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Windmill grass (Chloris truncata) is a native species and is the tenth most common summer weed species in the Western Australian wheatbelt.
Cereal smut and bunt diseases are caused by fungi which parasitise the host plant and produce masses of soot-like spores in the leaves, grains or ears.
Stripe rust (Puccinia striiformis f. sp. tritici) and leaf rust (Puccinia triticina) can be a significant threat to wheat crops in Western Australia in some seasons.
Stem rust (Puccinia graminis f. sp. tritici) is a foliar disease that can significantly reduce wheat yields if it occurrs in early spring and is not controlled.