Particle drift potential of mesotrione and rimsulfuron plus thifensulfuron-methyl tank mixture in a low-speed wind tunnel

Particle drift happens during herbicide application when droplets travel outside the intended site. Different nozzles produce various range of droplets, so they play a very important role in coverage and occasions. When small potential for off-target movement is high. Another factor determining particle distance between crops. Wind velocity gives energy to particles move away from target place. Therefore, simulation (mesotrione rimsulfuron plus thifensulfuron-methyl mixture) was done wind tunnel, using different Extended Range (XR) Turbo TeeJet Induction (TTI). The speed set at 4.4 m/s–1, representing least favourable conditions where applications are possible. In eight crops (cantaloupe, cotton, green bean, pumpkin, soybean, sunflower, wheat, watermelon) were positioned 4, 6, 9, 12 m downwind distances nozzle, simulated. Following treatments, plants returned greenhouse 28 days, biomass reduction recorded. Artificial collectors (Mylar cards) water sensitive cards positioned plants. According obtained results, spraying with XR nozzle influences higher injuries than TTI nozzle. Tracer deposition all used. Accordingly, droplet numbers, covered area, Volume Median Diameter (VMD), on As consequence, occurred most cantaloupe, pumpkin while tolerant soybean wheat.