What defines a nonselective pesticide?

A nonselective pesticide is defined by its ability to affect a wide range of plants or animals, rather than targeting specific species. This broad-spectrum activity means that nonselective pesticides can kill or damage various types of plants, including both weeds and desirable vegetation, as well as certain animals in some cases.

This characteristic is significant for certain pest control situations where controlling a wide array of unwanted species is necessary. However, because of their broad toxicity, nonselective pesticides need to be used with caution, as they can harm beneficial plants and animals alongside the target species.

In contrast, the other options describe products with specific targets or effects. A product toxic to fruits would imply selectivity, while a pesticide toxic to a specific weed species would also be selective. A non-toxic product to all living organisms does not meet the criteria for a pesticide, which inherently involves toxicity to pests to fulfill its purpose.