19171 DISEASES OF PLATTTS. 453 



A Gloeosporimn disease of the almond probably new to America, Helen L. 

 CzABNECKi {Abs. in Phytopathology, 6 (1916), No. S, p. SIO). — An account is 

 given of a disease of almonds which is considered identical with that occurring 

 In Italy caused by O. amygdalinum. 



The hard rot disease of gladiolus, L. M. Masset {New York Cornell Sta. 

 Bui. S80 {1916), pp. 151-181, pis. 2, figs. 7; abs. in Phytopathology, 6 {1916), 

 No. 1, p. 101). — The author describes a hard rot disease of gladiolus which is 

 due to Septoria gladioli. The trouble affects both the leaves and the corras, 

 causing considerable loss. The symptoms and etiology of the disease are de- 

 scribed, together with the results of experiments on control. SoU treatments 

 with chemicals are said to have given results of little practical value. The 

 fungus has been foimd able to live over the winter on dead tops lying upon 

 the ground, and it is suggested that these should be raked up in the fall and 

 burned. It has also been found that the fungus lives for at least four years 

 in the soil, and on this account crop rotation should be practiced for the elimi- 

 nation of the organism. 



Eed leaf spot of BLippeastrum, P. I. Dougheety {Abs. in Phytopathology, 

 6 {1916), No. 3, p. S09). — In connection with the occurrence of conspicuous red 

 spots on Hippeastrum, the author has Isolated a fungus of a Phyllosticta type, 

 and inoculations from single spore cultures have been successful in producing 

 the disease. 



Notes on oleander bacteriosis, C. O. SMrrn {Abs. in Phytopathology, 6 

 {1916), No. S, p. SOS). — The bacteriosis of oleander is said to be occasionally 

 found in California on nursery stock, the organism causing galls on the stems, 

 leaves, and inflorescences. From studies thus far made, certain differences are 

 said to have been recognized between the oleander organism and the two other 

 gall-producing organisms. Bacterium savastanai and B. tumefaciens. The ole- 

 ander organism has given negative results in inoculations of plants susceptible 

 to the crown gall organism, and the olive knot organism has also given nega- 

 tive results when inoculated upon the oleander. 



Spraying experiments to prevent rose leaf blotch (Ann. Rpt. Ontario Agr. 

 Col. and Expt. Farm, 41 {1915), p. 11). — As a result of experiments, it is 

 claimed that the rose leaf blotch, due to Actinonema rosm, may be prevented 

 by repeated spraying with lime sulphur beginning before the buds open in the 

 spring and repeating at intervals of ten days throughout the growing season, 

 except when the roses are in bloom. This treatment is said to be more efficient 

 than Bordeaux mixture for the control of this trouble. 



Forest botany, R. S. Hole {Ann. Rpt. Bd. Sci. Advice India, 1914-15, pp. 

 98-103). — It is stated that the most important factors in the failure of sal 

 {Shorea robusta) to reproduce itself may in the main be summed up as bad 

 soil aeration and drought. Somewhat detailed discussion regarding these is 

 given, with such remedial measures as a well aerated seed bed free from raw 

 humus, full overhead illumination, and light side shade to prevent frost injury 

 and retain moisture. 



It is said that the spread of Trametes pini in stands of Pinus excelsa is 

 effected chiefly by means of wind-borne spores entering through wounds in the 

 stem, and that lopping should be prohibited. 



A list is given of botanical and phytopathological publications. 



Fungus diseases of trees, R. B. Maxwell {Amer. Forestry, 22 {1916), No. 

 261, pp. 161-163, tgs. 4)- — Discussion of a general character is given of some 

 fungus tree diseases, classed according to incidence on the leaves, on the stem 

 and branches, and on roots, with suggestions in regard to their control. 



A fertile witches' broom on larch, P. Jaccabd {Schweiz. Ztschr. Forstw., 66 

 {1915), No. 1-8, pp. 139-145, pi, 1). — Reporting observations on the <±aracter 



