Establishing an optimal airblast carrier volume

Thanks to Mark Ledebuhr of Application Insight LLC for his contributions to this article. North American product labels may or may not include carrier volume recommendations. When they do, it could be based on a two-dimensional value like the planted area, or perhaps on row length which is more appropriate for trellised crops that form […]

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Crop-Adapted Spraying – A Multiyear Study in Highbush Blueberry (2021 Update)

This work was performed with Erica Pate, OMAFRA Fruit Crop Specialist This case study took place on a 15 acre highbush blueberry operation in southern Ontario. In 2016, considerable pressure from spotted-wing drosophila (SWD) prompted the growers to make changes to their crop management practices and their spray program. They employed a three-pronged approach to […]

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Spray and Soil Fumigant Buffer Zones in Canada

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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Three manageable factors that affect spray drift

In 2014 one of our OMAFRA summer students designed a short-and-gritty demonstration using a backpack sprayer, a variable-speed fan and some water-sensitive paper positioned downwind at 1.5 metre intervals. The intent was to illustrate how sprayer operators could reduce the potential for off-target drift by recognizing and accounting for three factors: Apparent wind speed (i.e. […]

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