What characterizes a nonselective pesticide?

A nonselective pesticide is characterized by its ability to act against a wide range of pests rather than targeting only specific species. This broad-spectrum activity means that it can effectively control many different types of weeds, insects, or other unwanted organisms in a given area. Nonselective pesticides often affect not just the intended pests but can have consequences for beneficial organisms as well, due to their lack of specificity.

The other options describe characteristics not associated with nonselective pesticides. For instance, a pesticide that targets only specific pests is classified as selective and is designed to minimize harm to non-target species. A pesticide that is safe for all organisms would not be effective as a control measure since it would not achieve pest management goals if it does not affect the target pests. Lastly, while some nonselective pesticides may require multiple applications for full effectiveness, this is not a defining characteristic of nonselective pesticides themselves but rather a potential requirement based on the pest and environment.