The larger the spray material droplet, the more subject it is to lateral movement of wind at 1 mile per hour.

When considering the behavior of spray material droplets in relation to wind, it's important to understand that larger droplets have a tendency to resist lateral movement more effectively than smaller droplets. Larger droplets possess greater mass and inertia, which helps them maintain their trajectory despite wind currents.

In contrast, smaller droplets are more susceptible to being carried off course by even light winds, as they have less mass and are more easily influenced by wind shear. Therefore, the assertion that larger spray droplets are more subject to lateral movement in wind is inaccurate. Consequently, the statement is false, affirming that larger droplets are actually less affected by wind at low speeds. Understanding this principle is critical for aerial application practices, as it influences both the efficacy of pesticide placement and the potential for off-target drift.