Which type of pesticide application involves injecting directly into the plant?

The type of pesticide application that involves injecting directly into the plant is indeed injection. This method allows for the precise delivery of pesticides directly to the target tissues of the plant, which can be beneficial for controlling pests that live inside plant tissues or for treating diseases that affect the plant's vascular system.

Injection minimizes product loss and reduces the potential for off-target effects, as it ensures that the pesticide is delivered exactly where it is needed. This method is particularly useful for treating trees and other large plants where surface applications might not penetrate effectively.

In contrast, band applications involve applying pesticide in a band along the row of plants, which may not reach internal pests. Spray applications cover a larger area and may lead to drift or runoff, while directed spraying targets specific areas but still relies on surface application techniques.