Ask a Question forum→4 year old climbing Rose bush that has some kind of fungus

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Massachusetts
wnoone2000
May 17, 2020 5:59 PM CST
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
Name: sumire
Reno, Nevada (Zone 6a)
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sumire
May 17, 2020 11:35 PM CST
Can you post some photos of the rose bush and the effected leaves?
www.sumiredesigns.com
Name: Lynda Horn
Arkansas (Zone 7b)
Eat more tomatoes!
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gardenfish
May 18, 2020 2:43 AM CST
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
Name: Luis
Hurst, TX, U.S.A. (Zone 8a)
Dog Lover Region: Texas Salvias Roses Hibiscus Plumerias
luis_pr
May 18, 2020 3:11 AM CST
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.
Name: Lynda Horn
Arkansas (Zone 7b)
Eat more tomatoes!
Lover of wildlife (Raccoon badge) Container Gardener Lilies Cat Lover Lover of wildlife (Black bear badge) Zinnias
Organic Gardener Heirlooms Bee Lover Hummingbirder Echinacea Tomato Heads
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gardenfish
May 18, 2020 6:37 AM CST
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
Massachusetts
wnoone2000
May 18, 2020 10:00 AM CST
Thank you for your help
Name: Lynda Horn
Arkansas (Zone 7b)
Eat more tomatoes!
Lover of wildlife (Raccoon badge) Container Gardener Lilies Cat Lover Lover of wildlife (Black bear badge) Zinnias
Organic Gardener Heirlooms Bee Lover Hummingbirder Echinacea Tomato Heads
Image
gardenfish
May 18, 2020 10:18 AM CST
You are most welcome!
Yesterday is gone. Tomorrow has not yet come. We have only today. Let us begin.
Mother Teresa
Massachusetts
wnoone2000
May 19, 2020 7:51 AM CST
Thank you for your help

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