344 EXPERIMENT STATION RECORD. [Vol.40 



No. 3, pp. 87-97).— In a paper presented at the meeting of the Phytopathological 

 Seminary at Washington, D. C, the author calls attention to some phases of 

 plant disease problems that are considered as needing investigation, Thi 

 relate especially to studies in plant hygiene and of crops in relation to their 

 environment. 



Pathological aspects of the Federal Fruit and Vegetable Inspection Serv- 

 ice, C. L. Shear (Phytopathology, 8 (1918), No. k- PP- 155-160).— Attention 

 is called to some of the pathological problems, and the possibilities of service 

 offered by and in connection with the recently established Food Inspection 

 Service of the Bureau of Markets of the U. S. Department of Agriculture. 



Immunity and disease in plants. B. J. Butler (Agr. Jour. India, Indian 

 Sci. Cong. No., 1918, pp. 10-28). — The author distinguishes between avoidance, 

 endurance, and resistance of disease by plants, and cites freely the Illustrative 

 literature, with discussion, Indicating certain directions In which progress can 

 be readily made by investigations. 



Breeding for disease resistance in plants, YV. A I teTOH (Amer. Jour. Hot.. .', 

 (1918), Wo. 6, pp. 279-283). — Besides giving a discussion of several plant dis- 

 .is to introduction, spread, injury, and prevention, the last being based 

 primarily upon the development of resistant varieties by work along lines fol- 

 lowed in the past as here reviewed, the author si: I measures in- 

 volving cooperation <>n a large scale. 



Plant disease investigations (Kama* Sta. R]>t. 1917, pp. SO, SI). — It Is 

 Stated that marked freedom from stem rust (Pucoinia graminis tritict) v 

 observed in field and greenhouse tests with three varieties of hard winter 

 wheat developed by the station. One of these, Kanred, showed only 10 per 

 cent of rust and two commercial varieties only r> per cent Ml other varieties 

 which proved susceptible in the same te8t showed :is much as B5 per cent i 

 i the quality of the seed was very poor. 



An investigation on the control of corn smut showed that the various fungi- 

 cides used reduced the amount of smut, but in almost every .. ■ yield was 

 likewise reduced. It has been found that infection from corn smut is local 

 and that that through developing seedlings is a negligible factor. 



Brief notes are given on the occurrence of a number of other <> real dia I 

 as well as on di "f potatoes and tomab 



Report on the plant disease situation in Guam, W. EL WKSTON, tk. (Qltom 

 Sta. Kpt. 1917, }>]>. -',5-02. pU, 2). — An account is given of fungus diseases ob- 

 served by the author during a brief visit to the island of Guam in 1918, I 

 diseases being discussed under the various host plants. 



Cultures of JEcidium tubulosum and M. passifloriicola. 11. B. THOM \s 

 (Phytopathology, 8 (1918), X". -J. pp. 16S, /<>.}).— As a result of cultural te^ts. 

 the author has been able to associate the telial forms of these fungi with their 

 alternate hosts. This is believed to be the first time that cultural proof has 

 been presented of the full life cycle of any tropical grass or sedge rust. 



Field studies of Cercospora beticola, M. B. McKay and Ytxrs YV. Pool 

 (Phytopathology, 8 (1918), No. 3, pp. 119-136, flgs. 2).— Results are given of 

 studies on artificial infections, sources of tield infection, and the influence of 

 different held and feeding practices on the development of the leaf spot of 

 sugar beeis due to C. beticola, 



in addition to the sugar beet, garden beets. Swiss chard, mangel-wureel, and 

 Martynia lotiisiami are subject to attack by this fungus. It is claimed that 

 primary infections on sugar beets may com.- from infected beet balls or from 

 the debris of other hosts than the sugar beet, hut the chief source of such in- 

 fections is from the old beet top material left en the ground after the hai\ 

 of the preceding season. 



