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Avatar for wnoone2000
May 17, 2020 5:59 PM CST
Massachusetts
Hi
I just noticed that my climbing Rose bush has black spots on quite a few of the leaves and some of the leaves are turning yellow. Would you know what is causing this to happen and how can I correct the problem? Sometimes I water the leaves when watering the plant and I just read that's not good.
Is there a homemade fungicide that may work or do I need to go to the nursery?

Thank You
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May 17, 2020 11:35 PM CST
Name: sumire
Reno, Nevada (Zone 6a)
Can you post some photos of the rose bush and the effected leaves?
www.sumiredesigns.com
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May 18, 2020 2:43 AM CST
Name: Lynda Horn
Arkansas (Zone 7b)
Eat more tomatoes!
Bee Lover Lover of wildlife (Black bear badge) Tomato Heads Salvias Lover of wildlife (Raccoon badge) Peppers
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A pic would be good, but from your description it sounds like blackspot, which is a fungal disease.It can be chronic, and usually not curable, but it can be controlled. Don't use homemade sprays; look for an approved manufactured product.
Yesterday is gone. Tomorrow has not yet come. We have only today. Let us begin.
Mother Teresa
Avatar for luis_pr
May 18, 2020 3:11 AM CST
Name: Luis
Hurst, TX, U.S.A. (Zone 8a)
Azaleas Salvias Roses Plumerias Region: New Hampshire Hydrangeas
Hibiscus Region: Georgia Region: Florida Dog Lover Region: Texas
See examples of black spot pictures here:

https://images.search.yahoo.co...

Suggested black spot controls:

https://www.missouribotanicalg...

https://agrilifeextension.tamu...

I would rotate fungicides with different active ingredients. Meaning: the first application may be Fungicide "A" that lasts 7 days. After 7 days, I apply Fungicide "B" that lasts 12 days. After 12 days, I restart the cycle: A for 7 days, B for 12 days and so forth.
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May 18, 2020 6:37 AM CST
Name: Lynda Horn
Arkansas (Zone 7b)
Eat more tomatoes!
Bee Lover Lover of wildlife (Black bear badge) Tomato Heads Salvias Lover of wildlife (Raccoon badge) Peppers
Organic Gardener Native Plants and Wildflowers Morning Glories Master Gardener: Arkansas Lilies Hummingbirder
Luis has the right idea about rotating fungicides. I've been rotating on a yearly basis. However, I might try his method now.
Yesterday is gone. Tomorrow has not yet come. We have only today. Let us begin.
Mother Teresa
Avatar for wnoone2000
May 18, 2020 10:00 AM CST
Massachusetts
Thank you for your help
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May 18, 2020 10:18 AM CST
Name: Lynda Horn
Arkansas (Zone 7b)
Eat more tomatoes!
Bee Lover Lover of wildlife (Black bear badge) Tomato Heads Salvias Lover of wildlife (Raccoon badge) Peppers
Organic Gardener Native Plants and Wildflowers Morning Glories Master Gardener: Arkansas Lilies Hummingbirder
You are most welcome!
Yesterday is gone. Tomorrow has not yet come. We have only today. Let us begin.
Mother Teresa
Avatar for wnoone2000
May 19, 2020 7:51 AM CST
Massachusetts
Thank you for your help
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