1.1 本试验方法用于在模拟现场地面应用条件下，表征农药喷雾降漂移助剂在喷雾液滴大小光谱、细粉体积和其他使用参数方面的性能。本试验方法不包括评估泵剪切是否会降低喷雾沉降减少助剂性能的任何程序。 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 注1: 该方法使用行业标准单位。为了方便起见，提供了以下到国际单位制的转换: 1英里/小时=1.61公里/小时；1英寸=2.54厘米；1加仑/英亩=9.36升/公顷。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 农药施用过程中最小化漂移的农药法规通常要求在规定的液滴大小条件下使用活性成分（a.i.）产品。关于雾滴和颗粒在目标表面的传输和沉积的喷雾性能以及预期应用的产品功效也受到雾滴尺寸谱的影响。在这种情况下，应了解减小漂移助剂对液滴尺寸谱的影响。本试验方法描述了可进行的标准试验，以调查农药喷雾飘移减少佐剂在模拟现场使用条件下的性能，以便在整个喷雾过程中做出飘移管理决策。 测量到的可漂移细粒减少量和喷雾液滴大小分布的变化可用于减少监管机构规定的缓冲区。

1.1 This test method is used to characterize the performance of pesticide spray drift reduction adjuvants with respect to spray droplet size spectra, volume of fines, and other use parameters under simulated field ground application conditions. This test method does not include any procedures to evaluate if pump shear degrades the performance of the spray drift reduction adjuvant. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. Note 1: This method uses industry-standard units. The following conversions to SI units are provided for convenience: 1 mph = 1.61 kph; 1 in = 2.54 cm; 1 gal/acre = 9.36 L/hectare. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Pesticide regulations for the minimization of drift during pesticide application often require active ingredient (a.i.) product use under defined droplet size conditions. Spray performance with respect to transport and deposition of droplets and particles at target surfaces and product efficacy for desired applications are also affected by droplet size spectra. The effect of drift reduction adjuvants on droplet size spectra should be understood in this context. The present test method describes standard tests that can be conducted to investigate the performance of pesticide spray drift reduction adjuvants under simulated field use conditions for drift management decisions in the context of the entire spraying process. The measured reduction in driftable fines and shift in spray droplet size distribution can be used to reduce the buffer zones mandated by regulatory agencies.