Which herbicide is described as nonpersistent?

A nonpersistent herbicide is defined by its ability to quickly degrade or become bound in the soil, making it less likely to linger in the environment for extended periods. This characteristic is particularly beneficial in integrated pest management because it reduces the risk of long-term ecological impact and minimizes harm to non-target organisms, such as beneficial insects or plants.

Nonpersistent herbicides are often formulated to act rapidly against unwanted vegetation, allowing for effective weed control without the concern of residual activity that could affect subsequent crops or ecosystems. The rapid breakdown can be due to chemical degradation, microbial action, or absorption into soil particles which ties up the active ingredients.

In contrast, options that describe a herbicide as long-lasting or effective only for a short time do not accurately capture the essence of nonpersistence. Additionally, a herbicide that is absorbed exclusively through foliage does not relate to its persistence in the environment; rather, it speaks to the method of uptake by the target plants. Thus, the characteristic of quick degradation or soil binding is the key feature that defines a nonpersistent herbicide.