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Produce => Pests & Diseases => Topic started by: gwynleg on July 11, 2008, 16:25:11

Title: Blight already.... Advice needed please.
Post by: gwynleg on July 11, 2008, 16:25:11
Yep - its got my seconds and remaining earlies. I have taken off the haulms but how long can I keep the potatoes under ground - do they keep best there (slugs) or dug, dried in the sun (ahem), and put in bags like main crops? Or do I really need to fill the fridge with them?
Thanks
Title: Re: Blight already.... Advice needed please.
Post by: Tee Gee on July 11, 2008, 17:18:54
Cut off the tops asap.

Leave the potatoes in the soil and pick as required.

Use earlies first and second earlies next.

OK a few slugs might get into them but this is a lot less of a problem than if the blight gets into them.

Sorry to here of your problem
Title: Re: Blight already.... Advice needed please.
Post by: tim on July 11, 2008, 17:29:50
Our RDY succumbed overnight!
Title: Re: Blight already.... Advice needed please.
Post by: Sparkly on July 11, 2008, 17:34:24
Oh dear! Haven't been down to the plot today, but am dreading checking the spuds tommorrow with the weather we have had!
Title: Re: Blight already.... Advice needed please.
Post by: tim on July 11, 2008, 17:36:38
I am surprised that it has been warm enough.
Title: Re: Blight already.... Advice needed please.
Post by: Sparkly on July 11, 2008, 17:43:15
It's been warm here... boo hoo
Title: Re: Blight already.... Advice needed please.
Post by: redimp on July 11, 2008, 17:46:41
I haven't had a full smith period since the 7th June.  Perhaps that's why we grow so many in Lincs!
Title: Re: Blight already.... Advice needed please.
Post by: gwynleg on July 12, 2008, 22:46:00
But actually a neighbour has told me I am panicking too soon and it is just that they are dying back. What a relief. Sorry for the panic but I am still keeping a very close eye on them!!!!
Title: Re: Blight already.... Advice needed please.
Post by: manicscousers on July 13, 2008, 08:24:47
we've had this, too..there's one bloke telling  the new people they have blight, he's got them spraying with dithane, I've managed to calm them down, their plants are just dying back, they're now the proud owners of some lovely spuds.. ;D
Title: Re: Blight already.... Advice needed please.
Post by: mc55 on July 19, 2008, 17:00:48
please look at my Vales Emeralds and tell me whether they have blight, or whether this is just part of the natural cycle.  Only one plant is affected in this way so far.  They are next to my main crop, which looks very green, strong and healthy (so far anyway)

(http://farm4.static.flickr.com/3189/2682755992_711e09a5ce_o.jpg)

I'm hoping its just sun scorch ... what do you think ?
Title: Re: Blight already.... Advice needed please.
Post by: redimp on July 19, 2008, 17:47:04
I think it is the plant dying back because it's job is done.  Dig them up and enjoy them for Sunday dinner.
Title: Re: Blight already.... Advice needed please.
Post by: MrsKP on July 24, 2008, 06:14:14
We've had 6 Full Smith Periods so far this month and although they haven't updated for the last two days yet, i've a feeling you can add another couple on.  It has been very warm and humid just lately and I've not been up to the plot since the weekend when I didn't get chance to spray.

I'm a little bit scared if the truth be known, but if I get out of work early enough, i'm up there tonight armed with my copper stuff and sprayer.  Fingers crossed.
Title: Re: Blight already.... Advice needed please.
Post by: Robert_Brenchley on July 24, 2008, 09:29:25
No Smith period here since 6-7 July. As long as it's only one a month or so I'm not too worried.
Title: Re: Blight already.... Advice needed please.
Post by: tim on July 25, 2008, 08:36:38
If this is not blight............it's ugly enough to be! But it's not rampant. Two rows have got it & I've cut down the haulms just in case.

