t 



f 



! 



i 



-4 



(149) 



Silvestri, F. Contribuzione alia conoscenza degli insetti dannosi e dei loro 

 simbionti. II. Plusia gamma. (Boli. Labor. Zool. gen. e agr. Portici V [19111 

 p. 286—319, figg.) ■'' 



I Smith, E. F. On some resemblances of crown-gall to human cancer (Science 



II Ser. XXXV [1912], p. 161-172.) 



Smith. R. E. Withertip. (Cal. Cult. XXXVII [1911], No. 4, p. 76—77.) 



j Smith. Ralph. E. and Smith, Elizabeth. H. California Plant Diseases. (Univ. 



of Californ. Publications, Coll. of Agric. Agricult-Exp.-Stat. Berkeley Bull. 

 No. 218 [1911], p. 1039—1193. 



Sopp, O. J. O. Untersuchungen uber Insekten-vertilgende Pilze bei den letzten 

 Kiefenispinnerepidemien in Norwegen. (Vid.-Selsk. Skr. Christiania [1911], 

 59 pp., 5 Taf. [2 dav. kol.], 5 Fig.) 



Sonauen, P. Pflanzenkrankheiten. (Just's Botan. Jahresbericht XXXVII [1909] 

 I Abt., p. 801—814.) 



— Die Schleimkrankheit von Cyathea medullaris, (Ber. d. Deutsch. Bot. Ges. 



XXX [1912], p. 42-48, Taf. 11.) 



— Erkrankungsfalle bei Orchideen. (Zeitschr. f. Pflanzenkr. XXI [1911], 

 p. 387— 394 ) 



A Southern Grower. Spraying for Big Buds. (Gard, Chron. LI [1912], p. 124.) 

 Spratt, Ethel Rose. The Morphology of the Root Tubercles of Alnus and 



Elaeagnus, and the Polymorphism of the Organism causing their Formation. 



(Ann. of Bot. XXVI [1912], p. 119—128, PI. XIII and XIV.) 



Starkenstein, Emil. tJber Gallen von Pistacia Terebinthus L. (Lotos LIX 



[1911], p. 194—203. Mit 7 Abb. im Text.) 

 Sterllni. Potatos diseased. (Gard. Chron. LI [1912], p. 130.) 

 Stevens, F. L. Progress in control of plant diseases. (The popular sci. 



monthley [1911], p. 469—476.) 



— A serious lettuce disease (lettuce sclerotiniose). (North Carol. Agric. Exp, 

 Stat. Bull. No. 217 [1911J, p. 7—21.) 



Stewart, F. C. Some diseases of apples and pears in 1910. (West. N. Y. 



Hort. Soc. Proc. LVI [1911], p. 61—65.) 

 Stewart, J. P. Lime-sulphur on peaches, and in summer control of scale on 



apples. (Pennsylvania Stat. Rpt. [1910], p. 268.) 

 Stift, A. tJber im Jahre 1911 veroffentlichte, bemerkenswerte Arbeiten und 



Mitteilungen auf dem Gebiete der Zuckerruben- und Kartoffelkrankheiten. 



(Centralblatt f. Bakt. usw. IL Abt. XXXIII [1912]. p. 447-496.) 

 y Stormer, K. Richtlinien zur naturlichen Bekampfung von Pflanzenkrankheiten 



(Sitzungsber. und Abhandl. Kgl. Sachs. Ges. Bot. und Gartenbau Dresden XV 



[1911], p. 65—76, 1 Fig.) 

 Stone, G. E. Crown Gall. (XXIII Annual Report of the Agric. Exp. Stat. 



Massachusetts 1910 [1911], p. 20—23.) 



— The Chestnut Disease (Diaporthe parasitica). - (Ibidem p. 24—25.) 



— Shade Tree Troubles. (Ibidem p. 26—29.) 



— The Spraying of Trees. (Ibidem p. 30-34.) 



— Fusarium Disease of Cucumbers and other Plants. (XXIII Annual. Report 

 of the Agric. Exp. Stat. Massachusetts 1910 [1911], p. 16—19. pt. 2, p. 62—65.) 



— An Outbreak of Rusts. (XXIII Annual. Report of the Massachusetts Agric. 



Experim. Stat. 1910 [1911], p. 8.) 



— Crown gall. (Massachusetts Stat. Rept. [1910], pt. 2, p. 58-61.) 



— The spraying of trees. (Massachusetts Stat. Rept. 1910, pt. 2, p. 47—51.) 



— A new type of spray nozzle. (Ibidem p. 69—71, Fig, 1.) 

 Tachon. La defense contre la grele par le paratonnerre paragrele. (Rev. de 



viticult. XVIII [1911], p. 603—604, 634—638.) 



