Range-resolved lidar systems, principally the elastic ones, have been used in a number of studies for pesticide spray drift monitoring in both aerial and ground spray treatments (Gregorio et al., 2011). In most cases, lidar was used to study the movement and dispersion of the pesticide plumes at a qualitative level. However, the application of lidar to quantify droplet concentration in pesticide clouds has scarcely been addressed before (Hiscox et al., 2006; Khot et al., 2011). This article shows an experimental study of the relationship between spray drift measurements obtained with an elastic-backscatter lidar system and those obtained using passive collectors.

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