Organic St. Augustine lawn with chinch bug
We have used only organic methods for almost three years. We have about 5,000 square feet of new lawn (since January). We fertilize it with alfalfa pellets and soybean meal and it has grown nicely and is very green. In April we sprayed it with beneficial nematodes to try to prevent chinch bug. We are the only ones that mow and edge our lawn so as not to bring in disease and weeds. It is mowed at 4 inches. Recently, with the drought stress here in FL, we have seen irregular patches of yellow and brown reminiscent of chinch bug. I really don't want to spray pesticides as we have spent a long time developing natural flora. What do I do?