Iowa Right-of-Way Herbicide Category 6 Practice Exam 2026 - Free Herbicide Certification Practice Questions and Study Guide

Adjuvants play a crucial role in herbicide applications by enhancing the effectiveness and overall performance of the herbicides they are used with. They are formulated substances that can improve the way a herbicide interacts with the target plant, often by modifying its physical or chemical properties. For example, adjuvants may increase the surface tension of the herbicide solution, allowing for better spreading and coverage on plant surfaces, or facilitate penetration through the plant cuticle. They can also help improve the solubility and mobility of the herbicide within the plant, ensuring more efficient uptake and action against unwanted vegetation.

In essence, adjuvants are not herbicides themselves, nor do they replace herbicides or serve as primary ingredients; instead, they are supplemental agents that optimize the herbicide's performance in controlling weeds.