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首页> 外文期刊>Plant disease management reports PDMR >Evaluation of seed in-furrow and foliar treatments for control of Rhizoctonia diseases of potato in Wisconsin
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Evaluation of seed in-furrow and foliar treatments for control of Rhizoctonia diseases of potato in Wisconsin

机译：在威斯康星州进行种子犁沟和叶面处理对马铃薯根瘤菌病的防治效果评估

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Potatoes were planted on 6 May to initiate a field trial at the Hancock Research Station in central WI to evaluate seed treatment, in-furrow, and foliar-applied fungicides for the control of Rhizoctonia diseases of potato, including seedling decline and tuber black scurf. Fertilization, insect, weed, and foliar disease control was accomplished using standard commercial practices for the production region. Approximately 2 oz seedpieces were cut mechanically on 25 April from US#1 'Russet Burbank' tubers. Seedpieces were allowed to heal for 2 days at 55°F with 95% relative humidity and good airflow prior to treatment and/or planting. A randomized complete block design with four replications were used for the trial, and treatment plots consisted of four 24-ft-long rows spaced 36 in. apart with 12 in. spacing in the row. To minimize soil compaction and damage to plants in rows used for foliar and yield evaluations, drive rows for pesticide application equipment were placed adjacent to plots. In-furrowtreatments were applied using a CO_2 backpack sprayer equipped with a single TeeJet 8002VS flat fan nozzle calibrated to deliver 12 gal/A at a boom pressure of 40 psi. Seed treatments were applied to cut seed prior to planting using same sprayer equipment as previously described. Foliar treatments were applied using the same sprayer equipment as previously described yet calibrated to deliver 35 gal/A at a boom pressure of 40 psi and were applied in addition to aforementioned standard fungicide program.Plots were not inoculated but relied on natural inocula for disease establishment. Seed emergence data were collected 4 June as the number of emerged hills in 10 linear feet of each of the center 2 rows of each plot. Vines were killed with herbicide (Diquat E 1.5 pt/acre +non-ionic surfactant) applied on 9 and 16 September. Plots were harvested, graded, and evaluated for black scurf disease incidence on 24 September. Twenty tubers were randomly selected from each plot and visually evaluated for symptomsof black scurf (% incidence= number of symptomatic tubers/20*100). Precipitation in Hancock during the potato production season was 15.0 in. Supplemental irrigation was applied 44 times during the potato production season for an additional 19.5 in.
机译：马铃薯于5月6日种植，开始在威斯康星州中部的汉考克研究站进行田间试验，以评估种子处理，犁沟和叶面施用的杀真菌剂，以控制马铃薯的根瘤菌病，包括幼苗衰老和块茎黑皮病。施肥，昆虫，杂草和叶面疾病的控制使用生产区域的标准商业惯例完成。从4月25日从1号美国“ Russet Burbank”块茎上机械切下约2盎司种子。在处理和/或种植之前，让种子片在55°F，95％相对湿度和良好气流的条件下恢复2天。该试验使用了随机的，完整的，重复四次的整体设计，治疗地块由四排24英尺长的行组成，这些行间隔36英寸，每行间隔12英寸。为了将土壤压实和对植物的危害减至最低程度，以进行叶面和产量评估，将农药施用设备的驱动行与地块相邻放置。使用配备了单个TeeJet 8002VS平扇喷嘴的CO_2背包喷雾器进行沟内处理，该喷嘴经校准可在40 psi的动臂压力下输送12 gal / A。在种植之前，使用与上述相同的喷雾器设备对种子进行种子处理。使用与前述相同的喷雾器设备进行叶面处理，但已校准为在40 psi的臂杆压力下可提供35 gal / A的流量，并在上述标准杀菌剂程序之外进行了处理。未接种地块，但依靠天然接种物来确定疾病。 6月4日收集了种子出苗数据，作为每个样地中心两行中每根10线性英尺的出土丘陵数量。 9月9日至16日，用除草剂（Diquat E 1.5 pt /英亩+非离子表面活性剂）杀死了葡萄藤。于9月24日收获地块，分级并评估黑black病发病率。从每个样地中随机选择20个块茎，并目视评估黑皮草的症状（发生率％=有症状块茎的数量/ 20 * 100）。在马铃薯生产季节，汉考克的降雨量为15.0英寸。在马铃薯生产季节，补充灌溉进行了44次，额外灌溉了19.5英寸。

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