This means that the more persistent pesticides are in contact with nearly all life on Earth, as they can travel in the atmosphere and via the water of our rivers and oceans, causing pollution on a broad scale. They have even been discovered in the bodies of penguins from the Antarctic. Some degree of persistence, however, is an important practical and economic requirement. In the field, when an organism is subject to a pesticide, most will die. However, survivors may form the basis of a resistant population and lead to the species developing resistance.
Biological control means regulating pests via their natural enemies.
An example of this is the use of Encarsia formosia and Phytoseiulus persimilis to control white fly and spider mites in commercial glasshouses. Tomatoes are often protected with biological control in temperate climates Integrated control has the benefit of being both an economically and ecologically acceptable form of management for pest populations.