Integrated pest management, or IPM, is an ecological approach to controlling unwanted vegetation, plant diseases and pest populations by the use of preventive and non-chemical methods that minimize risks to human health and the environment. With IPM concepts in mind, the district uses preventive and non-chemical methods of control first. These control methods are recorded, monitored, repeated when necessary and evaluated to determine their degree of success. If the desired effect is not achieved, other methods are considered. When alternative methods have been employed, evaluated and determined to be unsuccessful, chemical controls may be used as a last resort. When chemical controls are used, the notification, posting and recordkeeping practices described below are implemented.