A various obvious and important type of control are chemical controls , the use of insecticides or miticides to control pest arthropods. There are a great many different types of chemicals used for control of insects. Some are derived from plants, such as pyrethrins extracted from certain chrysanthemum daisies and neem seed oils. Most insecticides are synthetically produced and have a very wide range of uses and effects. One of the greatest advantages of insecticides is that their effects are usually rapid, allowing immediate control of a pest problem that was not managed by other methods.
Insecticides are often relatively inexpensive and easy to use.
For example some of the ways that insecticides can be applied are as direct sprays or dusts, systemic treatments applied to soil that are picked up by roots and moved throughout a plant, or foggers. Some insecticides may affect many different types of insects and are known as broad spectrum insecticides . Others affect only a few kinds of closely related insects and are considered selective insecticides . As with other types of pesticides, there can be certain hazards associated with their use. However, used properly and in strict accordance with label directions potential problems can be prevented.