There is currently a state-wide issue with Sod Webworms in Florida. This is due to the amount of rain we have received this summer, as sod webworms live in wet conditions.
Here is some information about Tropical Sod Webworms:
Sod webworms are the larval stage of the moth. Sod webworms live in the thatch layer, spinning a light webbing and feeds on the undersides of grass blades. These pests usually feed at night and can cause extensive damage in a short amount of time, causing brown patches in your lawn. To determine whether or not it is sod webworms harming your lawn, you can dig into the thatch and search for their silk-lined tunnels. Sod Webworms can easily be confused with other pests, so be sure to consult a pest control professional to control them.
Up-Star Gold is an effective insecticide for sod webworm (and chinch bug) eradication.
Available for $59.99 in 1 gallon bottles
Eagle 20EW is the Fungicide you want to use to bring your lawn back to good health.
Available for $49.99 in 1 pint bottles
landscape supply co