Spray and Soil Fumigant Buffer Zones in Canada

Buffer zones or No-Spray zones physically separate the end of the spray swath for the nearest downwind sensitive area.

Spray Buffer Zones Spray buffer zones are no-spray areas required at the time of application between the area being treated and the closest downwind edge of a sensitive terrestrial or aquatic habitat. Spray buffer zones reduce the amount of spray drift that enters downwind, non-target areas. Sensitive Terrestrial Habitats Sensitive terrestrial habitats can include hedgerows, […]

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Ten Tips for Spraying in the Wind

Choosing the right time to spray can be tricky. Our gut tells us that spraying when it’s windy is wrong.  The experts tell us that spraying when it’s calm is wrong. So when can you actually spray? I’ve always advised my clients to spray in some wind, because it has a few advantages. The main […]

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We Need Better Drift Control Technologies

Sprayer manufacturers have all but offloaded the entire responsibility for drift management to the sprayer nozzle. It’s asking too much. Sprayers have changed a lot over the past 25 years. They have become larger, with more tank capacity, boom width, and, if self-propelled, horsepower.  They are more comfortable and ergonomic, with more sophisticated swath control […]

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Spraying Weather

It’s time to spray and what’s the first thing you do? Check the weather forecast, of course. More often than not, the suitability of the weather is the main factor in the decision to spray. Let’s have a closer look at what each weather component contributes to the decision. Wind: Everyone knows that small droplets […]

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Thermal Inversions for Sprayer Operators

The Earth’s Atmosphere. The illustration of the Earth is to scale, but the landscape is not. Our focus in on the Surface Boundary Layer.

In April 2014, NDSU extension published an excellent factsheet explaining what thermal inversions are, how to detect them and how they affect pesticide spray drift. That factsheet inspired this article. The Atmosphere The Earth is surrounded by a layer of air called the atmosphere. Think of it as a sheet of liquid percolating and flowing […]

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