. Fig. 36.—Covered smut of barley. Although the spikelets of infected heads are transformed to masses of black powder, they remain more or less intact until harvest. The head at the left is normal; the others are smutted. healthy grain, especially in the groove, where they remain dormant until the seed is sown. When the barley seed begins to germinate the spores also germinate and infect the young shoot as it emerges from the seed coat, or shortly afterwards. After the fungus has entered the seedling, it continues to grow with the shoot and eventually replaces the grain and chaff with spore ma
. Fig. 36.—Covered smut of barley. Although the spikelets of infected heads are transformed to masses of black powder, they remain more or less intact until harvest. The head at the left is normal; the others are smutted. healthy grain, especially in the groove, where they remain dormant until the seed is sown. When the barley seed begins to germinate the spores also germinate and infect the young shoot as it emerges from the seed coat, or shortly afterwards. After the fungus has entered the seedling, it continues to grow with the shoot and eventually replaces the grain and chaff with spore masses. These spores are then ready to infect the seed of an- other crop. Importance.—Covered smut occurs in barley fields through- out Illinois and is responsible to a considerable degree for the re- ductions in barley yield attributed to smut infections. Because it generally is not distinguished from loose smut in field surveys, its real importance is not known.
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Keywords: ., bookcentury1900, bookcolle, bookpublisherurbana, booksubjectgrain
