Mandevilla Plants
Q.

rusty orange fuzzy fungus on mandevilla

Zone 5 | daclkc added on August 14, 2015 | Answered

What is the rusty orange fuzzy fungus appearing on about two inches of the end of each stem on a Mandevilla? Is it a fungus or pollen? If it is fungus, how should I treat it? The plant is otherwise very healthy producing lots of shoots and flowers.

A.
A.Answers to this queston: Add Answer
Downtoearthdigs
Certified GKH Gardening Expert
Answered on August 16, 2015

Likely you are describing Rust disease.

You can remove the diseased leaves and dispose of. Treat the plant with Neem Oil.
Here are links with more information.

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

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