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17 messages
11/07/2014 at 18:33


Five circles of brown grass, surrounded by darker course green grass, have appeared in my lawn .  They only emerged a couple of weeks ago.  The garden did flood twice between end of May and mid June - could this have anything to do with it?

No idea what it is or the cause - any suggestions and remedies greatly appreciated

Hope photo is OK.

11/07/2014 at 18:39

It looks as if a bitch or vixen has been peeing on your lawn - do you have a bitch or does one use your garden?


11/07/2014 at 18:42

Hi Jan

Bear with me, it could be fungal disease I am trying to get some info up for you so you can compare







11/07/2014 at 18:53

There are three cats nearby but none of them use the grass as a loo!

11/07/2014 at 19:01

Hi Jan

Iam having problems at the minute trying to get some info, but if you google

Brown patch Fungus and compare

Hope this helps

11/07/2014 at 19:10

I'm sure someone will recognise this JanBi. Hang around over the weekend and someone will turn up

11/07/2014 at 19:21

It still looks to me like a dog's or fox's  urine - the concentrated urine burns the grass but around the edges where the urine isn't so concentrated the nitrogen in the urine acts as a fertiliser making the grass grow darker and taller - your photographs are text book examples.

I think Buddyboy may be thinking of Fusariam patch lawn disease, which is now called Michrodochium nivale.   If that's what it is the brown patches will get bigger and bigger and eventually join up. It's most commonly seen in the winter, particularly after snow has been laying on the grass - not something that's happened recently.  Also it doesn't have the longer darker grass around the patches which are shown clearly in JanBi's photographs. 



11/07/2014 at 19:29

Hi Jan

Hopefully I have something this time and it does not matter what name it is treated the same



Home/Information Centre / Turf Pest & Disease Control / Brown patches in turf Brown patches in turf



  1. Do you see brown patches (75mm to 600mm in diameter) in your turf?
  2. Has your turf been soaked and very wet for a week or so?
  3. Is the weather cool: 7-15°C (45-60°F)?

If these conditions apply, then you might have a foliar fungus in your turf.

General description of foliar blights of turf

In the UK, foliar pathogens of turf are commonplace. This is because the weather is often wet and cool for extended periods of time. Foliar pathogens are those fungi that attack and kill the leaves of turf. In general, they do not kill the entire plant, but they do cause the turf to look poor. Foliar pathogens are found in all parts of the UK, and live in grass swards year round. Only when the weather is cool and wet are they capable of attacking the living grass leaves and killing them. The reason is that the fungi that cause these leaf blights must have long periods of time when the grass leaves are wet. There are many different fungi that can cause a foliar blight, but they all have similar requirements for their development. While a turfgrass pathologist can identify the particular fungus that is attacking grass, it is not necessary for the purpose of control. It may be of interest to know that some of the foliar blights have specific names, like Fusarium blight, dollar spot, Septoria spot, Curvularia blight, Drechslera blight, Helminthosporium blight and melting out. For the purpose of managing these diseases in fine turf, it is not necessary to determine exactly which leaf blight is causing brown patches in your turf.

Turfgrasses with disease resistance

All turfgrasses grown in the UK are attacked by foliar fungi, but some are more resistant than others. To learn which grasses are the most resistant, consult a professional agronomist or The Sports Turf Research Institute.

Cultural practices for controlling foliar blights

The best approach to preventing the development of brown patches in turf is proper turf care. In summary, the following suggestions should get you started:

  1. Mow your turf properly. Tall grass stays wet a long time each day, and this is ideal for disease development. If you have brown patches in your turf, try and mow the lawn when it is dry, not wet. This will reduce the spread of disease.
  2. Fertilise your turf properly. Brown patches caused by fungi will vary in terms of how they respond to fertiliser: some attack when fertiliser is low, and others when it is too high. The best recommendation is to fertilise your turf just enough to support good growth.
  3. Water your turf and make sure that it drains well. Fungi need water to attack your turf. The longer your turf is wet, the more brown patches will develop. Soil that does not drain well will stay wet longer and cause your turf to grow poorly. If your soil puddles for hours after a rainfall, it may be compacted.

Can you use fungicides to eliminate brown patches?

Yes, fungicides can be used to control the foliar diseases that cause brown patches. Fungicides are toxins, and should only be used when necessary. Make sure that the brown patches in your turf are indeed caused by a disease. It is recommended that you seek qualified professional advice before using fungicides.

We also recommend that you obtain advice about chemical and non chemical products directly from the manufacturers.







11/07/2014 at 19:54


12/07/2014 at 08:49

Its a classic case of cat/dog pee as Dove pointed out. Unless someone has been spot weeding.

12/07/2014 at 09:12

Just popped out to take a photo of one of our lawn patches.  We do have a bitch and your pic looks very similar. Perhaps you will have to keep watch to see what visits your garden.

12/07/2014 at 09:24're very lucky that it's a female dog...I've got a male and I've lost several nice plants because of his cock-a-leg tendencies...

..of course I still love

12/07/2014 at 09:44

Bitch or vixen I think. The dead patch surrounded by bright green is a giveaway.

12/07/2014 at 10:22

Hi Jan

First of all I would like to say that i do not discount animal urine, and after reading all of your post this is how I said Brown Patch Fungi, if you read my post about this under,, Indentification


1/ Do you see brown patches minimum 75mm,,,,, The answer is yes

2/ Has your lawn been soaked or wet for a week or so, you already stated it was flooded and under water for a certain amount of time,,,,The answer is yes

3/ Is the weather cool this means when it was wet, as this was under water at the time the temperatures of 45/60 deg would be plausible and probably again the answer is yes

Here is another 2 Pics of brown patch fungi with darkened areas around it

 As you can see there is darkened areas round the spots, what I have given you was merely a suggestion and I personally never come to any conclusion until all the facts are met

Cheers Jan I hope you get to the bottom of this


13/07/2014 at 17:25

Thanks everyone for your helpful answers.  I looked at them this morning and the brown patches are actually shrinking, so I think it must be caused by animals.  We did see a fox about a year ago, but nothing since.  Unfortunately you cannot watch the garden 24/7 to find out what is out there!

Again, many thanks - I knew I would get some sensible replies from you guys.


13/07/2014 at 17:32

If you notice a new one where the grass is beginning to turn brown, empty a bucket of water over it to dilute the pee - it should help a bit. 

13/07/2014 at 17:56

Many thanks for the tip - will try to be more vigilant!

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