• What's the cutting routine?

    That looks far too long in some pics, so I'd suggest that it's a combination of cutting it too short with irregular cuts, and the dry season we've had.

    I've raised the height of cuts this summer, and still seeing dry lawns and burnt ends.

  • PRO

    Forget the grass Rob, how the heck do you keep your hands so clean? :-)

  • PRO Supplier

     Don't think its Rust - you should be able to run your finger & thumb and wipe off yellow powder. The lawn looks in good nick so unlikely to be a nutrient deficiency, however clay + rain can create a chemical process that means excess nitrogen is lost as a gas.....

    Fungal diseases are hard to pin down from a photo....but paleness starting in the centre of the leaf blade and darker patches surrounding the yellowing - I would look at Microdochium Patch (fusarium). Check for black root rot in which case it could be Anthracnose...

  • PRO

    Thanks for the replies.

    The lawn has little or no traffic over it, no kids ect. The only traffic is the lawn mower

    Paul I don't believe it to be anything with the cutting, the client is very keen on the lawn and does a great job. 

    Graeme the only way my hands get dirty is if I fall over ;)

    Louise I'm very familiar with fusarium - and it's not that.  I had settled on rust as it's a rye grass lawn.

    My experience of Anthracnose is it usually appears later in the year (Late august or September) and favours Poa annua. 

    I will have to get to the lawn again to see if I can rub the "rust" off.

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    I had hope for another couple of expert replies?

  • PRO

    It certainly baffles me this one, wouldn't think it was rust but hard to say one way or another without personally seeing the grass.  If this was my own lawn, I would first check my mower blades are sharp and secondly test a small area by spraying something containing as an example 14% Nitrogen, 7% Phosphate & 7% Potassium or even just a liquid Ferrous Sulphate to see if this helps perk it up.  Ideally a soil sample would be useful.

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      Ollie from Agrigem was kind enough to give me a ring today about it, he is sending over a soil test kit so hopefully this will get the ball rolling in the right direction. I will of course keep you guys updated...

      • PRO

        Any update Robbie or did Ollie fail to deliver (sorry private joke between Ollie and myself) :-)

        • PRO

          Agrigem did some soil tests and they proved to be inconclusive as the results were fine. I had shared the results/pictures with a number of different experts and again drew a blank. Nothing stood out. 

          I don't believe it to be rust as it doesn't rub off... 

          I believe the main problem to be a drainage issue, the lawn is on a heavy and mostly clay soil and outside the property on the other side of the road is a quarry - which results in lots of run off water. 

          To be fair to Ollie I don't think he could have done any more than he did for me. 

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    I will get some photos at teh weekend - I have about 2 acres of this in one of my fields - Its been identified as a mix of Magnesium deficiency and calcium deficiency - caused by high soil PH - again caused by large amounts of Nitrogen been applied in the past (previous land owner) and the soil is very damp due to being near a spring - thus low oxygen, causing acidity in the soil due to aerobic decomposition of organic matter causing carbolic acids to build up.
    The soil is quite heavy aluminium based clay.

    Solution was improve drainage and apply 2/tonnes/acre so about 25/g/m of magnesium limestone to increase the PH and also the available nutrients.
    Took about 4 weeks to improve but has been fine since.

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