54 EXPEKIMENT STATION EECOED. 



fully grown and seem to be resistant to blight, and their use is recommended 

 in combating this disease. In addition the author suggests the top-working 

 of blight resistant trees on the stocks mentioned above, on Kieffer, or on some 

 other varieties which are superior to Kieffer, as a means for combating this 

 trouble, which is exceedingly destructive in the orchards of the Pacific coast. 



Plum diseases, E. Rabate (Min. Agr. [France], Ann. Serv. Epiphyties, 1 

 {1912), pp. 177-185, figs. 6). — This includes a discussion of some insect enemies 

 found on plum trees, also of plum leaf rust {Puccinia pruni). plum rot (Monilia 

 cinerea), and some degenerative changes in portions of the trees affected, with 

 suggestions regarding possible control. 



A parasitic disease of quinces, H. Blin (Rev. Hort. IParis'], 86 (1914), No. 

 8, pp. 182, 183). — A description is given of a disease of quinces first observed in 

 France in 1913, and which has since been found in a number of localities. 



The trouble is said to be due to Monilia fnictigena, which attacks the leaves 

 and young fruits. The fruits are mummified, and it is suggested that for the 

 control of the disease all fallen leaves and mummy fruits be collected and 

 burned and the plants sprayed with Bordeaux mixture. 



Experimental spraying for blackberry anthracnose, H, L. Rees (Washing- 

 ton Sta., West. Wash. Sta. Mo. Bui., 2 (WUf), No. 6, jyp. 2-12, figs. 5).— A pre- 

 liminary report is given of spraying experiments in three fields for the control 

 of the blackberry anthracnose. 



This disease is said to be supposedly troublesome in western Washington and 

 it is considered that it is probably caused by the same fungus as that occurring 

 on the blackberry in the East (Glccosporium venetum), although this has not 

 been demonstrated. The disease differs in some respects in that the principal 

 damage caused by the fungus in western Washington is on the berries. The 

 girdling and killing of the canes, which is a prominent symptom of anthracnose 

 in the East, is said not to occur in Washington, but the fruiting stems are 

 girdled and killed, causing considerable loss. 



In 1913 experiments for the control of the disease were carried on in which 

 it appeared that Bordeaux mixture, lime sulphur, and Burgundy mixture gave 

 the best results. Cutting out canes as soon as the fruit is picked will also 

 lessen the amount of disease. The author considers it doubtful whether fall 

 spraying is advantageous. Spraying during the growing season will reduce 

 the amount of loss, and it is considered that the most effective time for spray- 

 ing is immediately after the petals have fallen. 



Mulberry diseases, G. Arnaxjd (Min. Agr. [France], Ann. Serv. Epiphyties, 

 1 (1912), pp. 220-227, figs. .3).— This contains a brief description of the stages 

 of Nectria cinnaharina on mulberry, with recommendations regarding the con- 

 trol of the fungus, including selection of stock, use of sprays in early spring, and 

 removal of portions showing attack. A second disease is also described, due to 

 a fungus, producing a discoloration in the spring wood which it invades. 



A study of chlorosis in grape stocks, P. Marsais (Min. Agr. [France], Ann. 

 Serv. Epiphyties, 1 (1912), pp. 413-420). — ^This is an account of a series of 

 experiments on the development by crossing of vines resistant to phylloxex'a 

 and at the same time commercially successful in the calcareous soils, which 

 in these districts tend to produce chloi'osis in stocks of foreign origin. The 

 results obtained are thought to justify the hope that in spite of the climatic, 

 soil, and biological obstacles existing in this region, particularly those pre- 

 sented to foreign stock, the problem of continuing profitable grape culture in 

 this region may be regarded as capable of solution by employment of hybrids 

 named as having been found best adapted to the conditions there existing. 



