What term describes a spot application or treatment to just part of a bed or the plants in a bed?

The correct answer is "Apace application." This term specifically refers to the practice of targeting a particular spot or area within a larger planting bed rather than applying a treatment over the entire area. Spot applications are commonly used in pest management to minimize the use of pesticides and reduce the impact on non-target plants and organisms while effectively addressing localized issues, such as pests or diseases affecting only specific parts of the plants.

In contrast, a foliage treatment generally involves applying substances directly to the leaves of plants but doesn't specifically imply that the action is limited to just a part of a bed. General application would indicate coverage over an entire area rather than being targeted to a specific section. Full bed treatment, similarly, entails treating the entire bed rather than focusing on specific spots. Using the correct terminology helps in effectively communicating practices in pest management and ensures compliance with best practices in pesticide application.