Illinois Pesticide Applicator Exam Chapter 6 equipment and drift reduction questions with correct answers

Other ways to reduce drift Correct Answer-1. use drift reduction adjuvants which increase droplet size ll pressure monitoring/ regulating devices 3. use weather meter fro specific data ase spray application rate. usually means using larger office size in nozzles which increases droplet size 5. use less volatile formulations when available 5. keep up to date with pesticide application technology What are weather factors that influence drift? Correct Answer-1. Wind speed. Do not spray in winds greater than 10mph. high wind speeds increase drift. spray particles carried greater distance 2. Wind direction. check downwind for sensitive areas. drift occurs downwind of application. use buffer zones if prescribed by label. rature and humidity. high temperatures and low humidity increase evaporation. increased evaporation reduces droplet size increasing drift potential. 4. no wind conditions and inversions. small droplets remain suspended in air. can move off target long distances. What are equipment factors that influence drift? Correct Answer-1. Droplet quality/application rate. A nozzle with a larger droplet spectrum( makes fewer smaller droplets) will generally reduce drift. Orfice size also helps determine droplet size. 2. Automatic Rate controllers. Using a lower pressure will reduce drift potential. Higher pressure results in smaller droplets. Automatic rate controllers increase pressure with increase in speed