In granular herbicides, what materials are recommended as carriers for the active ingredient?

Granular herbicides utilize carriers to effectively deliver the active ingredient to the target area. The recommended carriers, such as clay or ground-up corncobs, provide specific advantages. Clay acts as an excellent moisture-retaining medium, which helps to maintain the integrity and effectiveness of the herbicide over time. Ground-up corncobs, being lightweight and highly porous, facilitate even distribution of the herbicide granules and enhance soil infiltration.

These carriers ensure that the herbicide adheres properly to the leaf surface or soil, allowing for optimal uptake by the target plants. Additionally, they assist in reducing dust during application, increasing safety and efficacy. In contrast, other materials mentioned, while they have their uses in landscaping or gardening, may not provide the necessary properties for effective herbicide delivery and can lead to uneven application or reduced activity of the herbicide.