Illinois Right-Of-Way Pesticide Applicator Practice Exam

Question: 1 / 400

What does VMD stand for in relation to spray application?

Volume measurement density

Volume median diameter

Volume median diameter refers to the diameter of droplets in a spray application at which 50% of the total spray volume consists of smaller droplets and 50% consists of larger droplets. This measurement is crucial in pesticide application as it helps determine the effectiveness and safety of the spray. Smaller droplets may drift more and affect non-target areas, while larger droplets may lead to uneven coverage. Understanding VMD provides applicators with the information needed to calibrate their equipment effectively, choose appropriate nozzle types, and apply pesticides in a way that maximizes efficacy while minimizing environmental impact.

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Variable median dimension

Vapor medium distribution

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