. Fig. 39.—Stripe rust of wheat: A, red pustules (uredinia, or sori) of summer spores together with black pustules (telia) of winter spores; B, normal stripe of rust confined between parallel ribs. (From Bui. 511.) Ceresan is liable to reduce germination, especially with wheat. Some varieties of wheat are more resistant to covered smut than others. The Division of Agronomy, College of Agriculture, Davis, is carrying on breeding work to develop disease-resistant cereal varieties and should be addressed for latest information. Loose smut of wheat, caused by Ustilago tritici (fig. 37), is similar
. Fig. 39.—Stripe rust of wheat: A, red pustules (uredinia, or sori) of summer spores together with black pustules (telia) of winter spores; B, normal stripe of rust confined between parallel ribs. (From Bui. 511.) Ceresan is liable to reduce germination, especially with wheat. Some varieties of wheat are more resistant to covered smut than others. The Division of Agronomy, College of Agriculture, Davis, is carrying on breeding work to develop disease-resistant cereal varieties and should be addressed for latest information. Loose smut of wheat, caused by Ustilago tritici (fig. 37), is similar to the disease of barley of the same name, infection taking place in the flowers so that the fungus is inside the seed when planted. Loose smut of wheat is not serious enough in California to need treatment. Speckled Leaf Blotch.—This disease is characterized by light spots about the size of pinheads appearing on the leaves. These develop into
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Keywords: ., book, bookcentury1900, bookleafnumber63, booksubjectplantdiseases
