Smut

i. A foul spot; the fouling matter itself. 2. A parasitic disease of plants, caused by fungi of the order Ustilaginece, the first exact researches concerning which were published about 1850 by the brothers Tulasne. S. of Broom Corn, Ustilago sorghi (L.K.), Pa er in i. S., Covered, of Barley, Ustilago horde i (P.), Kell and Swingle. S. of Indian Corn, Ustilago maydis,'D..C. S., Naked, of Barley, Ustilago nuda (Jensen), Kell and Swingle. S. of Oats. Ustilago avetue (P.), Jensen, 33- igmt, Kell and Swingle. S. of Rye, Ustilago cult a (Walls), Rabh. S. of Wheat, Bunt, or Stinking Smut, Tilletia fattens, Trelease; Tilletia tritici (Bjerk), Wint The disease is spread by spores of these fungi adhering to the sound grains before they are planted, or by spores in the soil.