Two different varieties.
Title: Re: Blight already.... Advice needed please.
Post by: Susiebelle on July 25, 2008, 08:44:21
Will some one plse put me out of my misery whats "Smith period"
Title: Re: Blight already.... Advice needed please.
Post by: growmore on July 25, 2008, 09:42:47
Susiebelle, I think its a 24 hour period when temp and humidity are perfect  for blight conditions  .But I could be mistaken  :)
Title: Re: Blight already.... Advice needed please.
Post by: ceres on July 25, 2008, 09:49:11
"A full Smith Period has occurred when:
--------------------------------------------------------------------------------
At least two consecutive days where min temperature is 10ÂșC or above and on each day at least 11 hours when the relative humidity is greater than 90%. "


http://www.blightwatch.co.uk/content/bw-Smith.asp (http://www.blightwatch.co.uk/content/bw-Smith.asp)
Title: Re: Blight already.... Advice needed please.
Post by: twinkletoes on July 25, 2008, 09:52:27
I thought blight manifested itself by making the stems go black/dark brown?  Not just the foliage going yellowy.  ???
twinkletoes
Title: Re: Blight already.... Advice needed please.
Post by: Sparkly on July 25, 2008, 09:59:57
I think we have it!!  :'( :'( :'( :'( :'( Definately have brown patches on the leaves..... these are 2nd earlies though and the crop is ready. Shall I cut the tops off and leave them in the ground then harvest in a couple of weeks?
Title: Re: Blight already.... Advice needed please.
Post by: redimp on July 25, 2008, 12:00:38
Quote from: tim on July 25, 2008, 08:36:38
If this is not blight............it's ugly enough to be! But it's not rampant. Two rows have got it & I've cut down the haulms just in case.

Two different varieties.

What sort of varieties Tim.  Looks like die back to me - and I hope I am right!
Title: Re: Blight already.... Advice needed please.
Post by: Flunky on July 25, 2008, 12:58:46
I too have have brown patches I have posted seperately. All I could find in internet is either them dying off or a magnesium defficiency. I am no expert. I dont think its blight and nor did my neighbour who knows a fair bit.
Title: Re: Blight already.... Advice needed please.
Post by: MrsKP on July 26, 2008, 05:43:19
Was up at the lottie last night and thankfully didn't find anything to worry about.  Had more dodgy looking leaves on the broad beans than the spuds, but I sprayed the spuds anyway ..... that's what you're meant to do isn't it ?  Prevention rather than cure ?

Oh and beg your pardon, we've had 5 SPs this month.  It would appear that we had 0 hours of humidity yesterday?  Doesn't feel like it to me.  ::)
Title: Re: Blight already.... Advice needed please.
Post by: tim on July 26, 2008, 08:59:12
On the left, Clanger, Mira. T'other is Rooster.

Also cut down Markes because they were looking very sad. Very bad scab. Never had it before.
Title: Re: Blight already.... Advice needed please.
Post by: saddad on July 26, 2008, 09:43:12
Only got one pic Tim?  ???
Title: Re: Blight already.... Advice needed please.
Post by: redimp on July 26, 2008, 10:25:28
Quote from: tim on July 26, 2008, 08:59:12
On the left, Clanger, Mira. T'other is Rooster.

Also cut down Markes because they were looking very sad. Very bad scab. Never had it before.

Hmmm - just my firsts and seconds dieing back at the moment but I would have thought Mira would put up more of a fight!
Title: Re: Blight already.... Advice needed please.
Post by: tim on July 26, 2008, 12:14:10
See yesterday's post, Dad?
Title: Re: Blight already.... Advice needed please.
Post by: Ishard on July 28, 2008, 07:21:11
I havent had a full SP warning, only 1 'near miss' warning but my spuds still have blight. :(
Title: Re: Blight already.... Advice needed please.
Post by: Barnowl on July 28, 2008, 11:20:59
Quote from: tim on July 26, 2008, 08:59:12
On the left, Clanger, Mira. T'other is Rooster.

Also cut down Markes because they were looking very sad. Very bad scab. Never had it before.


Lack of moisture in the soil?

I get light scab quite often on my container grown spuds because they can dry out very quickly.