An animal which carries disease, attacks plants and animals and harms or kills them.
Any of various kinds of fauna that infest garden plants, or disturb a garden. Insect pests are of most concern in gardens, causing much damage to prized plants, also slugs and snails. Diseases differ from pests in being caused by micro-organisms such as fungi and bacteria, or minute internal fauna such as eelworms.
In the field of plant pathology, there exists a classification of creatures, often in the form of insects, mites, nematodes, and other similar beings, which have the capability of causing harm, injury, or ruin to plant constituents, such as plant parts and products.