What is the primary use of pesticides that are classified as "buffers"?

The classification of pesticides as "buffers" serves a specific purpose in ensuring the effectiveness and stability of pesticide formulations during application. Buffers are utilized primarily to maintain a stable pH in spray mixtures. This stability is crucial because the pH level can influence the solubility and availability of the active ingredients within the pesticide, ultimately affecting its efficacy against targeted pests.

By keeping the pH within an optimal range, buffers help to prevent the degradation of active ingredients that can occur at extreme pH levels, ensuring that the pesticide remains effective throughout the application process. Maintaining a stable pH also helps to minimize potential chemical reactions that could render the pesticide less potent or create harmful by-products.

The other options refer to different functionalities that do not align with the primary role of buffers. Increasing the volume of the pesticide, acting as a method of application, or enhancing visibility do not capture the essential function of buffers in pesticide formulations.