Operator Safety: How to Avoid Pesticide Hazards

Pesticide Warning Symbols

A Veteran Applicator’s Questions about Pesticide Handling Time and again, after years of working with dozens of different chemicals, I would wonder to myself “How dangerous is this chemical?”, “Is glyphosate as safe as they say it is?”, “How do I find out what type of safety gear I need while handling this chemical?” Beyond the agrichemical […]

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Pressure Changes Spray Angles – A Lot!

Soybean demo plot sprayed with a contact herbicide using 110 degree air induction flat fans at 20 psi. The collapsed spray pattern did not overlap sufficiently to burn the entire crop down, leaving a striped pattern and demonstrating the poor coverage.

When a nozzle catalogue states that a nozzle produces an 80˚ or 110˚ fan throughout a given pressure range, the reader (rightfully) assumes it to be true. Unfortunately, this is not always the case. To illustrate this, I assembled a collection of red, flat fan nozzles (‘04s). They represented a variety of spray qualities and […]

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Spray Quality and Volume Matrix

We often write about how valuable water sensitive paper can be to visualize and assess the coverage we’re getting from a specific application method.  A handy reference is this matrix that combines both factors.  Print it and use it in the field to compare what your application method is doing to these relative standards.  On average, […]

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Sprayer Tank Cleanout

With in-crop spraying right around the corner, sprayer tank clean out is an important topic to address on your farm. Many farms have done the same clean-out routine for years and not had any issues with contaminating residues in the tank resulting in crop damage. Although the old saying “If it ain’t broke, don’t fix […]

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Measuring Pressure Drop

All sprayers experience a drop in pressure as the solution moves further away from the pump.  Here’s why that’s important, and how to measure it. Optimal nozzle operation in terms of spray quality and fan angle is closely tied to spray pressure.  As we try to maximize travel speed range with a modern sprayer, we […]

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