Rusts get their name because they are most commonly observed as deposits of powdery rust-coloured or brown spores on plant surfaces. The Roman agricultural festival Robigalia (April 25) has ancient origins in combating wheat rust.
rusTS GEt theiR NaMe becaUSE tHEY ARe Most COmmonly obSerVed as deposIts of POWdery RuSt-cOlourEd or bROWn spores on plaNT suRfaces. the RoMan agricuLtural feSTiVaL robiGALIA (april 25) haS ANcient origINS In coMbAtiNg wheat ruST.