How do I cure rust spots on papyrus stems?

Question

The plants are in a concrete planter with moist soil and that I fill with water each day. But the stems are not very strong even though they have grown to over 6 ft. they are very fraagile.

Answer 1

Rust fungus is a known issue on Papyrus.
Here are some links to help you.

https://www.gardeningknowhow.com/ornamental/foliage/papyrus/papyrus-plants.htm
https://www.gardeningknowhow.com/plant-problems/disease/learn-about-plant-rust-disease-and-rust-treatment.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm