. Fungous diseases of plants, with chapters on physiology, culture methods and technique . 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 nurseryof three-year-old white pine seedlings imported from Germany. Many seedlingsof this importation have been distributed to several northeastern states and toCanada. A determined effort is being made to inspect all plantings, to destroythe diseased stock, and also to prevent further importation of the inf
. Fungous diseases of plants, with chapters on physiology, culture methods and technique . 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 nurseryof three-year-old white pine seedlings imported from Germany. Many seedlingsof this importation have been distributed to several northeastern states and toCanada. A determined effort is being made to inspect all plantings, to destroythe diseased stock, and also to prevent further importation of the infected whitepine 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 nearlyone year before the characteristic swellings appear. Details of the outbreak inNew 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. , Perley. T^uropean Currant Rust on the White Pine in Ame
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