Roses forum: David Austin disease id

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7b
Tkhan
Aug 22, 2017 8:39 AM CST
Hi all the leaves on my Winchester cathedral are getting this
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Name: Porkpal
Richmond, TX
Charter ATP Member I was one of the first 300 contributors to the plant database! Keeper of Poultry Farmer Roses Raises cows
Garden Ideas: Level 2 Celebrating Gardening: 2015 Plant Identifier
porkpal
Aug 22, 2017 9:43 AM CST
It looks like a fungus but not the typical black spot. Are the black areas raised? Fuzzy?
Porkpal
7b
Tkhan
Aug 22, 2017 8:06 PM CST
Hi porkpal don't feel fuzzy but I have to go back and take note
I took all the leaves that were affected and sprayed neem
Oil Just in case it was fungus
The rose bush has lots of new buds Hopefully it shall survive!
Name: Porkpal
Richmond, TX
Charter ATP Member I was one of the first 300 contributors to the plant database! Keeper of Poultry Farmer Roses Raises cows
Garden Ideas: Level 2 Celebrating Gardening: 2015 Plant Identifier
porkpal
Aug 22, 2017 8:24 PM CST
Good. Maybe it doesn't matter what the affliction is.
Porkpal
Name: Steve
Prescott, AZ (Zone 7b)
Region: Southwest Gardening Roses Irises Lilies
Image
Steve812
Aug 23, 2017 7:42 PM CST
To me it looks like black spot, but I do have some difficulty distinguishing black spot from downy mildew. When I use the anti-fungal Actinovate on a rose regularly it seems to prevent the infection. Whatever it is, I have lost plants from it in the past. It's not a huge threat when it strikes leaves that have been on the plant for half a season - apart from the fact that it generates spores for new infections. Once it infects new growth it can be a big problem, IME.

In fact, last year my own Winchester Cathedral looked exactly like that in July or August and I had to move it far away from other roses over the winter and spray it very carefully. This year it is clean.
7b
Tkhan
Sep 14, 2017 7:38 PM CST
Thanks Steve
I've been spraying it with neem oil and I found this spray with rosemary garlic and couple other oils which really smells yukky and moved my Falstaff away from WC
I noticed some leaves on Falstaff having some black spots so I took them off asap
WC is still blooming even though it looks very scraggly and I still get some leaves that are affected I'd really hate to get rid of it so I keep spraying whenever I can and the weather here in NYC had been very hot and humid Which is not helping either
I'm new to rose gardening but I do think WC is not that disease resistant as the others Correct me if I'm wrong
Ive ordered 3 more DA roses
Let's see how they will turn out
Name: Steve
Prescott, AZ (Zone 7b)
Region: Southwest Gardening Roses Irises Lilies
Image
Steve812
Sep 15, 2017 4:25 PM CST
Winchester Cathedral is one of the earlier DA hybrids. His breeding program in the last thirty years has put more emphasis on disease resistance, and I think he has had pretty good results, in general. Many of the hybrids such as WC that do suffer from disease also have high level of vigor, and they recover quickly when conditions no longer favor the disease. Giving good support (the right level of watering, feeding, and removing diseased foliage) helps. Sounds like you are doing all the right things. I'm betting that it will do well in spring.

Good luck with your new roses!
7b
Tkhan
Sep 15, 2017 7:40 PM CST
Steve Thank You! Hurray!
Name: Steve
Prescott, AZ (Zone 7b)
Region: Southwest Gardening Roses Irises Lilies
Image
Steve812
Sep 16, 2017 8:05 AM CST
Welcome!

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