Spraying Large Nut Trees – Part 2

This article continues from Part 1. Droplet size Droplet size influences droplet behaviour. The following table lists the pros and cons to changing droplet size when overall spray volume (e.g. L/ha) remains constant. Relative Spray Quality Pros Cons Coarser Droplets Lower drift potential because they resist deflection by wind and evaporation from heat and low […]

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Spraying Large Nut Trees – Part 1

Introduction I’ve studied spray applications in a diversity of crops, both broad acre and specialty, but perhaps nothing is as challenging large tree nut canopies. Australia’s macadamia orchards can form >10 metre high, >4 metre deep canopy walls! So in writing this article I face the opposite situation I normally encounter when advising on airblast […]

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Tower Power

Are you considering shelling out for a tower extension for your airblast sprayer? Spray towers are an excellent investment, but they warrant special consideration. Towers move the air and nozzles closer to the target compared to the curved booms on a conventional airblast sprayer. When the distance-to-target is reduced, the odds of droplets reaching the […]

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Nozzle Sizing and Calibration Charts

Application Chart (metric)

Need to find the right nozzle size for your application?  Sometimes a simple chart is the easiest way to figure things out.  Print it and place it in your sprayer cab. In this chart, identify your water volume along the top row, and follow the column until you encounter the travel speeds you’re interested in. […]

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Exploding Sprayer Myths (ep.9): Airblast Air

In this, the season three finale of Exploding Sprayer Myths, we join Jason and the Tom-inator as they “tackle” airblast air settings. There are a whole suite of articles dedicated to this topic, linked below the video. It is, arguably, the most important adjustment you can make to an airblast sprayer. Will there be more […]

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