Mixing, Application & Calibration

You are filling a spray tank with water from a hose. To prevent pesticide-contaminated tank mixture from back-siphoning into the water source if pressure drops, you should:

• Keep the hose end above the tank's water line, leaving an air gap between the hose and the surface of the mixture ✓
• Rest the hose end down in the tank solution so it fills faster and does not splash
• Increase the water pressure as high as possible while filling the tank
• Use the widest-diameter hose available to shorten the fill time

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What is the primary purpose of calibrating pesticide application equipment?

• To make the equipment spray faster so the job takes less time
• To ensure the equipment applies the pesticide uniformly and at the correct (labeled) rate over the treated area ✓
• To eliminate the need to read or follow the product label rate
• To allow any nozzle or pressure setting to be used interchangeably

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Why is it a problem to apply a pesticide at a rate that is either too low or too high compared with the labeled rate?

• A lower rate works just as well, and a higher rate is always safer for the applicator
• Both too-low and too-high rates speed up the job and reduce overall cost
• Rate only matters for restricted-use pesticides, not for general-use products
• Too little may fail to control the pest, while too much wastes product and can be illegal and harmful to non-target plants, surfaces, or the environment ✓

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