The smuts are fungi, mostly Ustilaginomycetes (of the class Teliomycetae, subphylum Basidiomycota), that cause plant disease.
Smuts affect grasses, notably including cereal crops such as maize. They initially attack the plant's reproductive system, forming galls which darken and burst, releasing fungal spores which infect other plants nearby.
A smut infestation is controlled by removing and destroying the infected plants. In agriculture, this process is known as destruction of the initial inoculum.
There are several types of smut including:
