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Potato blight, how to treat Phytophthora infestans.


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Liparis
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Joined: 23 Sep 2007
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Location: Co. Meath

PostPosted: Wed Jul 08, 2009 2:47 pm    Post subject: Reply with quote

Phew! Laughing
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Her Outdoors
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Joined: 07 Jul 2008
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Location: West of Ireland

PostPosted: Wed Jul 08, 2009 7:42 pm    Post subject: Reply with quote

Fiachra wrote:
Hi everybody,
Realx! I was just going to pick some to make the anti-blight tea.
Thanks anyway


Hi Fiachra - if you give me the recipe, I can supply the whole if Ireland!!

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MaureenDillon
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PostPosted: Tue Jul 28, 2009 9:15 am    Post subject: Blight on blight resistant potatoes! Reply with quote

Hi,

I planted some Sarpo Axona beside some Robinta and Sante main crop potatoes.

I noticed a few leaves displayed blight symptoms last night, (mainly on the Sante crop) so in my panic, I sprayed with Dithane, (of course, Murphy's Law, it rained shortly after!)

I checked this morning and it's looking slight worse. Even the Sarpo Axona have been affected!!

Two queries:
1. How can the Sarpo Axona have blight when they are supposed to be blight resistant? I did read somewhere that if you pick the leaves off it, the leaves grow back quick enough.
2. As for the other two varieties, I read somewhere that you can pick all the affected leaves off and still spray the Dithane to prevent the blight spreading - is this true?

Thanks,
Maureen.
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Liparis
Rank attained: Orchard owner


Joined: 23 Sep 2007
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Location: Co. Meath

PostPosted: Tue Jul 28, 2009 10:18 am    Post subject: Reply with quote

The key word is resistant, they aren't blight-proof. Will be interesting to see if others who grow saporo and haven't sprayed get it.
Bill.

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slugsaway
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PostPosted: Mon May 17, 2010 12:31 pm    Post subject: Reply with quote

Ok so we're back to the blight problem and I'm not prepared! Just was out on my walk and collected some Horsetail to make the brew this evening, hopefully it won't rain till tomorrow. Going to use the boiling method, but don't have ant rainwater collected, can I use bottled water, I presume I can't use tap water because it has chlorine added... Also do I use this like the burgandy mixture, spraying the leaves top and underside? And final question, how soon does this need to be done before rain to be effective?
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