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期 刊 ：植物保护学报 2012年

关键词：雾滴密度；喷雾方式；毒死蜱；褐飞虱；防治效果；

Keywords:droplet density, spray method, chlorpyrifos, Nilaparvata lugens, control efficacy,

摘 要 ：分别选用实心圆锥雾和扇形雾TP6501E两种喷头,以3WP-2000型行走式喷雾塔模拟对水稻植株压顶喷雾和侧向喷雾,探究雾滴密度、喷雾方式对48%毒死蜱乳油防治褐飞虱效果的影响。结果表明:压顶喷雾当底层雾滴密度分别达到99.4个/cm² 和94.9个/cm²,且48%毒死蜱乳油有效剂量分别高于68.00 mg/m²和55.64 mg/m²时,对褐飞虱的防治效果达80%;侧向喷雾当底层雾滴密度分别在10.4~49.0个/cm²和12.3~55.4个/cm²范围内,且48%毒死蜱乳油有效剂量分别在41.21~82.42 mg/m² 和72.12~82.42 mg/m²区间内对褐飞虱的防治效果均高于80%。相同有效剂量条件下,侧向喷雾的防效高于压顶喷雾。采用侧向喷雾方式时,水稻基部较易获得高密度雾滴,药剂在低有效剂量条件下即可取得预期防治效果。

Abstract:The influence of the droplet densities and spray methods on the control efficiency of 48% chlorpyrifos EC against the brown planthopper, Nilaparvata lugens, was investigated using the spray tower of 3WP-2000 choosing cone nozzle and fan nozzle TP6501E. The results showed that the control efficacy might attain 80% when the densities reached 99.4 particle/cm² and 94.9 particle/cm² respectively, while the effective dose of 48% chlorpyrifos EC were above 68.00 mg/m² and 55.64 mg/m² respectively when spray downwards. The efficacy all exceeded 80% when the droplet densities were 10.4-49.0 particle/cm² and 12.3-55.4 particle/cm² respectively, and the effective dose of 48% chlorpyrifos EC were 41.21-82.42 mg/m² and 72.12-82.42 mg/m² respectively when spray laterally. The control efficacy of spraying laterally was significant higher than that of spraying downwards with the same effective dose. The base of rice can easily get high droplet density to ensure satisfactory efficiency at low dose when spray laterally.

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