Hi SuzieQ - Here is an article about the dreaded Chinch Bug. Hope it helps
Chinch bugs very small bugs (usually 1/3 inch or less in length) that are red in appearance when young, and black with white wings along their backs when grown. These bugs are common to St. Augustine Grasses, and a lesser degree to Kentucky Bluegrass, Zoysia, and Bent grass. Chinch Bugs feed on grass blades by sucking-out the juices and drying out the grass. The most common signs of Chinch Bug infestation is the appearance of yellow colored patches that eventually turn brown and die. The easy way to check for Chinch bugs in your lawn is to place a bottomless container or coffee can a few inches into the ground over the edge of one of the infected spots and fill it with water. Eventually, if present, the Chinch bugs will float to the top.
Getting Rid of Them: The common insecticides used on Chinch Bugs are Diazinon and Dursban. Pyrethrin, insecticidal soaps, and Flortine (Chinch resistant) type St. Augustine grasses are also used. However, for most people, proper lawn maintenance is the best control for Chinch Bugs. This includes watering, aeration, dethatching, and mowing higher. Since Chinch bugs like to lay their eggs in layers of thatch, it is important that thatch levels are kept under control! Click here for a list of companies in your area who can help you control Chinch Bugs!
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