What does basal application refer to in herbicide application?

Basal application refers specifically to the method of applying herbicides to the lower portion of a plant, typically at the bottom 12 inches of the stem and around the root collar. This technique is particularly effective for controlling woody plants and can enhance the absorption of the herbicide, as the lower parts of the plant can effectively uptake the chemical. In this method, the herbicide is often mixed with an oil or other carrier to improve adherence and penetration into the plant tissue.

This application method targets the parts of the plant that are closer to the ground, which often makes it easier for the herbicide to move into the plant's vascular system, especially for larger, established plants where penetration through the leaves might be less effective. By applying the chemical directly to the base, users can maximize its effectiveness while minimizing drift and impact on neighboring plants.