Proper choice of grass and plant species for your site and your circumstances is the main key to a healthy landscape. Thusly keeping the lawn and landscape healthy is the best defense against pests such as weeds, insects or diseases.
If you decide to hire a lawn care company, you should be aware of the practices and products they are using on your grounds, why and when. After all, you are paying them AND you and your family will be running around on that lawn.

AIPM Tips for the Home Lawn & Landscape
• Develop pest-resistant varieties of plants, shrubs, and trees. Decisions ought to likewise be appropriate to soil and climate.
• Develop healthy plants. Focus on organic matter, watering, and different circumstances for healthy plants.
• Avoid injury to tree trunks (from mowers, weed whackers) that enable pests to acquire footholds; lay mulch at tree bases.
• To battle weeds, keep a satisfactorily prepared yard; hand dig weeds; spot-treat.
• Utilize specific pesticides. These will kill just your objective pest while leaving non-target species unharmed.