103] Pilze als Erreger von Pflanzenkrankheiten 263 



963. PejTonel, B. II marciume amaro o marciume del cuore 

 delle melle e delle pere. (Bol. mensile dl Inform, e Xotizie d. Reg. Staz. 

 di Fatol, veget. di Roma II, 1921, p. 23—27, 3 Fig.) — Siehe „Fflanzen- 

 krankheiten", Ref. Nr. 300. 



964. Pillicliody, A. Le ..poiirri" de la tige {Trametes Pini). (Se& 

 manif estations dans les vieux peuplements de la Vallee de Joux.) 

 (Journ. forest. Suisse LXXII, 1921. p. 223—226.) 



965. Po\ak, A. H. W. An attaek of poplar canker following 

 fire injury. (Fhytopathology XI, 1921, p. 1.57 — 165, 3 Fig.) — Siehe 

 ..Pflanzenkrankheiten'', Ref. Nr. 336. 



966. Quanjer, M. H. Goulde ponr rinspection aux ehampes 

 et pour la selection des pommes de terre. (Verslag en Mededeel, 

 Phytopatholog. Dienst Wageningen Nr. 6a. 1921, 27 pp., 4 Taf.) 



967. Rambousek, Fr. Zärodky chorob na fepovem semene. 

 [Krankheitskeime auf Rübensamen.] (Ochraiia rostlin Prag, 1921, 

 Nr. 5/6, p. 16.) 



968. Ramirez, R. Cyaihus de la Vid. (La Rev. Agricola Mexico V, 

 1921, p. 720, 1 Fig.) — Siehe „Pflanzenkrankheiten", Ref. Nr. 320. 



969. Ramirez, R. Piagas de la Agricultura en el distrito 

 federal. (La Rev. Agricola Mexico V, 1921, p. 662—663.) 



970. Reinkiiiff, 0. A. C/7r«s diseases of the Philippines, southerii 

 China, Indo-China and Slam. (Philippine Agr. IX, 1921, p. 121 — 179, 

 pl. 1—14.) 



971. Reinking, 0. A. Diseases of economic plants in Indo- 

 China and Slam. (Philippine Agr. IX, 1921, p. 181—183.) 



972. Rhoads, A. S. Some new or little known hots for wood- 

 destroying fungi. III. (Phytopathology XI, 1921, p. 319— 326.) — Siehe 

 „Pflanzenkrankheiten", Ref. Nr. 337. 



973. Richards. B. L. A dryrot canker of sugar beets. ( Joiirn. Agric. 

 Research XXII, 1921, p. 47—52, 6 pl.) — Siehe „Pflanzenkrankheiten", Ref. 

 Nr. 121. 



974. Richards, B. L. Pathogenicity of C'^rticiiim vagiim on the 

 potato as affected by soll temperature. (Journ. Agr. Research XXI, 

 1921, p. 482—495, Tab. 88—93, 5 Fig.) 



975. Ritzenia Bos. ^lijn proefveldje bij het Institut voor 

 Phytopathologie van 1906 — 1921. (Tijdschr. over Plantenziekten 1921, 

 p. 29—44.) — Siehe „Pflanzenkrankheiten", Ref. Nr. 649. 



976. Roberts, J.W. Pium blotch, a disease of the Japanese 

 plum, caused by Phyllosticta congesta Heald et Wolf. (Journ. of Agric. 

 Research XXII, 1921, p. 365—370, 1 pl., 2 Fig.) 



977. Rosen. H. R. Ergot on Paspalum. (Mycologia XII, 1920, p. 40 

 bis 41.) 



978. Salmon, E. S. The potato „blight" fungus on tomatoes 

 under glass in April. (Gard. Chron. LXIX, 1921, p. 311 312.) 



979. Salmon, E. S. On forms of the Hop (Humulus lupulus L.) 

 resistant to mildew (Sph.aerotlieca luirniili [DC] Bear.). (Ann. of Aj)pl. 

 Bot. VIII, 1921, p. 146—163.) 



980. Salmon. E. S. and Wormald, H. A study of the Variation in 

 seedlings of the wild hop {Humulus lupulus L.). (Journ. of Genetics 

 XI, 1921, p. 241—268, 1 Tab.) — Siehe „Pflanzenkrankheiten", Ref. Nr. 550. 



