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Brown patches on virginia creeper


 
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MisseyB
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PostPosted: Wed Aug 10, 2011 9:13 pm    Post subject: Brown patches on virginia creeper Reply with quote

My virginia creeper has started to look a bit worse for wear. The damage only appeared about 2 weeks ago. The plant has been growing in the same spot on an east facing wall for about a year now. It's a fairly sheltered spot and I can't see any insect activity on it.

Thanks in advance for any advice.

E



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The Garden Shop
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PostPosted: Thu Aug 11, 2011 12:08 pm    Post subject: Re: Brown patches on virginia creeper Reply with quote

MisseyB wrote:
My virginia creeper has started to look a bit worse for wear. The damage only appeared about 2 weeks ago. The plant has been growing in the same spot on an east facing wall for about a year now. It's a fairly sheltered spot and I can't see any insect activity on it.

Thanks in advance for any advice.

E

Hi missyb,
Looks like a fungal problem. Treat with a rose fungal control and see does that help. Remove and destroy affected leaves though, very important.
Good luck

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gardenman
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PostPosted: Thu Aug 11, 2011 1:56 pm    Post subject: Reply with quote

These types of diagnosis are always tricky as there are literally dozens of reasons for scorching of foliage, from frost, salt, wind, sun and disease possibilities.
The most likely in this situation however, is probably a Potassium nutritional deficiency. The tell tale signs being the inter-veinal 'scorching' clearly visible on one of the leaves in the centre of the photo. The leaf margin scorching and curling is another indication.
Fungal, bacterial, or wind etc. damage would show leaf margin scorching but would not show inter-veinal necrosis/browning.
Best treated with a high K fertilizer.
Nutrient disorders can be very difficult to diagnose esp. Potassium, however its as good an educated answer as I can muster at he minute.
I hope this makes some sense at least.



http://www.hbci.com/~wenonah/min-def/list.htmThis link might explain it better than me Sad

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MisseyB
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PostPosted: Fri Aug 12, 2011 7:21 pm    Post subject: Thank you Reply with quote

Thank you to both of you for your great advice. I'm going to do a belts and braces effort and feed and spray the plant.

All the best
E
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michael brenock
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PostPosted: Fri Aug 12, 2011 11:30 pm    Post subject: Reply with quote

not potassium deficiency in my opinion as it is not widespread throughout the plant, probably scorching due to intermittent rain and sun. I would not recommend spraying nor feeding.
michael brenock horticultural advisor (retired)
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