Fungal disease on Rose and Hawthorn.

[Wayfarer]

We have a climbing rose 'Albertine' which has had Rust for the last 2 years. About 3 metres away is a 6 year old Crataegus 'Pauls Scarlet' tree which is also infected with what looks like leaf spot and is losing it's leaves in June/July.
Could these fungal diseases be linked and is there an effective treatment which will save both?
Many thanks for any help.

 

[Mystic Moon Tree]

Thankfully, I haven't had to deal with rust here. Just blight & powdery mildew mostly. Some root & stem rot, pests etc. Its entirely possible they're related, if they're like the relationship between fungus gnats and root rot. Usually when you have one, you have the other. So, I treat most of these things with natural & herbal remedies, because the garden store options are either chemicals with undesireable side effects, or don't work. Have you already tried something as simple as a diluted dawn dishsoap folliars spray on a cooler day reapplied every 10 days for a couple applications?

 

[Wayfarer]

I've tried nothing yet but a natural remedy seems a good way to start ,especially with a product we already have in the house!
We are having a small heatwave here at the moment so I'll wait until it cools down and hope there are still some leaves left on the plants.
Thanks for the info.

 

[Mystic Moon Tree]

No problem. Roses and hawthorn are related, so likely susceptible to a lot of the same diseases. If that doesn't work let me know. I have other more complicated options Also, you can treat at night and wash off before the heat of the day.