What is the optimal practice for achieving thorough coverage on ornamentals when applying fungicides or insecticides?

Achieving thorough coverage on ornamentals when applying fungicides or insecticides is essential for effective pest or disease management. The optimal practice is to apply the products to the point of runoff. This means that the product is applied until it begins to run off the leaves or the surface being treated, ensuring that the entire area has been adequately covered.

When the product reaches the point of runoff, it signifies that there is sufficient coverage on the plant surfaces, including both the upper and lower leaf surfaces. This is crucial because many pests or diseases can reside on the undersides of leaves or in crevices, making it necessary to ensure that these areas are reached by the applied material.

The other options do relate to the application process but do not address the issue of coverage as thoroughly. The target zone refers to the specific area where the treatment is intended to be effective, while application rate pertains to the concentration of the product used. Coverage technique addresses methods of application but does not specifically capture the idea of optimal saturation and runoff that guarantees comprehensive coverage. Therefore, applying to the point of runoff is essential in maximizing the efficacy of the treatment.