What’s with dew? – Tips #9

Tips with Tom - Title

When warm air is cooled, it loses some of its moisture-holding capabilities. This change often occurs at night, when plants (and other objects) cool. Once the temperature of the surface of the leaves, for example, drops below the dewpoint, it causes water to condense, forming the shiny dew that causes so many to question early […]

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Airblast nozzle bodies

A typical brass roll-over style dual nozzle body with Cap and optional check valve.

Excepting air shear and centrifugal style nozzles, most airblast sprayers employ nozzle bodies distributed evenly along the booms. Nozzle caps compress the nozzle against the body to force the spray mix through the nozzle orifice. Nozzle bodies are not all created equal. Double Outlet Roll-Over Nozzle Bodies Double outlet roll-over bodies (pictured below) allow the […]

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Exploding Sprayer Myths (ep.10): Airblast Coverage

Here in Episode 10 of Exploding Sprayer Myths we’ve coaxed @Nozzle_Guy back into the orchard. This is part two of a two-part mini series on airblast calibration. In Episode 9 we talked about air settings and travel speed, and now we’re tackling nozzling and coverage. But here’s the twist: Rather than use spray math to […]

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The Challenges of Spraying by Drone

Spray application by drone is here. It’s common practice in South East Asia, with a very significant proportion of ag areas now treated that way. Estimates from South Korea, for example, suggest about 30% of their ag area being sprayed by drone. It’s in the US, too. The Yamaha RMax and Fazer helicopters, which pioneered […]

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How Airblast Spray Droplets Behave (or Misbehave)

Some pesticide labels require or prohibit certain droplet sizes to reduce the potential for drift. But, even when labels are silent about size restrictions, operators should be aware of the potential for droplet size to affect coverage. In the case of airblast, droplets should be: large enough to survive evaporation between nozzle and target. small […]

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