What is the selectivity classification of imazapyr?

Imazapyr is classified as a non-selective herbicide. This means that it is not limited to specific types of plants and will affect a wide range of vegetation, including both broadleaf and grassy species. As a non-selective herbicide, imazapyr is typically used in situations where control of various unwanted plants is desired, such as in industrial sites or areas prepared for new plantings.

The non-selective nature of imazapyr is important for applicators to understand, as it implies that the herbicide can and will harm desirable plants if they are exposed. Therefore, caution must be exercised during application to avoid unintended damage to plants that are meant to be preserved.

In contrast, selective herbicides target certain types of plants while leaving others unharmed, which doesn't apply to imazapyr. The other classifications—translocated and contact—refer to how the herbicides act within the plant. A translocated herbicide moves within the plant to kill it effectively, while a contact herbicide only works on the part of the plant it touches. Imazapyr, while having translocating properties in practical use, is primarily recognized for its broad-range effect on all plant species, reinforcing its classification as non-selective