The first thing is proper identification. Red Thread and Pink Patch generally occur in spring and fall, not winter. Red thread has antler like projections called sclerotia that grow from the blades, so it's easy to tell if you have that. I suspect you have pink snow mold or Fusarium patch. What was this winterizing treatment you used to prevent snow mold? Did you mow your grass lower than usual once it was dormant, or did you leave it long? Most of the winter molds only affect the blades, leaving the crowns intact and will clear up once growth resumes in spring.

Red thread is a fungal infection. It's dominant during cooler seasons and damper ones, but that doesn't mean it can't run rampant in summer! While recovery tends to happen in fall--it being on the drier side and grass growth increasing again from summer--if the infection is spreading faster than the grass can overgrow it, it'll look terrible. >>i would hope it's not caused by a lack of nitrogen. It isn't, per se, although a lack of nitrogen will tend to slow lawn growth and make the red thread much more obvious. >>I even have an irrigation system and they do not. How often are you using it? With red thread, less water is better (but it's difficult to cut back immediately). Optimally, lawns do best with 1 inch of water delivered all at once, once per week. If you're on daily watering, cut back instantly to once every other day. In another ten days, go to every third day. And so on until season's end. Next year, pick up at every third day if it doesn't rain, and slowly pull that back. Eventually you'll hit seven days. Can a lawn look good at that watering level? Mine's been watered four times this season. The rest of it, nature has done for me--sometimes with 14 days or more between rainfalls. The grass does fine, if a bit wilty by day 15 or so. >>Other DIY neighbors using a program like Scott's have much nicer looking and greener lawns than mine. This is because...drumroll please...lawn services stink. On average, there are a few exceptions, but most of the big name lawn services don't deliver very much for their cost. For a much better lawn, fire them. Then go to your local big box store and pick up either Scott's fertilizer (which I do not like), Vigoro (works for me), or Milorganite (the best of the bunch). Get enough to feed your lawn twice. Feed immediately at half the bag rate. Feed again in a month at full bag rate. If you used Milorganite or your lawn didn't stop growing until November 10th or so, feed one last time with Vigoro or--if you must--Scott's at bag rate. Milorganite won't work very well at this point, it's getting too cold and Milo requires bacterial action.

I agree 100% with the comment above (i.e., San Antonio)! I am hoping to help anyone who has had an on-going problem with red thread. Believe me that I have tried it all. I struggled with an outbreak for over ten years on an acre of land. There is no way to explain how this took over my life at times considering the amount of lawn I had and the length of time I struggled with it. I have spent untold thousands of dollars. I even became friends with a research scientist for a company that produced a natural microbe product, in addition to the president of a company that produced a nitrogen product with beneficial microbes. I did a lot of legwork and made many professional connections over the years. While some of the more natural remedies might be helpful (rather than using commercial fungicides which sterilize the soil and seem to perpetuate disease because the population of beneficial microbes is disturbed), I eventually felt that only correcting the true crux of the problem would lead to a solution. In other words, to try and approach red thread with the mindset that you have to overcome, annihilate, kill ... will never work, or at least in my experience. You can try to do everything you want to kill it, but the only way to get to a true solution is to boost the health of everything involved (i.e., soil, plant, microbes, etc.)! It is no different than the immune system of a human being! You have to boost the entire system with nutrients and not just one or two or three. And shouldn't minerals and beneficial microbe diversity be the first line of defense for plant life, just as it is for us? For us, 80% +/- of our immune system is in our guts, and if we don't have the correct amount of good bacteria and the proper bacterial diversity, disease takes over and autoimmune diseases develop. I used this knowledge and applied it to my lawn. Yes, it is true that lawns low on nutrients will be more prone to red thread and other diseases. We all know that the general solution is said to be nitrogen. Well, I tried the highest nitrogen I could get for a couple of years. Still had red thread. I have spoken with university extensions who said that when it developed, one application of nitrogen should eliminate it and they had witnessed this. Still waiting on that. So, it may be true for some, but not for me. I think this could be because commercial nitrogen itself can possibly compromise the soil microbiome? That may be up for debate? Since I knew the soil itself was the problem, I started researching the basis of all life ... minerals. I came upon an article on the Net entitled, "Turfgrass Diseases: The Relationship of Potassium." Now I had already gotten a soil analysis which said my potassium was high. But I couldn't help feeling that perhaps this was a potassium problem? Perhaps there was potassium in the soil, but to get it into the plant is a different matter altogether? Could it be that getting it into the cells of the plant was the issue? Soil compaction problem? Root issues? So many possibilities, who could say. But again, it's the same for humans. You can take all the vitamins and minerals you want, but if your gut isn't able to assimilate them, you are going to develop a deficiency. Keep in mind I had tried milk, corn meal (both corn gluten meal and regular), natural fungicides with clove or beneficial microbes (which sometimes did help short-term, but the red thread always came back), chicken manure, compost tea (which I eventually realized could make the problem worse because tea has to be brewed and immediately applied or it may end up feeding the bad bacteria, or so I was told and seemed to experience myself), etc. Name something and I have tried it. In any event, I decided to take a shot and get some liquid kelp on the off-chance my soil had a compaction issue (which I knew it did) and had trouble getting potassium into the plant itself -- and would probably provide overall anything and everything I was missing ... like covering all the possible bases because kelp does so much. More than I could explain in a post. Well, here it is almost nearly November when I normally have a huge outbreak that takes out at least 1/3 of my acre -- and no red thread. In fact, I had no red thread from the time I first applied kelp throughout the rest of the summer. Any further nitrogen? No. Any other natural fungicides? No. I admit I did apply a bit of beneficial microbes one time made by Morgan Composting, Inc. (it is called Plant Protector and it has a picture of a cow on the container) which is an excellent product in itself. But the kelp I applied is made by Fertrell's. I did also apply granular chicken manure earlier in the season, but it never seemed to eliminate the problem permanently and it can also lead to a build-up of calcium in the soil if over-used for too long or too many years (so use in moderation within the realm of a rotational program)? Don't know if that's true, but just what I heard? I loved the chicken manure product made by Groganic and it helped tremendously, but let's face it, if your soil isn't right, nothing will help permanently for the long haul or lead to a permanent solution. The kelp is cost efficient and my lawn looks fantastically green, even approaching November. I do believe this is the end of my problem. Synopsis: if you want to get rid of red thread, at least try liquid kelp. If you want to do all you can to make your lawn look like a golf course, get kelp, granular chicken manure, beneficial microbes in the form of liquid like the one by Morgan, maybe a little bit of corn meal thrown in (some say corn gluten meal is better, some say regular is better ... it's still up in the air to me which one helps to grow the beneficial fungus more efficiently) ... Rotate these for a little while and I am confident you will be on your way to a permanent solution. I hope this helps!

It's possible. Can you bring the camera up to 3 inches away? Take the picture in the shade or on a cloudy day with no flash. What is your watering regimen? How often and for how long do you water? Or how often have you been getting rain?