Clean Your Nozzles

When operators winterize their sprayers, they should remove all the tips and store them separately. Many store them in large pails with lids. Calibrating the sprayer just prior to winterizing will indicate if the nozzles should be stored, or replaced. Let’s assume the tips are still within 5% of the average output, and 5% of the manufacturer’s pressure […]

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Does Higher Pressure Increase Spray Penetration?

This is a coarse droplet - seriously.

A very common question we hear at sprayer demonstrations is: “I want to drive the spray deeper into the canopy – does higher pressure help?” Well, here’s the classic government answer: “…yes and no.” It depends on two things. First, the size of the droplet and second, your tolerance for drift (ours is almost zero, […]

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Spraying in Vegetable Greenhouses

Back in 2011 we toured a few vegetable greenhouses in Southern Ontario. I wanted to learn more about how greenhouses used hydraulic sprayers (i.e. not misting or fogging systems) to apply pesticides to tomatoes, cucumbers and peppers. It was an eye-opening experience for me, because like every commodity group I’ve encountered, they had their own unique […]

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Spray coverage in field tomato

Spraying field tomato is difficult – period. In Ontario, early variety tomato canopies get very dense in July. The inner canopy is relatively still, humid, cool and a perfect environment for diseases such as late blight. It is challenging to deliver fungicides to the inner canopy and this can lead to inadequate disease control. Matters are slightly improved as the […]

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Herbicides in Asparagus – A homegrown solution

An asparagus grower in southern Ontario picked up a used De Cloet Hi-Boy originally used to spray tobacco. His vision was to create a three-row herbicide sprayer for asparagus and I was invited to participate. His concept was to design shrouds that would contain the herbicide, but not snag the asparagus or drag heavily on […]

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