Comparing three brands of water sensitive paper

Introduction Spray coverage describes the degree of contact between spray droplets and the target surface area. This metric can be used to predict the success of an application. One of the easiest methods for visualizing coverage is to use water sensitive paper (WSP), which is a passive, artificial collector that turns from yellow to blue […]

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How to Size a Nozzle for Pulse Width Modulation (PWM)

PWM is gaining popularity, and there is an ever-increasing number of first-time users that need to make nozzle selections for their system. We’ve written about it here, here, and here. Recall the PWM replaces spray pressure with Duty Cycle (DC) of a pulsing solenoid as the primary means of controlling nozzle flow. The Duty Cycle […]

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Fundamentals of Spray Drift

The year 1989 marked my first spray drift trial under the watchful eye of Dr. Raj Grover and John Maybank. We evaluated the performance of several spray shrouds, Flexi-Coil, AgShield, Brandt, and Rogers, and wanted to measure just how effective they were. But in my heart I wasn’t interested in drift. I wanted to study […]

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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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Paint it black

Never fail, as spring turns to summer we get questions about algal growth in water tanks. There are lots of suggested solutions, but questions about pH antagonism and phytotoxicity seem to linger. We’re planning trials for this summer (2021) to explore how well copper pipe, copper wire, copper sulfate, citric acid and chlorine pucks work, […]

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