254 EXPERIMENT STATION RECOED. 



and the common anthrucnose {('o//t4(>tric/iinj/ Ingenarluin). The first 

 disease appeared earlier than before, and spraying experiments for its 

 prevention were too late to be of value. In the case of the anthrac- 

 nose, applications of Bordeaux mixture begun July 1 or earlier will 

 prevent injury. The maple-leaf blight {^PhijIhMlcta acerlcola), is 

 briefly described. This disease produces large dead spots in the 

 leaves, which become curled and distorted, losing their beauty; but 

 beyond this the actual injury to the tree is considered in most cases 

 slight. 



The chrysanthemum rust, which was first reported in 1807 (E. S. R., 

 10, p. 648), appears to be on the decline. It has appeared in numerous 

 places, but apparently caused little or no damage. 



Experiments are reported on growing violets in sterilized soil, the 

 purpose of which Avas to determine the relation between the produc- 

 tion of flowers and the occurrence of leaf spots in sterilized and 

 unsterilized soils. The methods of sterilizing the soil were previously 

 given (E. S. R., 10, p. 1055). The plants for the experiments were 

 made from cuttings started in sterilized sand, afterwards transplanted 

 into sterilized soil and removed out of doors, where they remained 

 during the summer. In the fall they were transplanted into a bed 

 divided into 2 sections, one of which was sterilized and the other not. 

 The yield of flowers from both plats is tal)ulated, from which it 

 appears there was a gain of 36 per cent in the number of flowers 

 gathered from the sterilized plat over that from the unsterilized one. 

 The observations made to determine the relative amount of leaf spot 

 on the 2 plats showed that the sterilized plats gave the smallest num- 

 ber, indicating the more vigorous plants were grown on the sterilized 

 soil. The authors state that '" while there is no dou})t as to the bene- 

 ficial results obtained by sterilizing the same soil for 2 or 3 crops, it 

 does not necessarily follow that the soil will repeatedly stand this 

 treatment and give good crops.'" 



Report on various cryptogamic diseases, E. Marchal {Bui. Agr. 

 [^/'^w.sv/.y], 16 {1900), jVo. 1, pp. S-.il, jigs. S). — Brief notes are given 

 on a number of diseases of more oi" less economic importance. Among 

 those described are the white rust of purslane due to Cystopus j)ortu- 

 lacce; rusts of cereals, in which Puccinia graminis is reported on 

 barley, wheat, r3^e, oats, and numerous grasses, P. rnhigo-vera on 

 wheat and barley, and P. coronata on oats as well as on certain pas- 

 ture grasses; the vesicular rust of pine needles caused by Coleosporimn 

 i^enecionh; stem rust of rye caused by Urocystis occulta^ Polyporus 

 on fruit trees, the species mentioned being P. igniarlus, fidvus,' a 

 rust of pine needles caused by Lophodernduin p>)naHtri; a browning 

 of spruce needles caused by L. macrosporum; a blight of shallots due 

 to Scleroti II !<( facl'el !(i)ui • a new Phoma disease of tomatoes, in which 

 serious injury to the fruit is reported in greenhouses; a leaf disease 



