Angled sprays

When T3 wheat rears its head, the first rainy day brings questions about spray angles. Let’s begin with a graphic that illustrates how angled sprays cover a vertical target like a wheat head. Assuming moderate wind and sufficiently large droplets, this is a simplified depiction of what we would expect to see. But is this […]

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Methods for applying fungicides in corn

This work was performed with Albert Tenuta (OMAFRA) and David C. Hooker (University of Guelph, Ridgetown). Objective Gibberella ear rot is a significant disease that reduces the quality of grain corn, especially with the accumulation of mycotoxins produced from the causal pathogen(s). With crop management practices providing only modest improvements in disease control, strategies to increase […]

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Developing Criteria for the Ideal Agricultural Spray – a Biologist’s Perspective

Originally published in: Wolf, T.M. and Downer, R.A. ILASS Americas, 11th Annual Conference on Liquid Atomization and Spray Systems, Sacramento, CA, May, 1998 Note to reader: It’s been nearly 23 years since we wrote this paper at the invitation of organizers of the Institute for Liquid Atomization and Spray Systems Conference. At the time, custom […]

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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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Don’t try this tempting shortcut

There’s a call that I’ve been getting for 20 years now. It came again this week. Someone has a twincap with two small air-induced tips, and they’re applying herbicides and fungicides with low water volumes, often 5 gpa, sometimes less. They call because they want to know how much wind they can spray in. Is […]

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