A pesticide that is toxic to some plants or animals but not others is classified as what?

A pesticide that is toxic to some plants or animals but not others is classified as selective. This means that the pesticide is designed to target specific pests while minimizing damage to non-target species, including beneficial insects, plants, or animals. For example, certain herbicides may be effective against specific weeds while leaving desirable crops unharmed. This selectivity is crucial in horticulture and agriculture, as it helps manage pest populations while protecting the ecosystem and promoting biodiversity.

In contrast, non-selective pesticides affect a wide range of organisms indiscriminately and are often used to eliminate all vegetation in an area. Systemic pesticides are absorbed by plants and can affect pests that feed on them, while contact pesticides act on the surface where they are applied but do not offer the same level of selectivity. Understanding the classification of pesticides is essential for employing them responsibly and effectively in horticultural practices.