. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. Fig. 211. Cronartium Ribicola a, sori on currant leaf; b, sorus and teleutosporic column; c and d: uredospores and teleutospores 1 During June, 1909, the aecidial stage of this fungus was found in a nursery of three-year-old white pine seedlings imported from Germany. Many seedlings of this importation have been distributed to several northeastern states and to Canada. A determined effort is being made to inspect all plantings, to destroy the diseased stock, and also to prevent fur
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. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. Fig. 211. Cronartium Ribicola a, sori on currant leaf; b, sorus and teleutosporic column; c and d: uredospores and teleutospores 1 During June, 1909, the aecidial stage of this fungus was found in a nursery of three-year-old white pine seedlings imported from Germany. Many seedlings of this importation have been distributed to several northeastern states and to Canada. A determined effort is being made to inspect all plantings, to destroy the diseased stock, and also to prevent further importation of the infected white pine seedlings. Inspection of such seedlings at the time of importation is prac- tically valueless, since the fungus has an incubation period in the bark of nearly one year before the characteristic swellings appear. Details of the outbreak in New York are discussed in the following articles: Atwood, G. G. Blister Rust of Pines and the European Currant Rust. Dept. Agl., State of N. Y. Hort. Built. 2 : 1-15. 1909. Spaulding, Perley. European Currant Rust on the White Pine in America. Bur. Plant Ind., U. S. Dept. Agl. Circular 38 : 1-4. 1909.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Duggar, Benjamin M. (Benjamin Minge), 1872-1956. Boston ; New York : Ginn