Any substance, preparation or organism prepared or used for controlling or destroying a pest. The majority of pesticides sought by the PRC in its monitoring are those used to control pests in agricultural crops, although non-agricultural products may be included where there is a specific reason for doing so, e.g. where there are implications in terms of possible intakes of residues. 'Pesticide' is a broad term, covering a range of products that are used to control pests. The slug pellets, ant powder, weed killers, and rat and mouse baits used in everyday life are all pesticides. Other types of pesticide include: (1) insect killers (insecticides); (2) mould and fungi killers (fungicides); (3) weed killers (herbicides); (4) slug pellets (molluscicides); (5) plant growth regulators; (6) bird and animal repellents, and (7) rat and mouse killers (rodenticides). Often people only think of pesticides as chemicals, but they include many different types of products. Some are natural, such as pyrethrum which is obtained from chrysanthemums, while others are synthetic versions of natural chemicals. A fuller definition of the word 'pesticide' can be found in the legislation that sets out the arrangements for the approval of pesticides