3STTW Posted November 9, 2020 Share Posted November 9, 2020 Since the heavy rain in October when our lawn got partially waterlogged, we’ve got this horrible crusty fungus eating the couch grass. Anyone know what it is and how to get rid of it? Link to comment Share on other sites More sharing options...
cooked Posted November 10, 2020 Share Posted November 10, 2020 Looks similar to Fusarium nivale, snow mould. I don't believe that fungi actually eat grass. If the grass isn't growing well, this is just part of a problem you are having with the soil / available nutrients, do you fertilise? The traditional treatment would be a copper based fungicide, OR: just let it disappear. If it reappears next year you may want to take measures to alter the pH of your soil (easy, don't worry), OR: do nothing. Link to comment Share on other sites More sharing options...
3STTW Posted November 11, 2020 Author Share Posted November 11, 2020 Interesting, I agree that it’s not ‘eating’ the grass but it is covering the soil and preventing any new growth. I don’t fertilise at the moment but this sounds like the best solution - along with breaking up the fungus with a rake. Can you recommend a good couch fertiliser available in LoS? Link to comment Share on other sites More sharing options...
cooked Posted November 12, 2020 Share Posted November 12, 2020 17 hours ago, 3STTW said: Interesting, I agree that it’s not ‘eating’ the grass but it is covering the soil and preventing any new growth. I don’t fertilise at the moment but this sounds like the best solution - along with breaking up the fungus with a rake. Can you recommend a good couch fertiliser available in LoS? OK, scrape it up if you want to, but it won't improve growth. If you can't find a specific lawn fertiliser in Thaiwatsadu then you can try a rice fertiliser, but go easy on the dose, not more than 10% nitrogen /M2 and see how it goes aas you water regularly... Link to comment Share on other sites More sharing options...
3STTW Posted November 14, 2020 Author Share Posted November 14, 2020 I had a go and raked about 5sqm with pretty good results. It rips up the fungus and the sickly grass (like hay) and leaves the healthy green shoots behind. I haven’t watered it for a week so the fungus is dry and crispy which makes the job that much easier. I also noticed that where the worst patches are the topsoil has all but washed away so I’ll rake in some potting mixture tomorrow. The couch grass is pretty good at re-covering bare patches. Hopefully the potting compound and some worm castings will help it along. Link to comment Share on other sites More sharing options...
bankruatsteve Posted November 15, 2020 Share Posted November 15, 2020 12 hours ago, 3STTW said: I also noticed that where the worst patches are the topsoil has all but washed away If you have soil erosion, simply replacing won't help. You will need to either re-grade or put in rocks or whatever to stop the erosion. Link to comment Share on other sites More sharing options...
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