What is Rust?
Rust is easily identified by the many orange, yellow or red pustules on leaves or stems which break open
and release masses of spores. Rust grows within the leaf so there is usually a copy of the spores on the underside
of the leaf as well. Different strains of rust attack different host plants so rust on gerananiums won’t spread to other
types of plants. Rust is a common disease of calendulas, roses, snapdragons, geraniums, gerberas and beans. Rust
can also attack turf. Myrtle rust has become a serious disease on plants such as lilly pillys and other native plants.
What are the symptoms?
Orange, yellow or red pustules on leaves or stems.