When applying pesticide to a large tree by spraying, what is the recommended sequence?

When applying pesticide to a large tree by spraying, what is the recommended sequence?

• A. Begin spraying by directing a spray up into the interior of the crown, then move to the top portion of the tree and work toward the bottom.
• B. Begin at the lowest branches and move upward to the crown.
• C. Spray evenly from the ground level to the top of the canopy in a single pass.
• D. Start at the outermost branches and work inward toward the trunk.

Answer: (A)

The key idea is to ensure thorough canopy coverage by getting the spray to reach the interior and upper parts of the crown before attending to the lower portions. Directing the spray upward into the interior of the crown helps push droplets into dense foliage and reach inner limbs where pests hide, giving better contact and coverage. After the interior is wetted, moving to the top portion of the tree ensures the highest surfaces are wetted, and finally working downward toward the bottom helps wet the lower branches and any trunk-area surfaces that might otherwise be missed. This sequence minimizes gaps in deposition and reduces the chance of missing pest-harboring areas behind inner growth. Starting at the bottom, spraying upward, or attempting to spray in a single pass from ground level to the top, tends to miss interior foliage and can result in uneven coverage. Beginning at outermost branches and moving inward prioritizes the outer canopy and can neglect interior and upper surfaces.

The key idea is to ensure thorough canopy coverage by getting the spray to reach the interior and upper parts of the crown before attending to the lower portions. Directing the spray upward into the interior of the crown helps push droplets into dense foliage and reach inner limbs where pests hide, giving better contact and coverage. After the interior is wetted, moving to the top portion of the tree ensures the highest surfaces are wetted, and finally working downward toward the bottom helps wet the lower branches and any trunk-area surfaces that might otherwise be missed. This sequence minimizes gaps in deposition and reduces the chance of missing pest-harboring areas behind inner growth.

Starting at the bottom, spraying upward, or attempting to spray in a single pass from ground level to the top, tends to miss interior foliage and can result in uneven coverage. Beginning at outermost branches and moving inward prioritizes the outer canopy and can neglect interior and upper surfaces.