What is the pressure recommended for tall shade trees when applying sprays?

What is the pressure recommended for tall shade trees when applying sprays?

• A. 650 psi at 35-60 gpm.
• B. 500 psi at 20-40 gpm.
• C. 800 psi at 50-70 gpm.
• D. 1000 psi at 60-90 gpm.

Answer: (A)

When spraying tall shade trees, you need enough pressure to push droplets up into the upper canopy and a sufficient spray volume to wet the foliage evenly. A mid-to-high pressure with a moderate-to-high flow achieves this balance, delivering droplets to the upper branches for thorough coverage without creating excessive drift or runoff. Too low a pressure and too little flow won’t reach the top of the tree; too high a pressure with too much flow increases drift and waste. This middle-range combination provides the best chance for complete canopy wetting on tall trees.

When spraying tall shade trees, you need enough pressure to push droplets up into the upper canopy and a sufficient spray volume to wet the foliage evenly. A mid-to-high pressure with a moderate-to-high flow achieves this balance, delivering droplets to the upper branches for thorough coverage without creating excessive drift or runoff. Too low a pressure and too little flow won’t reach the top of the tree; too high a pressure with too much flow increases drift and waste. This middle-range combination provides the best chance for complete canopy wetting on tall trees.