Methods of Appraising Intensity and Destructiveness of Cereal Rusts With Particular Reference to Russian Work of Wheat Leaf Rust (Classic Reprint) - Tapa blanda

Sinopsis

Excerpt from Methods of Appraising Intensity and Destructiveness of Cereal Rusts With Particular Reference to Russian Work of Wheat Leaf Rust

The method of designating degrees of rustiness by numerals and descriptive terms has been assailed by Russian phytopathologists, particularly Naumov (21) and Rusakov They object to the too limited number of the grades of infection in the scales of Eriksson and Henning and Yachevski, and to the use of descriptive terms in all systems in which a standard diagram matic scale is not used, since such terms as weak or abundant have en tirely different connotations to workers in regions that differ in.the amounts of rust normally present. Thus the reports of different workers are not comparable nor can one determine with approximate accuracy the amount of rust corresponding to such terms.

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