Sure-fire tips to buy right nozzles for job
Sprayers and equipment for sprayers are a major draw at the National Farm Machinery Show in Louisville, Ky. One reader says he’s going there to buy sprayer tips. He would like to buy one set of tips. He’ll spray Bicep early, then either glyphosate or glufos-inate on herbicide-tolerant hybrids.
Jeff Nagel, an agronomist with Ceres Solutions, Lafayette, is one of three Indiana Certified Crop Advisers offering advice. “You could choose a tip that would allow you to spray both Bicep and glyphosate, but not Ignite [glufosinate],” Nagel says. For example, Spraying Systems Turbo TeeJet, AIXR or AI TeeJet nozzle all could be used for the first two applications. “They produce larger droplets that work well for soil applications and reduce drift for post glyphosate applications,” he explains.
• Finding one tip for all applications is nearly an impossible task.
• Tips that produce larger droplets are ideal for glyphosate applications.
• Ignite (glufosinate) applications require tips that deliver better coverage.
Ignite is a contact herbicide. Coverage is key. A spray volume of 15 to 20 gallons per acre and a nozzle that produces medium-sized droplets at 40 to 60 pounds per square inch is recommended. Nagel suggests a TeeJet XR or XRC tip.
Air induction nozzles
It’s possible to use one tip, but doing so might cost you big bucks later. That’s why Darrell Shemwell, branch manager of the Posey County Co-op, Poseyville, says there’s a better solution.
For glyphosate, he leans toward nozzles that produce coarser droplets, such as air induction nozzles.
“Controlling drift is always a huge factor,” Shemwell says. “This is where air induction nozzles really help, but [they] don’t always give you the best coverage.”
Greg Kneubuhler also sees a good fit for air induction nozzles. “An air-fluid mixture forms a larger droplet, reducing potential for drift,” he notes. Kneubuhler operates G & K Concepts Inc., Harlan. Maintain at least 40 psi to deliver a uniform spray pattern, he urges.
Herbicide type affects choice
In general, systematic herbicides perform well with lower-drift tips, Shemwell says. These include glyphosate, plant growth regulators and ALS inhibitors. To control large perennial weeds, increase spray volume above 10 gallons per acre.
Flat-fan tips are more appropriate for contact herbicides. These include Gramoxone and Ignite (glufosinate).
This article published in the February, 2010 edition of INDIANA PRAIRIE FARMER.