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Is it blight ??

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  • #1

    Is it blight ??




    Sent from my iPhone using Grow Your Own Forum
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  • #2
    Dunno but I have exactly the same, the collective wisdom on here is that it is a magnesium deficiency and to spray with Epsom salts. If you look in the vegging out section you will see my thread "Please tell me this is not blight" (only started yesterday)
    photo album of my garden in my profile http://www.growfruitandveg.co.uk/gra...my+garden.html

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    • #3
      That's not blight and at a guess, I'd agree with Bill, in that it's a nutrient problem.

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      • #4
        Thank goodness for that cheers guys


        Sent from my iPhone using Grow Your Own Forum

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        • #5
          Sorry to disagree, but I don't think this is magnesium deficiency. I get magnesium deficiency every year in my house grown tomato plants, which I grow in ridiculously small pots for just a couple of trusses of fruit per plant. This is what the lower leaves of my tomatoes look like and this is DEFINITELY magnesium deficiency:

          There is a purple tinge to the spotting, and the texture of the leaf is completely normal, not dried looking. There are no sharp edges to the darker areas, they blur into the green. Eventually the leaves turn yellowish-purplish brown and die, but the ones at the top of the plant are still healthy green.

          I think the spots on your potato leaves are probably brown leaf spot, or possibly early blight:
          Brown leaf spot in potatoes: Plan for this early blight look-alike in 2013 | MSU Extension
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          Last edited by Penellype; 10-06-2014, 03:04 PM.
          A life is like a garden. Perfect moments can be had, but not preserved, except in memory. LLAP. - Leonard Nimoy

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          • #6
            Capsid bug?
            Potty by name Potty by nature.

            By appointment of VeggieChicken Member of the Nutters club.


            We hang petty thieves and appoint great ones to public office.

            Aesop 620BC-560BC

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            • #7
              Originally posted by Penellype View Post
              Sorry to disagree, but I don't think this is magnesium deficiency. I get magnesium deficiency every year in my house grown tomato plants, which I grow in ridiculously small pots for just a couple of trusses of fruit per plant. This is what the lower leaves of my tomatoes look like and this is DEFINITELY magnesium deficiency:
              [ATTACH=CONFIG]46149[/ATTACH]
              There is a purple tinge to the spotting, and the texture of the leaf is completely normal, not dried looking. There are no sharp edges to the darker areas, they blur into the green. Eventually the leaves turn yellowish-purplish brown and die, but the ones at the top of the plant are still healthy green.

              I think the spots on your potato leaves are probably brown leaf spot, or possibly early blight:
              Brown leaf spot in potatoes: Plan for this early blight look-alike in 2013 | MSU Extension
              Oh Penellype, just when I thought I was out you pulled me back in, I am sadly leaning towards your diagnosis (Brown spot) because it has travelled from plant to plant, a deficiency wouldn't do that. For all that it matters Brown spot seems as bad as early blight!!! All I can hope for now is that it doesn't get my tomatoes.

              Dejected of Devon.
              photo album of my garden in my profile http://www.growfruitandveg.co.uk/gra...my+garden.html

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              • #8
                Originally posted by Bill HH View Post
                Oh Penellype, just when I thought I was out you pulled me back in, I am sadly leaning towards your diagnosis (Brown spot) because it has travelled from plant to plant, a deficiency wouldn't do that. For all that it matters Brown spot seems as bad as early blight!!! All I can hope for now is that it doesn't get my tomatoes.

                Dejected of Devon.
                Looking at the blightwatch site Fight Against Blight - Blight Incidents | Potato Council there don't seem to be any reported cases in Devon (although there is a possible one scarily near me in York). I think you would be unlucky if it was blight. Unfortunately the wet weather combined with warm temperatures is exactly the conditions that blight likes. I think we are going to get some respite from this wet weatehr shortly as high pressure seems likely to move in, which should hopefully dry up the atmosphere a bit. Lets hope it is not too late.
                A life is like a garden. Perfect moments can be had, but not preserved, except in memory. LLAP. - Leonard Nimoy

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                • #9
                  Originally posted by Penellype View Post
                  Looking at the blightwatch site Fight Against Blight - Blight Incidents | Potato Council there don't seem to be any reported cases in Devon (although there is a possible one scarily near me in York). I think you would be unlucky if it was blight. Unfortunately the wet weather combined with warm temperatures is exactly the conditions that blight likes. I think we are going to get some respite from this wet weatehr shortly as high pressure seems likely to move in, which should hopefully dry up the atmosphere a bit. Lets hope it is not too late.
                  My trouble is that I had blight last year and it wiped the lot out, so my patch is probably riddled with it, even though they are in new containers with new compost and I washed the yard down + disinfectant. This is definitely different to the blight I had last year. That was classic big blotches, now its tiny spots.

                  Oh well time will tell, at least I have 5 containers of sarpo mira to go at later.
                  photo album of my garden in my profile http://www.growfruitandveg.co.uk/gra...my+garden.html

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                  • #10
                    Bill, blight only survives on living plant material so unless you have some affected potatoes still in the soil/ground (which obviously you won't if you're using containers), it shouldn't carry over. Personally I've never understood how potatoes in the ground could carry it over either as, if they were infected with blight, they'd be mush months ago
                    Last edited by Shadylane; 10-06-2014, 10:18 PM.

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                    • #11
                      Originally posted by Penellype View Post
                      Looking at the blightwatch site Fight Against Blight - Blight Incidents | Potato Council there don't seem to be any reported cases in Devon (although there is a possible one scarily near me in York). I think you would be unlucky if it was blight.
                      The web site only lists commercial growers that have had blight. I know because I called them a few years ago when I had blight for the first time to complain that I had looked and there was nothing near me.
                      That's when I was told it was because there are no commercial growers in London.
                      But if you register with your post code you'll get a text telling you when your smith periods are so you can keep a close eye on things.

                      I had 16 happy blight free years here. Those were the days.

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