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South Florida Lawn Help

Old 12-29-2019, 02:47 PM
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Default South Florida Lawn Help

I am having some issues with my swale in Pompano Beach. It started as one small brown spot and now has spread to be the size of half of the swale. I have treated a couple of times with bifen thinking it was bugs, but it does not seem to have helped. Any suggestions?

Thank you




Old 12-29-2019, 03:55 PM
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Soil test will likely tell you what you need.
Old 12-29-2019, 04:30 PM
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more than likely brown patch you need to treat with a fungicide

Old 12-30-2019, 05:58 AM
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Thanks guys.
Old 12-30-2019, 06:09 AM
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Looks like fungus or other disease to me. Local extension agent should be able to dial in with some close up pictures.

Wouldn't suspect it to soil heath related given that you have some healthy stands in close proximity.
Old 12-30-2019, 06:43 AM
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I would recommend searching online for "The Lawn Care Nut". His youtube channel is https://www.youtube.com/user/LawnCareMidwest . He lives just north of Sarasota now, but does videos on Northern and Southern grass lawns. I agree with Insider, that this is probably brown patch disease, but I am far from an expert.
Old 12-30-2019, 06:58 AM
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Might be cinch bugs.
Old 12-30-2019, 07:41 PM
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How long between the pictures? That looks like chinch bugs and there are types that are resistant to bifen. Try some thing like this -


Old 12-30-2019, 09:34 PM
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Pick a warm sunny day at about noon and get down on your hands and knees at the perimeter of the damage. Look closely at the green grass at the edge and see if there are any small black specks moving on the blades. If so, those are cinch bugs. More than one per square yard is a problem. If you see them, don't bother buying anything to kill them. The only stuff that works is used only by the lawn service companies. The rest is outdated junk.

p.s. At first, I tried the stuff in the post above as well as some others. None worked at all. After Massey sprayed the lawn, the bugs were virtually gone one day later. Two days after and I could not find any.

Last edited by GaryDoug; 12-30-2019 at 09:42 PM.
Old 12-30-2019, 09:44 PM
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Fungus, insects or grubs.
Old 12-30-2019, 09:51 PM
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Treat it with a fungicide and an insecticide at the same time (they look very similar). No fertilizer until the grass starts growing back.....it feeds the fungus.

Be sure to treat your whole lawn to prevent spreading!!
Old 12-31-2019, 03:07 AM
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Originally Posted by jrolin1 View Post
Soil test will likely tell you what you need.

Yeah no soil test gonna tell you anything there. That some fungi.

Better yet stick a shovel down 10 inches and push the soil over to look at a xcross section. See more than a few of those white grubs I would treat it for that. Those things will eat the roots out and leave patches like shown in your pics.
Old 12-31-2019, 04:26 AM
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Headway G fungicide. Or split it up and get Propriconizole and Heritage G. Just saved my lawn with the latter. Brown patch started showing up about a month ago. Cool evenings and lots of water


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Old 12-31-2019, 04:37 AM
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That’s Cinch bugs. Better spray now or it only gets worse. They are spread by cutting the grass and can destroy it all with time.
Old 12-31-2019, 04:54 AM
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Do something even if it's wrong.
Old 12-31-2019, 05:04 AM
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Cinch bugs. Hurry up, get a service.
Old 12-31-2019, 06:12 AM
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More than likely it's brown patch as stated above. Once you have it you will always have it. I get it every year and it spreads. Once it's in the soil it's there and becomes active with less sunlight, higher humidity and night temps that don't drop below 68.

Best results are obtained by using different fungicides (daconil is still the best but I think it's illegal) proactively.

You will notice the active areas have a lighter shade of yellow then turn brown. Good news is it won't kill your lawn when treated. IMO, hire a good lawn chemical company as they buy the chemicals in quantity. Stay away from your large companies and try to find a knowledgeable, licensed and certified company that understands the problem and will treat it proactively every year.

I keep a list of problems I experience each time of the year so I can have them addressed proactively.
Old 12-31-2019, 07:50 AM
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Originally Posted by GaryDoug View Post
Pick a warm sunny day at about noon and get down on your hands and knees at the perimeter of the damage. Look closely at the green grass at the edge and see if there are any small black specks moving on the blades. If so, those are cinch bugs. More than one per square yard is a problem. If you see them, don't bother buying anything to kill them. The only stuff that works is used only by the lawn service companies. The rest is outdated junk.

p.s. At first, I tried the stuff in the post above as well as some others. None worked at all. After Massey sprayed the lawn, the bugs were virtually gone one day later. Two days after and I could not find any.
The threshold is 25-30 per square foot. The other stuff is not out dated junk. Chinch bugs are showing resistance to organophosphate and carbamates, but the stuff I posted above is a pyrethroid insecticide and should do it if used properly. Plus, it's $13 at lowes or home depot and can be done today. Do a float test and see how many you have, then spray, and then do another float test a day or so later. Anybody who pays attention to what they're doing can avoid having to use a chemical service. Make sure you switch up what you're using so you don't end up with chemical resistant insects.
Old 12-31-2019, 09:43 AM
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Originally Posted by MovingZen View Post
The threshold is 25-30 per square foot. The other stuff is not out dated junk. Chinch bugs are showing resistance to organophosphate and carbamates, but the stuff I posted above is a pyrethroid insecticide and should do it if used properly. Plus, it's $13 at lowes or home depot and can be done today. Do a float test and see how many you have, then spray, and then do another float test a day or so later. Anybody who pays attention to what they're doing can avoid having to use a chemical service. Make sure you switch up what you're using so you don't end up with chemical resistant insects.

Float test............. curious as to what that is?
Old 12-31-2019, 09:58 AM
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Originally Posted by MovingZen View Post
The threshold is 25-30 per square foot. The other stuff is not out dated junk. Chinch bugs are showing resistance to organophosphate and carbamates, but the stuff I posted above is a pyrethroid insecticide and should do it if used properly. Plus, it's $13 at lowes or home depot and can be done today. Do a float test and see how many you have, then spray, and then do another float test a day or so later. Anybody who pays attention to what they're doing can avoid having to use a chemical service. Make sure you switch up what you're using so you don't end up with chemical resistant insects.
you have to rotate chemistries properly though or you will have issues

you make 3 applications of the same chemistry before you switch to a different chemistry

you need to time the applications properly with the life span of the targeted pest as well (the label on the better products helps with that)


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