Spray Tips with Tom Wolf — Ep. 3: Choosing nozzles for diverse applications

After running through your sprayer’s routine maintenance, it’s time to assess the suitability of its nozzles for upcoming applications, and, let’s face it, that decision can be pretty complicated. Besides the typical competition between manufacturers, you also have to consider spray quality. Do you want coarse droplets? Fine droplets? Air induction nozzles? Twin-fan nozzles? How many gallons of water will you need per acre? Are the nozzles you want readily available and replaceable?

“I have three spots for different nozzles on my new sprayer. I want burn-off, in-crop and fungicide; what three should I have (5-15gal/acre)?”

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In this video, Tom Wolf of AgriMetrix Research & Training discusses the attributes of some of the best of Canada’s spray nozzles, providing a visual demonstration of their differences, and thoughts on nozzle selection for pre-seed, in-crop and fungicide spray applications.

2 thoughts on “Spray Tips with Tom Wolf — Ep. 3: Choosing nozzles for diverse applications

  1. Mr. Wolf,

    I’ve see a couple of tutorials you’ve done on realagriculture.com with Mr. Spieser. In one of those, you’re saying that Floodjet are way better for Wheat (& Barley I Guest) fungicide application. My question is : Do you think I’ll get better result by using the T-fitting you’ve use in the self-propelled sprayer video to modify angle of Spraying. I’ll use the T-fitting to orientate 2 FloodJet Nozzles (1 backward & 1 forward) on EVERY 20 inches.

    Do you think I’ll get more accuracy and better fungicide distribution by using this technique ?

    I grow 500 acres of wheat and 500 acres of barley every year using Prosaro & Caramba on 100 % of crops.

    I appreciate tips you’re giving to growers like me. Thanks !!

    William Pinard-Therrien
    Ferme Des Cent Lieues

    1. Dear William,

      In our research trials in Saskatoon, we had similar results to the work done in Ridgetown: we found that with a coarser spray and a more aggressive forward or backward angle on that spray, we obtained greater spray deposits on vertical surfaces such as wheat heads. We didn’t find the same benefit for leaves further down the canopy. So the angled spray configurations are mainly intended for diseases such as fusarium head blight.

      No matter what disease, we still need to pay attention to the how much water volume we apply with these coarse sprays, because they offer fewer droplets for coverage than a finer spray at the same water volume. So keep fairly high water volumes for this approach. Another observation was that lower boom heights were necessary for the coarse angled sprays to have a deposition advantage.

      The work using Turbo FloodJets was done with Dr. David Hooker at Ridgetown, and I’ve invited him to add his observations to help you make a decision.


      Dr. Hooker adds:

      Hello William — I agree completely with Tom on every point. The aggressive angle is the key to coverage on wheat heads (10-15 degrees from horizontal). The only use for the “T” would be as a vertical drop to clear the iron on the spray boom. We have found that leaf coverage is still excellent in the upper portion of the canopy while targeting heads for FHB; those are the leaves that need the coverage for protection anyway.

      Thanks for asking!


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