Lawns can withstand a certain population of these insects but begin to die rapidly once the numbers get out of hand. When treating insect problems with insecticides make sure you use the products at the right rate and at the right time for effective control. The insecticide must come into contact with the insect in order to kill the pest. Most insects feed on the roots of the grass plants so the chemical must be placed at or beneath the thatch layer. This means that you should water appropriately before and after applying the insecticide application so that the chemical is washed down to the area where it is needed.
Chinch bugs are shallow feeders and can generally be seen close to the soil surface.
Grubs are often deep in the soil and require both heavier application rates and more water to wash the insecticide down. Insectides are available as granular products in combination with fertilizers for safe and easy handling. The fertilizer will help to stimulate re-growth in the infected areas. For heavy populations, you should contact your local licensed lawn care company to spray the lawn. Crabgrass, prostrate knotweed and creeping charlie are three examples of especially problematic weeds in summer.