436 BOTANICAL GAZETTE [JUNE 
a leaf-spot of the bean and cow pea due to Phyllosticta phaseolina. Brief descrip- 
tions are given in each case of the fungus itself and its behavior in pure cultures 
and inoculation experiments. No experiments in the treatment of these diseases 
are reported. The paper should be of interest to mycologists.—E. MEAD WILCOX. 
~Rotrs?9 has published his second contribution to the knowledge of a potato 
disease, called the rosette by SELBy,3° due to the sterile fungus Rhizoctonia. 
The author has conducted extensive experiments both in the treatment of the 
disease and in the study of the life history of the fungus. He finds that the cor- 
ticium or fruiting stage of the fungus develops freely upon the living stems of 
the diseased plants, but considers the sclerotial bodies which are common on both 
stems and tubers the most important agents in the distribution of the fungus. 
Formalin treatment of the tubers to be planted improved the appearance of the 
crop but reduced the yield. The corrosive sublimate solution treatment gave 
good returns when the land employed for the crop was new. Liming the soil 
and treating the ‘‘seed” tubers with sulfur gave negative results. The following 
recommendations are also made: (1) clean tubers should be carefully selected 
from healthy tubers for planting, (2) all vines and stems of weeds should be gath- 
ered and burned at the end of the season, (3) care must be taken to see that the 
fertility of the soil is maintained, that through proper methods of cultivation the 
soil is well aérated, and that where irrigation is employed the water is applied 
to the land at frequent intervals and in proper amounts, taking care not to allow 
the soil immediately about the forming tubers to become too wet.—E. MEAD 
WILCox. 
29 Rotrs, F. M., Potato failures. A second report. Bull. Col. Exp. Sta. 91. 
Pp. 33- pls. 5. 1904. See Bull. 70 Col. Exp. Sta. for the preliminary report upon this 
subject. 
3° Sze Bulletins 139 and 145 of the Ohio Expériment Station. 
