78 PATHOLOGY [Box. Absts., Vol. VIII, 



542. McCuBBiN, W. A. A heart rot of peach. [Abstract.] Phytopath. 10: 65. 1920. 



543. MoEKis, R. T. Hazel nuts. Amer. Nut Jour. 12: 57. 1920.— The fungus Crypto- 

 sporella anomata (Sacc.) appears to be the only factor preventing the successful introduction 

 of foreign hazels into the U. S. A., though other enemies are also present. A depressed area 

 in the bark with a swollen overhang of healthy bark around the margins characterizes infec- 

 tions by hazel blight. Effective control is possible by removing diseased tissues and spraying 

 with Bordeaux mixture. — E. L. Overholser. 



544. Neal, David C. Phony peaches: A disease occurring in middle Georgia. Phyto- 

 path. 10: 10&-109. 1 pi., 1 fig. 1920. — A disease of peach at present restricted to the peach 

 belt of middle Georgia, U. S. A., and frequently confused with "collar edema," is here de- 

 scribed under the name common among growers. The disease is characterized by vivid green 

 leaves which are larger than normal and hang on short, stubby branches. "As a result, the 

 entire head of the tree is reduced to a rather compact shape, owing to the foreshortened inter- 

 nodes and resulting close spacing of the leaves." The amount of fruit set is small, low in qual- 

 ity, and late in ripening. All varieties have been found affected. The disease, the etiology of 

 which is not discussed, has been found on 6-year-old seedlings. — G. H. Coons. 



545. Orton, W. a. Streak disease of potato. Phytopath. 10: 97-100. 1 pL, 1 fig. 1920. 

 — Streak first appears on upper full grown leaves as elongated or angular spots which follow 

 the veinlets and extend into the parenchyma. Longitudinal streaks soon appear on the 

 petiole, which soon collapses; the hanging dead leaves are characteristic. Following this the 

 stem turns brown and dies, beginning at a point below the tip. Tubers are not affected except 

 as the period of growth is shortened. There is discoloration in cortex. Varieties Factor 

 (European), Rural New Yorker, and many hybrid seedlings are susceptible. American 

 varieties are more resistant than are European. Attempts to isolate a pathogenic organism 

 from lesions have failed. The disease is not to be confused with advanced stages of leaf-roll 

 or mosaic. It has been seen in northern U. S. A. from coast to coast but has not become 

 more prevalent in 7 years. — Donald Reddick. 



546. Reddy, C. S., and W. E. Brentzel. Flax canker, a non-parasitic disease. [Ab- 

 stract.] Phytopath. 10: 6&-67. 1920. 



547. Rosenbaum, Joseph. A stem disease of tomato caused by Macrosporium solani E. 

 and M. [Abstract.] Phytopath. 10: 59. 1920. 



548. Spencer, E. R. Black crust of Brazil nuts. [Abstract.] Phytopath. 10: 61. 1920. 



549. Stover, W. G. Some results of corn root rot work in Ohio. [Abstract.] Phytopath. 

 10: 55. 1920. 



550. Wang, K. W. [Some cotton diseases.] Khu-Shou [Science-Publ. Chinese Sci. Soc] 5: 

 1057-1062. 1920. — Diseases of cotton reviewed as to their causes and symptoms are yellow leaf 

 blight {Macrosporium nigricantium) , leaf spot, shedding of bolls, angular leaf spot {Bacterium 

 malvacearum) , wilt {Fusariumvasinjectum), damping-off {Rhizoctonia sp.) , anthracnose {Glom- 

 erella gossypii), root rot {Ozonium omnivorum) , leaf blight {Mycosphaerella gossypina), areo- 

 late mildev/ of cotton {Ramularia areola), boll rot {Bacterium sp.), and root knot {Heterodera 

 radicicola) . A list of literature cited is also appended. — Chunjen C. Chen. 



551. Wiltshire, S. P. A dieback of red currants. Ann. Rept. Agric. and Hort. Res. Sta. 

 Univ. Bristol 1919: 30-33. 1919. — Branches of red currant suddenly wilt and die. This may 

 happen at any time but is most noticeable in July. Cortex and wood of affected plant are 

 infested with mycelium. Cytosporina ribis and Nectria cinnabarina have been isolated in 

 culture and both are under test. — D. Reddick. 



