Which type of herbicide does not translocate to other tissues or out of leaves?

Contact herbicides are designed to act on the parts of the plant they directly touch. When applied, they effectively kill the targeted plant tissue but do not move through the plant’s vascular system to other tissues or parts of the plant. This localized action is essential in various pest management strategies, as it allows for precise targeting of specific plants without affecting others nearby, assuming they are not directly contacted by the herbicide.

In contrast, systemic herbicides are formulated to be absorbed by the plant and translocated throughout its tissues, affecting various parts of the plant even if only a part of it is initially treated. Selective herbicides target specific types of plants while sparing others, often utilizing translocation to ensure efficacy. Broad-spectrum herbicides can kill a wide variety of plants but also typically rely on some level of translocation to ensure that the active ingredient reaches all desired plant tissues for maximum effectiveness.