What is true about basal bark applications of herbicides?

Basal bark applications of herbicides are a specific method used to control woody plants, and understanding the characteristics of this method is crucial for effective vegetation management.

When considering the points about basal bark applications, the effectiveness on woody species up to 10 inches in diameter is a key aspect. This method is particularly beneficial for controlling smaller trees, making it a popular technique in right-of-way management.

Additionally, these herbicide applications can be made throughout the year. This is advantageous because it allows for flexibility in treatment timing, permitting treatment when conditions are suitable or when the target species are most susceptible.

The application technique itself involves applying herbicides to the lower portion of the trunk, typically the basal part, which effectively delivers the chemical directly to the plant's vascular system. Though the description states that they are applied on the upper 18 inches of the trunk, it's significant to note that the actual treatment zone is usually focused on the lower section of the tree trunk.

Given that all these statements accurately capture the characteristics and applications of basal bark treatments, the choice indicating that all of them are true is the most comprehensive answer. It encapsulates the scope and flexibility of this herbicide application method in managing woody species.