Allotments 4 All

Produce => Edible Plants => Topic started by: Ruth Rocket on September 02, 2011, 22:35:00

Title: Potato blight??????
Post by: Ruth Rocket on September 02, 2011, 22:35:00
Hi Everyone,
I am hoping for some advice, I posted this on the Newbie thread a while back this evening (probably only half an hour ago!), but as i am worrying for a solution I am posting it here too.  Sorry if this is over-kill but I am working away for 4 days this week and if there is any chance of saving my potatoes I will have to do it tomorrow!
I dug up one plant today and the pots are awesome (desiree, we just made Bombay Potatoes with them!)  They were still flowering.
Thanks in advance,
Ruth xxxxx


Hi Everyone!
I am a newbie, both to this forum and allotmenting  :)  I have searched around this forum for a few nights and the knowledge and advice is awesome! 
We got our allotment on June 17th 2011 after waiting for 3 years and it looked like this:
(http://img.photobucket.com/albums/v606/hungrytoad/allot/IMG_2209.jpg)
currently it looks like this:
(http://img.photobucket.com/albums/v606/hungrytoad/allot/Unnamed3.jpg)
Which I was very pleased with until yesterday! ...... apart from all the seedlings being eaten by something, i would say birds but there has been a four legged animal walking all over the beds, which i am sure is a fox (i have seen him spraying on all the plots when he thinks no one is around!)   .....  surely they don't eat veg?
The broad beans seem to have some sort or blight?  Lots of rusty spots and virtually dead plants :(
But the worst thing yesterday was discovering the tomato plants I was given, looked extremely manky, after googling it seemed they had blight, so i dug them up and binned them.  Realising I had planted them next to potatoes I went back today to check the potatoes and they looked like this:
(http://img.photobucket.com/albums/v606/hungrytoad/allot/Unnamed2.jpg)
(http://img.photobucket.com/albums/v606/hungrytoad/allot/Unnamed1.jpg)

Does anyone know if this is potato blight?  If so what should I do?  Should I also post this elsewhere on the forum as I would love some advice?  I am sure I will keep plodding on even if it is blight! 

Sorry to be the bringer of bad news when saying hello!!!!!
Big hugs and snogs!
Ruth xx
Title: Re: Potato blight??????
Post by: caroline7758 on September 02, 2011, 22:41:46
You'll get an answer soon! ;)
Title: Re: Potato blight??????
Post by: George the Pigman on September 02, 2011, 22:53:53
Hi Ruth
brown/red spots on broad beans are very common. It's a fungal disease that attacks them in warm humid conditions. That's why it's best to sow them early in the year as they don't like summer that much!
The spuds could be at the end of their natural growth period and be dying back leaving the tubers to grow next year That's how they evolved to cope with frosts in the mountains of Latin America where they come from originally. You would be expecting that to happen about now.
Title: Re: Potato blight??????
Post by: Ruth Rocket on September 02, 2011, 23:00:12
Hi George the Pigman,
Thanks for replying, that would be awesome if that is the case, I am not so worried about the beans so I can deal with that!
Do the pictures look normal, for potatoes dying back then?  I was worrying as the tomatoes went completely rotten, leaves, stem and fruit and they were in the same bed.
Title: Re: Potato blight??????
Post by: George the Pigman on September 02, 2011, 23:11:31
It can be difficult to tell in the early stages. Outdoor tomatoes are much much more prone to blight than modern spuds . If in doubt cut  off all the tops of the spuds down to the base and burn the tops. Most spuds would be finishing now anyway.
Title: Re: Potato blight??????
Post by: Ruth Rocket on September 02, 2011, 23:23:14
Cool, thanks for the advice,  all the tomatoes were given to me, I always try to say no to them, but I  always end up with some that don't work out..... I will let you know if the potatoes work out.   At what point should I chop the tops off, if it is blight? Sorry for the many questions!

