. Fig. 23.—Loose smut of oats. Loose smut is conspicuous when oat plants are heading. Usually the spikelets of a diseased head are entirely trans- formed into a mass of black powder, which consists of spores by which the smut fungus is spread. By harvest most of the spores have been shattered off, and a bare spike remains. of them lodge on healthy heads, either on the chaff or between the chaff and the young kernels. Some of these spores germi- nate immediately, growing into the hulls or into the seed coats of the kernels and remaining inactive there until the seed is sown the following year.
. Fig. 23.—Loose smut of oats. Loose smut is conspicuous when oat plants are heading. Usually the spikelets of a diseased head are entirely trans- formed into a mass of black powder, which consists of spores by which the smut fungus is spread. By harvest most of the spores have been shattered off, and a bare spike remains. of them lodge on healthy heads, either on the chaff or between the chaff and the young kernels. Some of these spores germi- nate immediately, growing into the hulls or into the seed coats of the kernels and remaining inactive there until the seed is sown the following year. Other spores do not germinate imme- diately but remain on the seed, in the grooves or between the kernels and the hulls, until the seed is sown. In any case, after
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Keywords: ., bookcentury1900, bookcolle, bookpublisherurbana, booksubjectgrain
