I know everybody’s lawn has received its last dose of fertilizer and pre-emergent. If you have not applied these to your lawn, you’d better hurry. Why am I typing this article you ask? Fungus, specifically, Brown Patch Fungus.
Last year was a banner year for Brown Patch fungus. Brown Patch will effect all types of grass but really likes St Augustine. The key to preventing Brown Patch (most other lawn fungus as well) is in the way we fertilize, water and mow. Avoid using water-soluble nitrogen (fast release) fertilizers, instead look for water-insoluble nitrogen (slow release or time release). During cool weather we should only water in the morning and never in the evening. Start bagging the lawn clippings at the first sign of brown patch.
Both all-natural and synthetic fungicides are available. One of the best is an all-natural called Atinovate and number two on the list is agricultural corn meal. On the synthetic side is Ferti-lome’s Liquid Systemic Fungicide and F-Stop. Trying to apply a preventive (like corn meal of F-Stop) can also work but you’re timing must be perfect.
Brown Patch: http://aggie-horticulture.tamu.edu/galveston/weekly_Q&A/t_5.htm