Title: Re: Potato blight??????
Post by: Alex133 on September 03, 2011, 06:21:17
If you have late blight it will move very quickly and you'll see black splodges on the stems as well as the leaves - you have to cut them down before it can travel into the tubers.
If you look up blightwatch.co.uk you'll have access to masses of info on blight, including pictures, from the Potato Council.
Title: Re: Potato blight??????
Post by: Ruth Rocket on September 03, 2011, 08:24:01
Thanks Alex133, I will do that now :)
Title: Re: Potato blight??????
Post by: Robert_Brenchley on September 03, 2011, 17:54:01
That does look like the early stages of late blight. If it is, then it has a habit of staying as it is in dry weather, then everything rots overnight as soon as you get rain. This late in the season I'd be inclined to cut all the foliage down and compost it, under cover so it can't spread the spores.
Title: Re: Potato blight??????
Post by: Pescador on September 03, 2011, 22:08:44
Certainly looks like Blight. I'd cut the tops off  immediately and burn them.
I'd only compost them if you are confident your compost heap is getting hot enough to destroy the spores; otherwise you'll have a bigger problem next year
Title: Re: Potato blight??????
Post by: Ruth Rocket on September 04, 2011, 09:33:19
Thanks Robert_brenchley and Pescador :) i have now murdered all potatoes, very sad day!   But thanks for the advice!  Hopefully we will have more success next year! Xx
Title: Re: Potato blight??????
Post by: George the Pigman on September 04, 2011, 12:49:25
Ruth
the spuds themselves should be OK at thsi stage! Hope you didn't bin them - only the tops.!

Title: Re: Potato blight??????
Post by: cornykev on September 04, 2011, 14:18:40
As Pigman says the spuds will be fine so its not a sad day.   ???
Title: Re: Potato blight??????
Post by: MervF on September 04, 2011, 15:49:46
I usually dig them about 3 weeks after I have cut the haulms down.   I have done this with all of mine this year and the potatoes are fine.
Title: Re: Potato blight??????
Post by: Ruth Rocket on September 04, 2011, 17:55:18
I didn't bin the potatoes, just the tops, some were much smaller tho and hadn't flowered yet, so I was being dramatic, felt like I was ordering my babies!  Thanks again for the advice, I don't feel quite as despondent as I did!

just had an email from the allotment shop re ordering seed potatoes for next year, so will buy some of the blight resistant ones and try again! Xxxx
Title: Re: Potato blight??????
Post by: cornykev on September 04, 2011, 19:02:52
When did you plant them Ruth, I ask because the flowering should be finished and the plants dieing off by now, as Merv says leave them in for 2/3 weeks before digging them up.   ;D
Title: Re: Potato blight??????
Post by: Ruth Rocket on September 04, 2011, 23:11:55
Hi corneykev,
We got the allotment on June 17th and maybe chucked them in 4 weeks later-ish, lots of people said they would clear the ground of weeds and a few people said maybe it wasn't too late!  We have had 2 meals from one of the plants already, and if the others are ok in the ground we will have quite a few more which is cool.
Just so I understand, I will leave them in for 2/3 weeks, why is this? xxxxx
Title: Re: Potato blight??????
Post by: Ruth Rocket on September 04, 2011, 23:14:03
Oh and the others which i have still left in the ground, were planted first week of august, from suttons, to plant at this time, not sure if they are ok though they did have 2 dodgy leaves which i have taken off.  I will watch closely and get rid of if needed!
Title: Re: Potato blight??????
Post by: Ruth Rocket on September 04, 2011, 23:15:40
Quote from: Ruth Rocket on September 04, 2011, 17:55:18
I didn't bin the potatoes, just the tops, some were much smaller tho and hadn't flowered yet, so I was being dramatic, felt like I was ordering my babies!  Thanks again for the advice, I don't feel quite as despondent as I did!

just had an email from the allotment shop re ordering seed potatoes for next year, so will buy some of the blight resistant ones and try again! Xxxx



