I have quite a bit of grass to cut. I have a Husqvarna riding mower and overall it's done very good for me. I service it, change oil, filters, sharpen blades. Now, for my grass. Recently I've noticed brown spots that show up a day or two after I cut it. Sort of like it's burnt. This week 3 showed up about 8-12 inches in diameter. I googled it and came up with a few things that may be causing it. 1#, Exhaust gasses/ burns from stopping or pausing. #2, fungus, mold. #3, gas leak, but I checked into that. Not a leak found. Apparently, one source claims grass builds up under the deck from moisture and creates a white fungus that looks like cotton. It later falls off and kills the grass. However I don't believe that. Another source claims dull blades. I ruled that out. My blades were sharpened correctly. This is the first time I've encountered this problem out of all these years. Hmmm.
Could it be red thread? It’s a form of fungus. I have a similar thing and the spots showed up after a few days of very hot, high humidity weather and several thunderstorms that dumped a lot of water followed by hot and humid weather again?
Could it be red thread? It’s a form of fungus. I have a similar thing and the spots showed up after a few days of very hot, high humidity weather and several thunderstorms that dumped a lot of water followed by hot and humid weather again?
My guess is a fungus at this time. There are a few fungi out there. Lately it's been very humid and hot, rains, sun comes out, rains, gets hot, cools down.
Rhizoctonia is a common grass fungus. Hot humid weather with rain is perfect breeding ground.
