248 EXPERIMENT STATION RECORD. [Vol.36 



With formaldehyde, copper sulphate solution, and hot water gave control only 

 in the case of hot water. 



A newly noted Phyllosticta on alfalfa in America, and its ascigerous 

 stage, F. R. Jones {Abs. in Phytopathology, 6 (1916), No. 1, pp. 102, 103).— A 

 yellow leaf blotch disease of alfalfa is reported to have been under observa- 

 tion for the past two years in Wisconsin, and to have been noted in Indiana, 

 Illinois, Minnesota, South Dakota, and Iowa. The blotches are said to elon- 

 gate in the direction of the veins and to become deeper in color on the older 

 leaves. They are constantly infected with a fungus which appears to be P. 

 medicagmis, and during the autumn apothecia were found which indicated 

 that the Phyllosticta is the conidial stage of Pyrenopeziza medicaginis. 



Some root diseases of the bean, W. H. Btjkkholder {Abs. in Phytopathology, 

 6 (1916), No. 1, p. 104)- — While engaged in an investigation of a disease of the 

 bean in western New York, the author observed a number of fungi causing 

 more or less trouble. Among those causing serious injury were Fusarium sp., 

 Thielavia basicola, and in a number of cases Rhizoctonia sp. Inoculation 

 experiments with the Fusarium upon crops grown in rotation with beans gave 

 negative results. Peas, red clover, alsike clover, and alfalfa proved sus- 

 ceptible to T. basicola. The species of Fusarium appears to be distinct from 

 any that has previously been reported on the bean. 



Cabbage yellows and the relation of temperature to its occurrence, J. C. 

 Oilman (Ann. Missouri Bot. Gard., 3 (1916), No. 1, pp. 25-8^, pis. 2, figs. 21).— 

 The author concludes his report on the study of Fusarium conglutinans, the 

 cause of the wilt disease called cabbage yellows, by stating that the fungus, a 

 facultative parasite living in the soil, becomes destructive to cabbage under 

 certain conditions, showing a somewhat high optimum temperature and a high 

 resistance to drying both in pure culture and in the soil. Inoculation with this 

 fungus produced the disease in a large percentage of the trials, and inocula- 

 tions from diseased plants reproduced the disease, control plants remaining 

 free from j'ellows. Failure of careful inoculation experiments is attributed to 

 variations in virulence. Low temperatures (12 to 16° C. or 53.6 to 60.8° F.) 

 prevented the development of the disease, which is favored by temperatures of 

 17 to 22" C. 



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

 in Phytopathology, 6 (1916), No. 1, p. 102). — In continuation of reports on the 

 production of seed of disease-resistant cabbage (E. S. R., 33, p. 346), the author 

 describes a selection of Brunswick which, on sick soil, gave only 18 per cent 

 of yellows as compared with 84 per cent from commercial seed. The resistant 

 strain produced 95 per cent of heads, while the commercial controls yielded 

 only 76.1 per cent of heads. 



Relation between storm and disease, August and September, 1915, in 

 Texas, F. H. Blodgett (Abs. in Phytopathology, 6 (1916), No. 1, pp. 100, 101). — 

 The author reports severe infections of anthracnose and bacterial spot of cotton 

 following the storm that prevailed from August 16 to 19, 1915, in Texas. The 

 area of greatest damage due to disease was located in the area of greatest 

 storm activity, and was practically bounded by a line denoting 2 in. of rainfall 

 during 24 hours of the storm. 



Cucumber diseases in the Middle West, W. W. Gilbert (Abs. in Phyto- 

 pathology, 6 (1916), No. 1, pp. 104, 105). — In connection with an investigation 

 of cucumber diseases undertaken in cooperation with the experiment stations 

 in Indiana, Wisconsin, and Michigan, the author reports observations on a 

 number of these diseases which are more or less widely distributed. Among 

 them are the cucumber mosaic disease, or white pickle; scab, due to Clado- 

 sporium cucumcrinum; anthracnose, due to Collctotrichum lagenarium ; wilt 