Supposed to be murdering my babies!  Ha!  Predictive text on iPad Gah!
Title: Re: Potato blight??????
Post by: pumkinlover on September 04, 2011, 23:23:26
Ruth, by cutting off and removing the haulms you break the cycle of infection. The fungus which causes blight cannot live except on living potato tissue. Take the infected tops away and leave for 3 weeks, then lift  the potatoes and hopefully the blight has not reached them.
Title: Re: Potato blight??????
Post by: Unwashed on September 04, 2011, 23:34:41
That looks very much like late blight to me.  I've found Desiree to be quite susceptible.  It develops very quickly so by now I'd expect the tops to look dreadful.  Only option is to cut off all the tops and take them to the dump, and if you're really lucky the spores won't have washed down through the soil onto the tubers.
Title: Re: Potato blight??????
Post by: Ruth Rocket on September 05, 2011, 09:16:26
Thanks again for the info pumpkin lover and unwashed :).
Title: Re: Potato blight??????
Post by: George the Pigman on September 05, 2011, 12:02:54
Since you only planted them in August it is very likely to be blight as normal die back wouldn't have started yet!
You need about 60-90 days before first or second earlies start to die back and 90 to 120 days for main crops. It was a bit to late to plant spuds and get anything of reasonable size before the blight, slugs or the frost get them! Anything you got was a bonus.
Title: Re: Potato blight??????
Post by: Ruth Rocket on September 05, 2011, 12:23:48
Cool, thanks for that info, I will jot it down on my potato list, when I planted them I knew it was late, but was kind of hopeful that they would work.  On the positive side we have already eaten double the amount that we planted so yes that is a bonus.
Title: Re: Potato blight??????
Post by: cornykev on September 05, 2011, 14:28:40
If you got the plot that late then you didn't have a choice, so as you said at least you've had a few meals out of them.
I put my earlies in in March and follow weeks later with middles and so on, but it will depend on your area and the weather, good luck with the other spuds.    ;D
Title: Re: Potato blight??????
Post by: Robert_Brenchley on September 05, 2011, 19:03:11
Given the stage the foliage blight was at in your photo, you shouldn't have any tuber blight. Keep an eye open for spuds which begin to rot. The fungus can't live in dead tissue, as Pumpkinlover said, which is why it's OK to compost the tops.
Title: Re: Potato blight??????
Post by: Ruth Rocket on September 08, 2011, 21:59:54
Thanks cornykev and Robert_brenchley, I am going to print this thread and pop it in my allotment notes :).
I cut off the tops of the next bed of potatoes as they looked quite bad.  Looking around our allotment site I think probably all of the outdoor tomatoes have it and a quite a few of the other potatoes.  Just wondering if other plots have it, but leave their tops on and their tomatoes in the ground with it, is there any point growing these things nearby?  Or if you buy the resistant varieties will all be ok?

I had to bin all my carrots too today as they were riddled with little skinny maggot things which I guess are carrot flies?

I did however have a lettuce the size of my bottom! Lol!  And my first turnip! 
Title: Re: Potato blight??????
Post by: superspud on September 21, 2011, 15:06:06
Glad I read this one!,  sent the wife out to dig up some eddies we had planted and looked a bit iffy on top, found they were huge underground so she is pleased, shouted something about "at last a real baking size spud not like tesco's mini sizes".

Our only success this year apart from the beetroot...
Title: Re: Potato blight??????
Post by: antipodes on September 21, 2011, 15:36:00
Ruth, next year you can be planting your spuds in March/April and you will be harvesting your big maincrops by this time next year (usually they have about 120 days to harvest, down to 90 days for early varieties). Don't worry, there is always 2012...
And you know now to keep tomatoes and potatoes well separate - they are family so both prone to the same blight disease.
Title: Re: Potato blight??????
Post by: Ruth Rocket on September 21, 2011, 15:42:45
Quote from: antipodes on September 21, 2011, 15:36:00
Ruth, next year you can be planting your spuds in March/April and you will be harvesting your big maincrops by this time next year (usually they have about 120 days to harvest, down to 90 days for early varieties). Don't worry, there is always 2012...
And you know now to keep tomatoes and potatoes well separate - they are family so both prone to the same blight disease.

Yes, I am looking forward to 2012,  hopefully i have learned a lot this year!  There really is nothing like the taste of homegrown potatoes!  I am definately printing off all the advice I have had on this thread! x Thanks x
Title: Re: Potato blight??????
Post by: realfood on September 21, 2011, 19:14:09
This is the first year in 15 that there has been virtually no blight on our allotments in Glasgow!
Title: Re: Potato blight??????
Post by: Robert_Brenchley on September 23, 2011, 19:24:58
First time in years we've had almost none, though I have spotted the odd blighty plant around the site. Obviously, it's due to the drought. I'm hoping that most of what overwintered will have been eliminated, though no doubt it's pie in the sky to hope for an allotment site without it for a year or two!