How can I keep pests and diseases away from my lawn?
You may want to read some of my other answers and referenced sights. Here is a quick answer of just a few of the very many, natural and organic approaches. Remember, this is but a few. And remember, if you also use synthetic chemicals with these natural approaches, they tend to kill and put out-of-wack the natural, healthy systems of plant and soil life. Otherwise, the organic approaches will not be as effective because you are killing or altering natural, healthy processes by applying synthetic fertilizers or chemicals. Cornmeal fights all kinds of fungi. You will see some data if you click my name. Garlic tea (and sometimes you can mix in some pepper tea with a bit of ginger) will inhibit all kinds of bugs and diseases and fungi. Even skim milk diluted with water can be sprayed as an antifungal. Lots of plants and their extracts inhibit mosquitos and bugs. See some of my posts. Diatomaceous earth (d.e.) [food grade…that is important] not only will help handle fleas and roaches and