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Evaluation of experimental and registered cover spray fungicide combinations for disease control on York apple, 2014

机译:2014年约克苹果病虫害防治实验性和注册性盖剂杀菌剂组合评估

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Thirteen registered and experimental treatments applied in summer schedules were compared during the mid-season cover spray period on 15-yr-old trees. The test was conducted in a randomized block design with four single-tree replicates separated by in-row border trees. No fungicides were applied until the first treatment application date 9 May. Dilute treatments were applied to the point of runoff with a single nozzle handgun at 350 psi as petal fall- sixth cover sprays: 9 May (petal fall); first-sixth covers: 19 May, 6 Jun, 20 Jun, 8 Jul, 29 Jul, and 20 Aug. All diseases developed from inoculum naturally present in the test area. Foliar data are based on six shoots per rep 3 Sep; only leaves younger than the 6th leaf, (corresponding approximately to the time of the first treatment application), were counted. Fruit data are based on 25-fruit sample per rep harvested 8 Oct and held at ambient temperatures (5 8-80°F, mean 71.3°F); first evaluated 27 Oct, then re-evaluated for post-storage rots 6 Nov. Maintenance materials applied to the entire test block included: Admire Pro, Altacor, Assail Asana XL, Biocover MLT, Delegate, Imidan Lannate LV, Provado and Scorpion. Percentage data were converted by the square root arcsin transformation for statistical analysis.
机译:在15年前的树木的中期遮盖喷雾期,比较了夏季时间表中使用的13种注册和实验处理方法。该测试以随机区组设计进行,其中四个单树重复项被行内边界树分隔开。直到5月9日第一个治疗日才使用杀菌剂。当花瓣落下时,用单喷嘴手枪在350 psi下对径流点进行稀释处理。前六次覆盖:5月19日,6月6日,6月20日,7月8日,7月29日和8月20日。所有疾病均由测试区自然存在的接种物引起。叶面数据基于9月3日每个代表的6枝芽;仅计数比第六片年轻的叶片(大约与第一次处理时间相对应)。水果数据基于10月8日收获的每份代表的25个水果样品并保持在环境温度(5 8-80°F,平均71.3°F)下;首先评估10月27日,然后再评估11月6日的储存后腐烂。应用于整个测试块的维护材料包括:Admire Pro,Altacor,Assail Asana XL,Biocover MLT,Delegate,Imidan Lannate LV,Provado和Scorpion。百分比数据通过平方根反正弦变换进行转换以进行统计分析。

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