Reduced drift from air-assisted spraying

Field trials were conducted in 1994 and 1995 to compare spray drift produce d by two spraying techniques. A hydraulic boom sprayer providing both air-a ssisted and conventional spraying was used for two reduced-volume applicati ons. For each treatment, 14 trials were conducted over short grass under wi nd conditions varying from 1 to 5 mis, measured 2 m above the ground. Drift was measured on a 8 m tower, 10 m away from the boom sprayer. Results show ed that air-assisted spraying combined with use of coarser spray provided s ignificantly less drift under wind conditions of 5 m/s compared to conventi onal spraying under a wind of 1 m/s.