Damaged grains are those rendered unfit for human consumption and, as regards feed grain, for consumption by cattle, owing to putrefaction, mildew, or bacterial or other causes. Grains which have deteriorated through spontaneous generation of heat also belong to this group; these "heated" or "smutty" grains are fully grown grains in which the tegument is coloured greyish brown to black, while the cross-section of the kernel is coloured yellowish grey to brownish black. Grains attacked by wheat-midge shall be considered as damaged grains only when more than half the surface of the grain is coloured grey to black as a result of secondary cryptogamic attack. Where discoloration covers less then half the surface of the grain, the latter must be classed with grains damaged by pests., riknenud, mädanenud, hallitanud, söestunud, pruunistunud rukki-, nisu- ja odraterad, kõik silmanähtavalt riknenud endospermiga, mille värvus on muutunud pruunist mustani, samuti heledad, kuid kergestipudeneva endospermiga terad