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

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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Three manageable factors that affect spray drift

It’s not only field sprayers that drift. Photo Credit – G. Amos and D. Zamora, Washington State.

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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How to read a water quality test result

It’s common advice: Test your water before using it as a spray carrier. You dutifully sample the well or dugout and await lab results. And what comes back is a whole lot of numbers. How to make sense of it all? All three of these tests report a large number of properties and identify specific […]

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Adjuvants – A Primer

Spreader/Surfactant penetrating wax paper to get to water-sensitive paper.

We can always count on receiving regular questions about tank mixes but in recent years we’re hearing more about adjuvants. Many pesticides are already formulated with a variety of adjuvants. Perhaps they are intended to improve shelf-stability, or mixing and/or product performance. A pesticide label may specify a particular name brand or generalize a category […]

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