Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] PHRAGMIDIUM 313 dark brown, 3-8 septate, 75-100X26-30 [i, pedicel long, thickened in the middle. The infection in spring depends entirely on the presence of teleutospores present on fallen leaves, consequently all fallen leaves should be either buried by digging during the winter or by sweeping up and burning. Plants that have Fig. 92.—Plu-agmidium stibcorticatum. i, rose branch and leaves with aecidium stage of fungus ; 2, rose leaf with teleutospores ; 3, teleutospores ; 4,

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Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] PHRAGMIDIUM 313 dark brown, 3-8 septate, 75-100X26-30 [i, pedicel long, thickened in the middle. The infection in spring depends entirely on the presence of teleutospores present on fallen leaves, consequently all fallen leaves should be either buried by digging during the winter or by sweeping up and burning. Plants that have Fig. 92.—Plu-agmidium stibcorticatum. i, rose branch and leaves with aecidium stage of fungus ; 2, rose leaf with teleutospores ; 3, teleutospores ; 4, uredospores. Figs, i and 2 nat. size, remainder highly mag. been attacked should be drenched with a solution of sulphate of copper during the winter. Raspberry rust {Phragmidium rubi-idaei, Winter) pro- duces its three stages on the raspberry plant. The aecidium condition appears first on the upper surface of the leaves in the month of June, under the form of greenish-yellow pustules, usually arranged in broken circles. The uredo stage appears next, and differs but little in appearance from the aecidium;

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