41 6 SPECIAL PLANT PATHOLOGY 



Crown-gall (Pscitdomonas tumefaciens, E. F. Sm. & Towns). 



U. S. Dept. Agr. Bur. Plant Industry, Bull. i86, p. 13 (1910). 



Hairy-root, Ibid., p. 14. 

 Fly-speck {Leptothyrium pomi (Mont. & Fr.), Sacc). 



Ohio x\gr. Exp. Sta., Bull. 79, p. 133 (1897). 

 Frost-blister (N on- par.). 



N. Y. Agr. Exp. Sta., Bull. 220 (1902). 

 Frog-eye Spot {PhyUosticta pirina Sacc.) 



Va. Rep., pp. 95-115, figs. 16 (1911-12). 

 Fruit-pit {Non-par.). 



Bull., Torr. Bot. Club, Vol. XXXV, p. 430 (1908). 

 i Phyllachora pomigena (Sch-w.), SsLCC. 

 Fruit-spot {Phonia pomi, Pass. (Phytopath., Vol. II, pp. 63-72). 

 [Sphceropsis malorum, Pk. 



Bull. 121, U. S. Bureau PI. Indst. 

 Leaf -spot (Frog-eye) {PhyUosticta pirina, Sacc). 



R. I. Agr. Exp. Sta., Rep. 7, pp. 188-192 (1895). 

 Pink-rot {Cephalothecium roseum, Cda.). 



N. Y. Agr. E.xp. Sta., Bull. 227 (1902). 

 Powdery Mildew {Podosphcera leucotricha (Ell. & Ev.) Salm. and P. oxyacantlicp {DC.) 

 deBy.). 



U. S. Dept. Agr., Bull. 120 (1914). 

 Ripe-rot {Glcosporium fructigenum, Berk). 



Journ. Mycol., Vol. VI, pp. 164, 172 (1891). 

 Root-rot {Armillaria mcllea Vahl). 



Oregon State Biennial Report, pp. 226-233 (1911-12). 

 Scab {Venturia inaequalis (Cke.), Wint.). 



N. Y. (CorneU) Agr. Exp. Sta., Bull. 335 (1913). 



Mont. Bull. 96, pp. 65-102, pi. I, figs. 3 (February, 1914). 

 Scab {Fusicladimn dendriticiim (Wallr.) Fckl.) 



Wash. Bull. 64, pp. 24, pis. 2, figs. 5 (1904). 

 Rusts {GymtiosporangimnJHniperi.virginiancB Schw. {Rmstelia pi rata (Schw.), Thaxt.); 



G. globosum, Farl. {Ra'stclia laccrata, y, z. Thaxt.). 

 Scald {Non-par.). 



Vt. Agr. Exp. Sta., Rep. 10, p. 55 (1897). 

 Scurf {PhyUosticta prunicola (Opiz), Sacc). 



Stevens & Hall, Disease of Economic Plants, p. 78 (191 1). 

 Silver-leaf {Stercum purpureum, Pers.). 



Phytopathology i, p. 177 (1911). 

 Sooty-blotch {Leptothyrium pomi (Mont. & Fr.), Sacc). 



Duggar, Fungous Diseases of Plants, p. 367 (1909). 

 Spongy Dry-rot {VolutcUa friicti, Stev. & Hall). 



Duggar, Fungous Diseases of Plants, p. 316 (1909). 

 Spray Injury {N on- par.). 



Bordeaux injury, N. Y. Agr. Exp. Sta., Bull, 287 (1907). 



Lime-sulphur injury, Ore. Agr. Exp. Sta., Research Bull. 2 (1913). 



