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Post by Deleted on Oct 23, 2007 11:50:52 GMT
Hubby has just called to let me know that while examining the lottie at lunchtime, he has found red spots on the leaves of some of the cauliflower plants. Any ideas?  |
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Post by lottielady on Oct 23, 2007 14:41:01 GMT
Have no idea - can you take a photo?
LLx
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Post by Deleted on Oct 23, 2007 14:52:10 GMT
No, our camera has decided that it doesn't work with vista  . Hubby is bringing me home a leaf to look at tonight. If I can't identify it, should I leave well alone, or remove the offending leaves do you think? I can't seem to find anything online about spotty caulis! |
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Post by lottielady on Oct 23, 2007 15:06:56 GMT
I've had a look in my books and the only thing I can find about redness on Brassica leaves is a magnesium deficiency, maybe once you get a proper look at it you can describe it and maybe someone will know what to do! Sorry not that helpful is it!  LLx |
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Post by Deleted on Oct 23, 2007 16:42:58 GMT
Sorry! Spots are NOT red (hubby has brought me back a sample!). They are fairly regular in shape, dark brown in the centre and lighter brown on the edges. The brown material is thinner, and definitely dead. HELP!!!!!!  |
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Post by pdblake on Oct 23, 2007 16:46:21 GMT
Best I can find in Dr Hessyon's reckons Leaf Spot(ring spot), encourage by wet weather, brown spots (could be reddish I suppose). Badly affected leaves yellow and fall.
Lottie: Apparantly magnesium deficiency in brassicas causes yellowing of the leaves, according to Dr H anyway. ;D
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Post by Deleted on Oct 23, 2007 16:49:46 GMT
Just done a google search, and I think it's Alternaria Leaf Spot  Thing is, I can't find any information on what to do about it. Should I compost the infected plants? Or just remove the leaves? Will it affect the crop? I just keep getting scientific papers popping up |
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Post by pdblake on Oct 23, 2007 16:55:06 GMT
For Leaf Spot Dr H says to remove diseased parts and spray with something called mancozeb and to burn badly infected plants for. there are lots of different flavours bu the usual kind is ring spot which causes brwon rings on the older leaves. Caused by wet weather and over crowding. looks like it can happen to pretty much anything, not just brassicas. Hope that helps  |
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Post by lottielady on Oct 23, 2007 16:55:11 GMT
Best I can find in Dr Hessyon's reckons Leaf Spot(ring spot), encourage by wet weather, brown spots (could be reddish I suppose). Badly affected leaves yellow and fall. Lottie: Apparantly magnesium deficiency in brassicas causes yellowing of the leaves, according to Dr H anyway. ;D Mine was according to St Geoff PDB  he said it can turn them yellow, reddish or purple! RM maybe an idea to have a look at the plot next to you and see if they have anything similar - and ask them if they have sprayed anything near your plot. LLx |
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Post by Deleted on Oct 23, 2007 16:59:47 GMT
Will get down there tomorrow and have a good root around. I want to be as organic as possible, so I'll remove affected leaves and see what happens. Thanks for your help LL and pb!!!!  |
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Post by lottielady on Oct 23, 2007 17:05:32 GMT
I'd be surprised if you had any really bad diseases on your site RM as it is so new - do you know what was grown there before they turned it in to plots?
If it was me I think I would just remove and burn the affected leaves and then keep a close eye on the rest .
LLx
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Post by pdblake on Oct 23, 2007 17:06:50 GMT
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Post by Deleted on Oct 23, 2007 17:59:46 GMT
LL - it was just a grass field before being turned into plots, I can only think that the infection must have been present in the young plants when I got them  pb - thanks for the info!  |
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. Hubby is bringing me home a leaf to look at tonight. If I can't identify it, should I leave well alone, or remove the offending leaves do you think? I can't seem to find anything online about spotty caulis!
Thing is, I can't find any information on what to do about it. Should I compost the infected plants? Or just remove the leaves? Will it affect the crop? I just keep getting scientific papers popping up 
he said it can turn them yellow, reddish or purple! 
