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Tomato blight


 
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mor_rigan
Rank attained: Hazel Tree
Rank attained: Hazel Tree


Joined: 26 May 2009
Posts: 6
Location: Kerry

PostPosted: Fri Aug 14, 2009 8:32 am    Post subject: Tomato blight Reply with quote

My tomatoes are growing in a polytunnel but they developed blight nonetheless. Apparently there's a new strain around (blue 31) or something. I've cut away all the infected stalks and fruit. I've chopped off the tops of the plants. Hoping they'll make a comeback.



But I fear they'll be lost

I heard that there's a sort of incense one can burn in the polytunnel to get rid of the blight at the end of the harvest so it won't lie dormant in the soil. Any idea what that might be?

Are there any organic means of blight prevention and/or control?
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michael brenock
Rank attained: Chlorophyll for blood


Joined: 12 Aug 2008
Posts: 1275
Location: cork

PostPosted: Fri Aug 14, 2009 8:46 am    Post subject: Reply with quote

polytunnel provides the ideal atmosphere for potato blight to spread once it arrives there. The spore or spores were carried by the wind from a nearby infected potato or tomato. A copper based spray is about the best prevention. But even with blight on the leaves you can still get a reasonable crop of fruit. All is not lost, at least the fruit stays firm even if it is black.
michael brenock horticultural advisor (retired)
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mor_rigan
Rank attained: Hazel Tree
Rank attained: Hazel Tree


Joined: 26 May 2009
Posts: 6
Location: Kerry

PostPosted: Fri Aug 14, 2009 11:06 am    Post subject: Reply with quote

I have sprayed them now. But I didn't know black fruit would be ripen anyway.

Thanks very much!
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