. Seedling blight and stack-burn of rice and the hot-water seed treatment. bject to further development. Ricewith slight infections of this type when shipped in damp, warm carsor bottoms for considerable distances, or when allowed to stand formany days under such conditions, may reach its destination withsufficient injury to cause it to be rejected. If not rejected, it wouldbe given an inferior grade on the market. Small flecks, which mightescape the observation of the most critical observer, are capable ofspreading and destroying the entire kernel when the grain is placedin a warm, damp place
. Seedling blight and stack-burn of rice and the hot-water seed treatment. bject to further development. Ricewith slight infections of this type when shipped in damp, warm carsor bottoms for considerable distances, or when allowed to stand formany days under such conditions, may reach its destination withsufficient injury to cause it to be rejected. If not rejected, it wouldbe given an inferior grade on the market. Small flecks, which mightescape the observation of the most critical observer, are capable ofspreading and destroying the entire kernel when the grain is placedin a warm, damp place. The exact degree of moisture required tocause these stains to develop is not known, but the humid atmosphereof the southern rice sections is known to favor this trouble. Hightemperatures, which are also common in the South, favor the develop-ment of these stains. If the rice is stacked damp or is allowed togo through a sweat after stacking it is likely to become stained ifthe temperatures remain sufficiently high for a few days, SEEDLING BLIGHT AND STACK-BURN OF CAUSES OF INJURY. The seed-injury phase and symptoms of the trouble were touchedupon previously by Godfrey,2 who reported the occurrence of a leaf-spot on rice in Louisiana in 1916. He said the disease looked verymuch like the black rust of cereals. Again in 1920, after the writersinvestigations were begun, Godfrey3 reported the occurrence of a seedling disease of rice andstates that the cause wasfound by Dr. H. B. Hum-phrey to be due to an or-ganism belonging to theMycelia sterilia group offungi. The fungus wascharacterized by very smallblack sclerotia and a whitesterile mycelium. He fur-ther states that the fungusclosely resembles the Sclero-tium found associated withthe leaf disease reported in1916. Godfrey found thefungus constantly associatedwith rice seed grown inLouisiana, particularly theBlue Rose and Hondurasvarieties. California seed,however, was found to befree from the fungus. The cause of these tro
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