Regular inspections will give you early warning of potential problems. Be sure you correctly identify a pest or problem since beneficial insects may be mistaken for pests. Indetifying the pest will help you decide if and when you need to apply treatment.
Accept that a few weeds or insects pests won’t noticeably harm a healthy lawn. Don’t be alramed at the first sign of a pest. It is not necessarily a threat to your lawn.
Attacking pest problems from several fronts is often more effective. For example, if chinch bugs are a problem, you can dethach the lawn, keeping it well watered, increase the mowing height, keep nitrogen fertilization to a minimum, and overseed with grass varieties that are resistant to chinch bugs. These combinations of tactics will make it difficult for the pests to survive. Pesticides may be used but only when inspection of the lawn reveals that there is a problem. Only use a treatment as a last resort. If pesticides are used, they should only be applied to the area of the lawn which is being affected by the pest. The cost of applying the treatment should reflect to some degree the size of the affected area.