What is the main purpose of using a spray adjuvant?

The main purpose of using a spray adjuvant is to make pesticide applications more efficient. Adjuvants are substances added to pesticide formulations to enhance their performance and effectiveness. They can improve the spreading, adhesion, or penetration of the pesticide, allowing it to work better under varying environmental conditions or on different surfaces. By optimizing the way pesticides interact with the target pest or plant, adjuvants help ensure that the intended active ingredients are used more effectively, which can lead to better pest control and potentially reduce the overall quantity of pesticide needed.

The other options don't align with the primary function of spray adjuvants. Increasing the volume of pesticides used may not be desirable from an economic or environmental standpoint. Changing the chemical properties of pesticides is not a typical role of adjuvants; instead, they complement the existing formulations. Additionally, while proper training is essential for effective pesticide application, adjuvants do not replace the need for this training; they are tools that assist trained applicators in achieving the best results.