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首页> 外文会议>Symposium on Pesticide Formulations and Application Systems: A New Century for Agricultural Formulations, Twenty First Volume, Oct 24-26, 2000, Orlando, Florida >Spray Deposition Effect on Abscission Efficacy of CMN-Pyrazole in Harvesting Oranges
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Spray Deposition Effect on Abscission Efficacy of CMN-Pyrazole in Harvesting Oranges

机译：喷雾沉积对橘子收获中CMN-吡唑的脱落功效的影响

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The objective of this research was to determine the relationship between spray deposition and abscission efficacy of (CMN-Pyrazole), in mechanical harvesting of the 'Hamlin' orange. Two tests were conducted on 1/6/00 and 2/11/00 using an air-blast tower sprayer. The sprayer was equipped with an axial-flow fan and hydraulic nozzles. The trees were sprayed at three nozzle arrangements so that 3/4, 1/2, or 1/4 of the total discharge was directed to the upper half of the tree canopy and the rest to the lower half. Spray mixtures, containing CMN-Pyrazole (Release~(~R)), adjuvant Kinetic, and a fluorescent tracer, were applied at 2.6 km/h, 3,750 L/ha and 4.0 km/h, 2,450 L/ha, in the first and second tests, respectively. Leaf samples were collected from different canopy locations and spray deposition was quantified by fluorometry. Four to five days after the applications, fruit detachment force (FDF) was measured, dropped fruit was counted, the trees were shaken with a trunk shaker, and percentage of fruit removal was determined. Mean canopy deposition was similar for all treatments. Deposition at different canopy heights was not proportional to the amount of spray directed to that height. The situation was improved in the second experiment, probably due to the lower application rate and reduced runoff. There was no difference in deposition between two sides of the canopy. Outside canopy deposition was higher than inner canopy deposition in most locations. In general, spray applications were effective in reducing FDF. There was stronger correlation between spray deposition and FDF in the second test. FDF was higher in the upper canopy compared to lower locations in the unsprayed control trees. Fruit removal efficiencies of sprayed trees were significantly higher than those of the unsprayed control in the second test.
机译：这项研究的目的是确定在“哈姆林”橙的机械收割过程中，喷雾沉积与（CMN-吡唑）的脱落功效之间的关系。使用鼓风塔喷雾器在1/6/00和2/11/00进行了两次测试。喷涂机配备了轴流风扇和液压喷嘴。用三个喷嘴布置对树木进行喷雾，以使总排放量的3 / 4、1 / 2或1/4指向树冠的上半部分，其余部分则指向下半部分。第一次以2.6 km / h，3,750 L / ha和4.0 km / h，2,450 L / ha的浓度喷涂含有CMN-吡唑（Release〜（R）），佐剂Kinetic和荧光示踪剂的喷雾混合物。和第二次测试。从不同的树冠位置收集叶片样品，并通过荧光定量定量喷雾沉积。施用后四到五天，测量果实分离力（FDF），计算落果数，用树干振动器摇晃树木，并确定去除水果的百分比。所有处理的平均冠层沉积均相似。在不同的树冠高度处沉积与成比例地喷射到该高度上的喷雾量不成比例。在第二个实验中，情况有所改善，可能是由于较低的施药量和减少的径流。顶篷两侧之间的沉积没有差异。在大多数位置，外冠层沉积均高于内冠层沉积。通常，喷涂可有效减少FDF。在第二个测试中，喷雾沉积和FDF之间存在更强的相关性。与未喷洒的对照树的下部位置相比，上部冠层的FDF较高。在第二次测试中，喷洒的树木的水果去除效率显着高于未喷洒的对照。

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