346 EXPERIMENT STATION RECORD. 



Third progress report on Fusarium-resistant cabbage, L. R. Jones (Abs. in 

 Phytopathology, 4 (1914), No. 6, p. 404). — The author reports trials conducted 

 in experimental fields as well as in cooperative tests with farmers of strains 

 of cabbage which were previously reported (E. S. R., 31, p. 446) as resistant 

 to the cabbage yellows fungus. 



Compared with the commercial strains, practically all plants lived and 

 headed, giving a very large increase in production. It is considered justifiable 

 to conclude that the disease-resisting quality which has shown itself in three 

 successive generations is a fixed transmissible character. 



The relation of temperature to the infection of cabbage by Fusarium con- 

 glutinans, J. C. Oilman (Ahs. in. Phytopathology, 4 {1914), No. 6, p. 404)- — 

 In connection with investigations on Fusarium disease of cabbage by Jones 

 (E. S. R., 31, p. 446), the author found that the disease was induced by a soil 

 temperature of from 17 to 22° C. or above, while no disease was found in flats 

 and pots with soil from the same field but kept at 14 to 17°. These experi- 

 ments indicate that the organism is dependent on a rather high soil temperature 

 to produce infection. 



Cotyledon infection of cabbage seedlings by the bacterial black rot, C. 

 Dbechsler (Abs. in Phytopathology, 4 {1914), No. 6, p. 401). — The author 

 reiJorts that cabbage seedlings grown in soil that had been previously inoculated 

 with Pseudomonas campestris were frequently found attacked by black rot. 

 Specialized water pores are not found on cabbage seedlings, and until they are 

 developed on the secondary leaves the cotyledons may function in guttation and 

 bacteria enter through the stomata. The points of original infection are lim- 

 ited to the area active in guttation. The disease was also induced by inoculat- 

 ing droplets extruded by the cotyledons. 



A disease of red clover and alsike clover caused by a new species of Col- 

 letotrichum, P. J. O'Gaea {Abs. in Phytopathology, 4 {1914), No. 6, p. 410). — 

 The author describes a widely sijread disease in the State of Utah on i-ed and 

 alsike clovers. The plants are attacked most frequently at or near the crown, 

 but the fungus may also attack the stems just beneath a cluster of blossoms, as 

 well as the petioles and stipules. A technical description of the fungus, which 

 is a species of Colletotriehum, has been noted (E. S. R., 32, p. S42). 



A disease of the underground steins of Irish potato caused by a new 

 species of Colletotriehum, P. J. O'Gara {Abs. in Phytopathology, 4 {1914), No. 

 G, pp. 410, 411)- — ^According to the author, a disease of potatoes which may 

 become of economic importance was observed in the Salt Lake Valley, Utah. 

 While examining some badly diseased fields many plants were found to have 

 dark brown or black cankers or lesions on the underground stems, the stems 

 often being completely girdled. The organism causing the trouble has been 

 isolated and a technical description of it is given elsewhere (E. S. R., 32, p. 842). 



"Spindling sprout" of potatoes, F. H. Hall {New York State Sta. Bui. 399, 

 popular ed. {1915), pp. 4, fiS- 1)- — ^This is a popular edition of Bulletin 399 

 previously noted (E. S. R., 33, p. 52). 



A contribution to the life history of Spongospora subterranea, L. O. 

 Ktjnkel {U. 8. Dept. Agr., Jour. Agr. Research, 4 {1915), No. S, pp. 265-218, 

 pis. 5). — In a preliminary report the author describes a type of infection sup- 

 posed not to have been noted heretofore. 



Infection of growing potatoes by S. subterranea is accomplished not by sepa- 

 rate amoebre, as previously supposed, but through the action of an invading 

 Plasmodium infecting a large number of cells at each point of entrance. This 

 raises numerous questions regarding various related organisms. 



It is noted that the cells in each little area of infected tissue are stimulated 

 to abnormal growth and division. In stored tubers siiores germinate in the base 



