Benefit versus risk
Without pesticides an estimated 35% of the world's harvest would be lost, and there would be further damage to stored food products.
They ensure the quality of food we have come to expect, free from insect and mould damage, and give us a greater choice and variety with products available all year round. And increased yields help to maintain low prices.
Pesticides are also important for food hygiene; preventing rats, mice, flies and other insects from contaminating our food, and our homes.
However, there is a downside. Some people are concerned about the use of chemicals and pesticides. Others are worried about the residues they may leave in food, whether the levels they leave are safe or whether the residues may be building up problems for the future.
Another concern is the potential harm to wildlife and the environment. Many people attribute pesticide use to the decline in poppies, decreasing numbers of certain species of birds and the fall in our bee population.
Finally, the safety of people who work with pesticides and the general public who use the countryside must be considered.
Who controls pesticides?