Hello, nice video. I didn't see any natural solutions in your answers and thought you might want to add one. I've found that a mixture of baking soda, dish soup and water made into a spray is outstanding for rust and other issues. Add garlic and you've got a real help. (not my idea mind you. It is a suggestion from others years ago) Using it before there is a huge problem will save more foliage. You can use it when things get bad but as you mentioned you'll need you remove the badly infected leaves. Enjoy kids 🙂
I have my plants outside and has wind but is not enough. I'm in summer season, but There's humidity even in the wind. Rust and fungus is from humidity, the weather is humid per se. I'm planning to make a hole in ground and water through there and cover the hole again so that only the roots are watered.
I sprayed colloidal silver on my raspberry plant yesterday. We shall see. I might need a stronger spray. I also sprayed the ground. I'm going to try to avoid getting the leaves wet when I water
Where I live in Borneo where it's hot and humid especially when it rains every single day will always have rust problems. There is no way to cure it doesn't matter what I spray. All my 10 varieties of figs have rusty leaves.