Pest control is often difficult to achieve even under optimum conditions.
Excessive rates may cause damage to the present or succeeding crops, harm to animals or result in environmental concerns. Application rates less than recommended likely will result in inadequate pest control, which leads to decreased crop yields. Excessive or inadequate application rates increase the cost of production because expensive chemicals are wasted. Thus, the right quantity of chemical and the recommended number of gallons per acre must be uniformly applied. In addition, some pesticides can cause damage if they drift outside the target area.