1154 EXPERIMENT STATION EECOED. 



From the reports that have been received and the author's observations, 

 trees and orchards affected by the aerial form of this disease need not be cut 

 out, as there appears to be no spread of- the disease and in many cases the 

 trees bear profitable crops. If, however, the trees are not doing well as com 

 pared with healthy trees, they should be removed. 



Glceosporium disease of currants, H. T. Gussow (Gard. Chron., 3. ser,, Jfi 

 (1907), No. lOSO, J). 180, fig. 1). — A description is ttiven of an injury to black 

 currants which is attributed to attacks of Glceosporium curvatum. This fungus 

 had been considered distinct from G. ribis, occurring on the gooseberry and red 

 and white currant, but the author thinks from the evidence at hand that they 

 will probably prove identical. 



Attention is called to investigations of H. Klebahn (E. S. R., 18, p. 347) in 

 which he showed that G. ribis is a form of Psendopeziza, to which the name 

 P. ribis is applied. 



For the prevention of the attack of this fungus on currants thorough spray- 

 ing with Bordeaux mixture is reconuiiended. 



The spread of the chestnut disease, \V. A. Murrill (Jour. X. Y. Bot. Gard., 

 9 (1908), No. 98, pp. 23-30, figs. 5).— The chestnut disease, previously de- 

 scribed (E. S. It., 19, p. 250), is said to have continued its spread about New 

 York City and elsewhere, the pruning of diseased branches having entirely 

 failed to check it, even in the case of very young trees. 



()l)servations on the Japanese chestnut tree as well as on the chinquapin 

 {Castanea pumila) show that these species as well as the common chestnut 

 (C. deritata) are sul).iect to the attack of this fungus. In the i)resent condition 

 of information regarding this disease, the author does not consider it safe to 

 put out chestnut plantations at any point within the known area of distribution 

 of this fungus. Those made elsewhere should be started from seed and care- 

 fully guarded. 



The chrysanthemum ray blight, F. L. Stevens (North Carolina Sta. Rpf. 

 1901. pp. J.J-.'/7, figs. 11). — A detailed description is presented of a disease of 

 chrysanthemums to which the name ray blight is given. This disease has been 

 known for several years, and a previous account has already been given 

 (E. S. R., 19, p. 658). The symptoms of the disease, the character of the 

 fungus (Ascochyta chrysanthcmi), its action in cultures, and the results of 

 inoculation experiments are described in detail. 



Prepared Bordeaux mixture, C. D. Woods and H. H. Hanson (Maine Sta. 

 Bui. 15), pp. 119-12 'i, dgm. 1). — A comparative trial was made of 5 dry prep- 

 arations and 4 wet forms of Bordeaux mixture, all offered under trade names, 

 with the result that the ready-prepared P.ordeaux mixtures proved about as 

 effective as freshly made Bordeaux, i)rovided they were used in such amounts 

 as to supply an equal amount of copper. None of the substitutes for wet 

 Bordeaux mixture approached in any way the efficiency of the wet preparations 

 for preventing the late blight. It is believed that the wet ready-to-use Bor- 

 deaux mixtures can not be depended upon to prevent blight unless used in 

 quantities much larger than the directions call for, and that the dry Bordeaux 

 mixtures are not nearly so effective as the wet ones. 



Self-boiled lime-sulphur mixture as a promising fungicide, W. M. Scott 

 (C7. S. Dept. Agr., Bur. Plant Indus. Circ. 1, pp. 18, figs. 2). — On account of 

 the corrosive action of Bordeaux mixture, particularly when used during wet 

 seasons, experiments have been carried on to discover a substitute as a fungi- 

 cide. The author has experimented with a mixture of sulphur and lime and 

 finds that it is quite efficient for the control of the ordinary leaf and fruit 

 diseases of the apple and peach. 



