For sale: Gently used 1950s boom sprayer

This article isn’t about best practices, or social contracts, or innovative new technologies. It’s just a fascinating bit of history. If it has any moral at all, perhaps it’s to remember where we came from. I wonder where we’ll be tomorrow? Let’s be clear – the practices described in this article are anachronistic and while […]

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The Most Important Developments in Spraying

Some things have improved a lot. Others have lost ground. Some years ago, a few of us weed scientists sat around a table and debated the most important developments in agriculture in our lifetimes. It was a great discussion, and we arrived at a few that included direct seeding (for its soil and moisture conservation […]

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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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Perspective on rates, volumes and coverage

This short article is a thought exercise designed to give some perspective on chemical rates, carrier volumes and the foliar area we expect them to protect. Imagine we are spraying the fungicide Captan on highbush blueberry. In Canada, the label rate is to apply 2kg/ha (28.5oz/ac) of planted area. Captan is 80% active ingredient, so […]

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Ground vs Aerial Application of Fungicide in Chickpeas

This article was originally published in the Proceedings of the Soils and Crops Workshop, 2005. Authors Tom Wolf (AAFC), Brian Caldwell (AAFC), Cheryl Cho (CDC), Sabine Banniza (CDC), Yantai Gan (AAFC) Background: Fungicide application is an important disease management strategy for ascochyta blight (caused by Ascochyta rabiei) in chickpea due to the poor host resistance […]

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