What is a characteristic of nozzles in aquatic weed control that helps improve coverage?

A hollow cone design in nozzles is specifically advantageous for improving coverage in aquatic weed control applications. This design emits a fine, fan-shaped spray that allows for better distribution of the pesticide over a larger area, which is critical when treating expansive bodies of water to ensure that the chemical effectively reaches the target weeds. The conical spray pattern helps prevent excessive runoff, allowing the herbicide to settle more uniformly on the aquatic vegetation, thus increasing the overall effectiveness of the treatment.

While smaller droplet sizes, high viscosity adjustments, and dual spray patterns may have benefits in different contexts, they do not specifically focus on achieving the same level of coverage as the hollow cone design does in aquatic environments. Smaller droplets may be more susceptible to drift, high viscosity can complicate the flow and application method, and dual spray patterns might be useful in varied landscapes but are less specialized for maximizing coverage in aquatic weed control compared to the distinct advantages offered by the hollow cone design.