中国农业科学2012，Vol.45Issue(4)：666-674,9.DOI:10.3864/j.issn.0578-1752.2012.04.007
雾滴密度及大小对氯虫苯甲酰胺防治稻纵卷叶螟效果的影响
Effects of Droplet Density and Droplet Size on Control Efficiency of Chlorantraniliprole Against Cnaphalocrocis medinalis ( Guenée )
摘要
Abstract
[Objective] The objective of this study is to analyze the effect of spray droplet density and droplet size on the control efficiency of chlorantraniliprole against Cnaphalocrocis medinalis under the conditions of different doses, and to provide a scientific basis for efficient use of pesticides in rice field. [Method] Volumetric application rate was simulated using an automatic drive spraying tower. The surfactant was added to ensure that the chlorantraniliprole solution at different concentrations could provide equivalent wetting and spreading capacity on the rice leaf. The droplet density collected on the water sensitive paper was measured using the image processing method. [Result] The control efficiency could be improved significantly with the increase of droplet density when the chlorantraniliprole dose was about 2.00 mg·m-2. When the dose was increased to 4.00 mg·m-2 and the droplet density of VMD 200 μm and VMD 75 μm were 26.06 and 66.96 droplets/cm2 respectively, the control efficiency was quite with the higher droplet density treatments. When the droplet density of VMD 200 urn reached 82.09 droplets/cm2, the control efficiency was not reduced with the dose from 4 mg·m-2 to 2 mg·m-2. Likewise, when the droplet density of VMD 75 μm reached 140.06 droplets/cm2, the control efficiency was not reduced with the dose decreased from 4.00 mg·m-2 to 2.50 mg·m-2. Spraying of chlorantraniliprole solution with the same carrier volume and concentration, VMD 75 um nozzle increased the droplets density and improved the control effects. [Conclusion] Droplet density was closely related to the control efficiency of chlorantraniliprole against Cnaphalocrocis medinalis when the effective dose was relatively low. When the droplet density reached a certain quantity, the desired effect could still be obtained when the effective dose was decreased. During low spray volume, the control efficiencycould be improved by decreasing droplet size which increased droplet density.关键词
氯虫苯甲酰胺/稻纵卷叶螟/表面张力/剂量/雾滴密度/雾滴大小Key words
chlorantraniliprole/Cnaphalocrocis medinalis (Guenee)/surface tension/dose/droplet density/droplet size引用本文复制引用
徐德进,顾中言,徐广春,许小龙,董玉轩..雾滴密度及大小对氯虫苯甲酰胺防治稻纵卷叶螟效果的影响[J].中国农业科学,2012,45(4):666-674,9.基金项目
国家公益性行业(农业)科研专项(200903033)、江苏省农业科技自主创新项目(CX (11) 2034) （农业）
