to the University of Minnesota for analysis of deoxynivalenol.Data for powdery mildew severity, Septoria blotch severity, HB incidence, head severity, and field severity, ppm DON, test weight, yield and 1000 seed weight were subjected to analysis of variance followed by mean separation using Fisher’sprotected least significant difference (LSD) with P=0.05.
机译：在密歇根州里德尔斯沙壤土的克拉克斯维尔附近的MSUE研究站进行了现场试验。播种前，用圆盘裂土器和田间中耕机准备地面。在07年9月27日施肥，施用量为实际N，20 lb / A，P 50 lbs / A和100​​ lb / A钾。07年10月9日，用Raxil / XT（戊唑醇15以165 lb / A的速率在含玉米残留物的耕种土壤中钻入5％的甲霜灵和20％的甲霜灵（0.20 fl oz / cwt）。地块长26英尺，十四个7英寸。行宽。以四个重复的随机完整块设计来布置图。在08年4月19日，以85 lb / A氮和6 fl oz / A Nutrisphere的土壤施肥。AffinityBroadspec除草剂（25％噻吩磺隆甲基和25％苯磺隆甲基）的比率为0.75oz / A，并改善非离子表面活性剂（0.125） （％V / V。）于08年5月13日施用以防治阔叶杂草。使用设置在40 psi的手持式CO2背负式喷雾器（配有四个间隔20英寸的TJ60 8003喷嘴），在两种不同的喷雾时间下以20加仑/ A的量施用杀菌剂。在08年6月13日对样地进行白粉病和Septoria斑点评级。在每个样地长度的五个等距位置，使用0-9的等级对中心行中的植物进行评级，其中0 =无病，1 =发生病。标志4及以下，2 =标志3及以下存在疾病，3 =标志2及以下存在疾病，4 =标志-1及以下存在疾病，5 =标志叶上存在疾病，最高1％，6 =旗叶上的疾病> 1％-5％，7 =旗叶上的疾病> 5％-10％，8 =旗叶上的疾病> 10％-20％，9 =旗叶上的疾病> 20％。在08年6月27日，对田野的头虱（HB）发病率，严重性和田野严重性（指数）进行了等级（0-100％）评估，每个地块使用四个子样本，每个子样本使用十个头。在08年7月24日，使用一个小地块收割机收割每个地块中心的5英尺。在收获时收集测试重量，地块重量和谷物水分，并将产量调整为13％的水分。收获后确定1000粒种子的粒重。将谷物子样品送至明尼苏达大学进行脱氧雪腐烯醇的分析。对白粉病严重程度，Septoria斑点严重程度，HB发生率，头部严重程度和田间严重程度，ppm DON，试验重量，产量和1000种子重量进行数据分析进行方差分析，然后使用Fisher最小二乘方差（LSD）进行均值分离，P = 0.05。

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