No. 2, December, 1921] PATHOLOGY 103 



PATHOLOGY 



G. H. Coons, Editor 

 C. W. Bennett, Assistant Editor 



(See also in this issue Entries 384, 397, 412, 414, 425, 438, 439, 444, 452, 509, 553, 575, 621, 



764, 782, 783, 785, 786, 787, 788, 789, 848) 



PLANT DISEASE SURVEY (REPORTS OF DISEASE OCCURRENCE AND SEVERITY) 



657. Werth, E. Phanalogie und Pflanzenschutz. [Phenology and plant protection.] 

 Zeitschr. Pflanzenkrankh. 31 : Sl-89. 1921. — This is a discussion of the organization of a plant 

 pathological service based upon the relationship between plant diseases and weather. — 

 H. T. Giissow. 



THE HOST (RESISTANCE; SUSCEPTIBILITY; MORBID ANATOMY AND 



PHYSIOLOGY) 



658. Chifflot, J. Communications ecrites. [Written communications.] Bull. Soc. 

 Path. V(5g. France 8: 34-35. 1921. — It is reported that seeds of hollyhock taken from plants 

 badly infected with Puccinia malvacearum were immersed in copper sulphate solution, 2 grams 

 to 1 1 . of water, for \ hour ; plants grown from these seeds were entirely free from the rust. This 

 is given as evidence that the hollyhock may be grown without injury from the disease and also 

 as contradicting the mycoplasm theory. — C. L. Shear. 



659. DucoMET, Vital. Sur le Septoria antirrhini Desm. [Regarding Septoria antirrhini.] 

 Bull. Soc. Path. V^g. France 8: 33. 1921. — This fungus is reported as a weak parasite on snap- 

 dragon (mufiier), especially on plants in somewhat abnormal condition, as during the past 

 season, which followed a very mild winter and resulted in the plants assuming a somewhat 

 biennial character with weakened shoots and foliage.— C L. Shear. 



660. FoEX, Et. Les relations entre la leptonecrosse et I'enroulement. [The relations 

 between leptonecrosis and leaf roll.] Bull. Soc. Path. Veg. France 8: 24-28. 1921. — A r6sum6 

 is presented of Quanjer's observations on the potato diseases in France. A table is given 

 showing the coordination between phloem necrosis and leaf roll as determined by Quanjer 

 from the examination of stems from plants not seen by him. The few doubtful cases of iden- 

 tification are considered due to the disease not having developed sufficiently to show leaf-roll 

 symptoms. In 2 other cases true leaf-roll symptoms were probably not present. In reference 

 to the accumulation of starch in plants not yet showing phloem necrosis, the author concludes 

 that this tends to prove that it is not necessary that the vessels be obstructed in order to stop 

 the transportation of carbohydrates. — C. L. Shear. 



661. MoRETTiNi, Alessandro. Aumento della resistenza alia carie del frumento Noe 

 mediante selezione. [Selection as a means of increasing the resistance of wheat (var. Noe) 

 to stinking smut.] Staz. Sper. Agrarie Ital. 53: 399-413. 1920. — In experiments on resistance 

 and susceptibility of wheat to Tilletia tritici, the author used the following methods: Mass 

 selection in the first few years of investigation followed by pure line selection in later years. 

 The variety (Noe) used was extremely susceptible. Infection of seeds was accomplished by 

 moistening them with 1 per cent gum-arabic solutions and thorough dusting with spores. The 

 results of the last 3 years of selection were as follows: 



