Comparing Fluorescent Dyes for Spray Coverage Evaluation

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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Where does fungicide spraying fit into Integrated Pest Management? An apple scab case study

Editor’s note: This article originally appeared in the Winter, 2025 ONCore newsletter (Volume 29, Issue 1). We thought it was an excellent description of the integrated pest management process and where fungicide spraying fits in. It’s been modified from the original version. Part One: Know Your Enemy There is no denying that product efficacy and […]

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Airblast Productivity and Work Rate Calculator

There are many factors that affect the work rate of an airblast application. If an operator can improve their work rate, without compromising spray efficacy or safety, they improve operational efficiency and save money. But how does each variable factor in? Is it worth the cost of a tender truck and operator to fill more […]

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Mode of Action and Spray Quality

The decision on which application method is best for herbicides boils down to two main factors: (a) target type and (b) mode of action. In general, it’s easier for sprays to stick to broadleaf plants on account of their comparatively larger leaf size and better wettability compared to grassy plants. There are exceptions, of course […]

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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 solenoid shuts […]

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