36 PATHOLOGY [BoT. Absts., Vol. X, 



203. Rand, Frederick V., and Lillian C. Cash. Stewart's disease of corn. Jour. 

 Agric. Res. 21: 263-264. 1921. — Wilt of maize, caused by Aplanobacter stewarti, is widely 

 distributed in the U. S. A. Sweet corn is most affected, and of its varieties the early-maturing 

 ones are most susceptible (up to 100 per cent), the late-maturing ones least so. In tests with 

 45 varieties of field corn, 32 have shown no wilt. A few varieties of dent field corn have shown 

 up to 5 per cent infection, and early-maturing varieties of flint corn are more susceptible than 

 late-maturing ones. — "No evidence whatever of infection from the soil or from proximity to 

 diseased stalks has thus far been obtained." Seed transmission is indicated. Infection of young 

 plants is most likely during the first 2 weeks of growth; high soil moisture at this time results 

 in much infection, the amount under identical moisture conditions being greater at higher 

 temperatures. Heating seed at 60 to 70°C. for 1 hour is a promising method of control. — 

 D. Reddick. 



204. Richards, B. L. The pathogenicity of Corticium vagum as afifected by soil tempera- 

 ture. [Abstract.] Phytopathology 11 : 56. 1921. 



205. Walker, J. C, and L. R. Jones. The relation of soil temperature and other factors 

 to onion smut and infection. [Abstract.] Phytopathology 11: 52-53. 1921. 



206. Weston, W. H. Significant points in the life history of the Philippine maize mildew. 

 [Abstract.] Phytopathology 11: 32. 1921. 



DESCRIPTIVE PLANT PATHOLOGY 



207. Barthe, a. E. La Oficina de Sanidad Vegetal de la Secretaria de Agricultura, 

 Comercio y Trabajo. Resumen de las plagas ya estudiadas y combatidas. [Review of the 

 plagues so far studied and combatted.] Rev. Agric. Com. y Trab, [Cuba] 3: 290-296. 15 fig. 

 1920. — An account is given of bud rot of coconut which is said to have reduced exportation 

 of coconuts by a third in 15 years. For control various sanitary measures are recommended 

 together with the spraying of new plantations in afi'ected areas with a mixture of Bordeaux 

 and Paris green. The Panama disease of plantains is found through Cuba except in the Orient 

 province. Afi'ected plants nearing maturity develop yellow leaves which soon fall, the raceme 

 develops poorly, and a cross section of the trunk shows yellow, red, or black spots. Burning 

 of diseased plants, sterilizing tools, and a rotation are recommended. Sugar cane mosaic 

 is also discussed. — F. M. Blodgett. 



208. Beach, W. S, A Phytophthora crown rot of rhubarb. [Abstract.] Phytopathology 

 ll:5&-56. 1921. 



209. Birmingham, W. A. Ergot. Agric. Gaz. New South Wales 32: 410-412. 8 fig. 

 1921, — A popular description of the disease and methods of control are presented. — L. R, 

 Waldron. 



210. BiSBY, G. R. Sclerotinia disease of sunflower in Manitoba. [Abstract.] Phytopath- 

 ology 11: 49. 1921. 



211. CooNs, G. H., and Rat Nelson. Celery yellows. [Abstract.] Phytopathology 

 11:54-55. 1921. 



212. Elliott, John A. A new Phoma disease of cotton. [Abstract.] Phytopathology 

 11:48. 1921. 



213. Oilman, J. C. A Fusarium wilt of corn in Iowa in 1920. [Abstract.] Phytopath- 

 ology 11: 33. 1921. 



214. Gloter, W. O. Blister canker of apple and its control. New York Agric. Exp. Sta. 

 [Geneva] Bull. 485. 71 p., 15 pi. 1921. — Data are presented which establish the pathogen- 

 icity of N u7nTnularia discreta (Schw.) Tul. as the causal agent of lesions occurring on the trunks 



