Author: Jason Deveau (Spray Guy)

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About Jason Deveau (Spray Guy)
Dr. Jason Deveau has been the OMAFA Application Technology Specialist since 2008. He researches and teaches methods to improve the safe, effective and efficient application of agricultural sprays in specialty crops, field crops and controlled environments. He is the co-administrator of Sprayers101, co-author of the Airblast101 Textbook, a slow cyclist and an even slower runner.

Posts by Jason Deveau (Spray Guy)

The Micothon M2 – The benefit of air-assist spraying in a vegetable greenhouse

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I’ve experienced a few spectacular failures trying to build niche sprayers. Until now, I haven’t had a reason to write much about them. But I decided the contrast, and confession, would be a fun way to set the scene for a discussion about an excellent niche sprayer. Failed Attempts First, the ill-fated “Hops Sprayer”. We […]

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Canada Gazette Part II – Recent and upcoming changes to Canadian rules for operating Remote Piloted Aerial Systems

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Editor’s Note: This article was posted in June 2025, and as of November 4th all rules have now come into effect. Summary The Government of Canada introduced the first set of Remote Piloted Aerial Systems (RPAS) rules in 2019, which addressed safety concerns and created a flexible and predictable environment for small RPAS flown within […]

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Exploring the accuracy of drone-applied herbicide treatments

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Author’s note: Minor edits were made to this article on December 12, 2025. While the results remain unchanged, aspects of the interpretation have been adjusted upon reflection. In 2024, Corteva conducted a study entitled “Drone-Delivered Herbicides: Comparing Lontrel XC (Clopyralid) Efficacy Across Application Techniques and Water Volumes”. Their objective was to compare the relative efficacy […]

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Comparing Fluorescent Dyes for Spray Coverage Evaluation

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I work in agricultural extension and I’m always on the lookout for new methods to help me achieve my goals. A big part of my job is to research and teach efficient, effective and safe crop protection practices, so it follows that I have to be able to evaluate the quality of a spray application. […]

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DJI Agras T100 – First Impressions

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On July 15, 2025, DJI Agriculture announced the global launch of the DJI Agras T100. Compared to its predecessor, the T50, it features a larger payload for spraying and spreading and can fly at approximately twice the speed. The rotary atomizer-style nozzles (which DJI refers to as sprinklers) produce comparatively increased flow with an option […]

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