Those products should work against chinch bugs. So since you are not seen good results I can't help but wonder whether or not chinch bugs are the problem or perhaps the only problem. Your lawn may be suffering from a disease called Take-All root rot. Products that provide satisfactory control of chinch bugs include those containing carbaryl or
any of the pyrethroid insecticides, such as bifenthrin (some Scotts? and Ortho? brands), cyfluthrin (Bayer brands), lambda-cyhalothrin (Spectracide? brands) or permethrin (e.g., Green Light? and Spectracide?). Resistance to the insecticide bifenthrin has been identified among southern chinch bugs in parts of Florida.
I suggest you take a sample (4" X 4" with roots) of the lawn to your County Extension Office along with a photo if possible for them to identify and then prescribe an appropriate remedy.
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