DISEASES OF PLANTS. 347 



The characteristics of the disease are pointed out, and the author recom- 

 mends early spraying with a 3 per cent solution of Bordeaux mixture, the cut- 

 ting out and burning of all diseased plants, and the use of lime in the soil and 

 scattered about the stems. 



Experiments on the control of gooseberry mildew, A. Vasilev {Zhur. 

 BoJyczni Rast., 1 {1007), No. 3-.'/, irp. 103-105. German Summanj. pp. XIX, 

 XX).— A brief account is given of the successful use of potassium sulphate for 

 the control of the gooseberry mildew {SpJuvrotheca mors-uvw). 



Fruit tree diseases and fungicides, F. M. Rolfs {Missouri Fruit Sta. Bui. 

 16, pp. 3-39). — An account is given of various fungus diseases which are com- 

 mon to cultivated fruits in the Ozark region of Missouri together with direc- 

 tions for most efficiently and economically combating them. The diseases are 

 grouped according to the host plants, and a bibliography is given of some of 

 the more important station and Departmental publications relating to them. 

 While most of the remedies suggested consist of spraying with fungicides, at- 

 tention is called to the fact that spraying is merely preventive, and that in 

 order to be effective it must be thoroughly done. 



Notes on a cherry disease in Western Germany, R. Ewert (Proskaii. Obsthau 

 Ztg., 13 {1908), Xo. 1, pp. 2-8, fig. i).— An investigation has been made of a 

 disease of cherry trees which has proved quite destructive in the Rhine prov- 

 inces. Other investigators have attributed the loss to attacks of Cytospora 

 riibesccns or Talsa leiicostoiiia ( E. S. R., 15, p. 270). 



The author claims that the main cause of the trouble is due to the planting 

 of cherry trees in unsuitable soils and locations, resulting in an unfavorable 

 growth, and that the fungus attacks the trees only after they have been 

 weakened by the environmental conditions. Just what conditions of soil, 

 moisture, and exposure are best adapted to the gi-owth of cherry trees have not 

 been determined, and investigations are desired along those lines. 



Preliminary report on dust spraying experiments in Georgia, W. W. Chase 

 (Ga. Bd. Ent. Bid. 25, pp. 129-135).— \ preliminary account is given of tests 

 of 4 dust fungicides for the control of brown rot of peaches. Directions are 

 given for the making and application of these compounds, and, so far as known, 

 the formulas for preparation are given. 



The different dust sprays were applied to 3 varieties of peaches, but, so far 

 as testing the fungicidal value was concerned, the experiments proved a fail- 

 ure, as there was no rot developed on any of the trees. The season was an ex- 

 ceptionally dry one and the conditions were unfavorable for the deAelopment 

 of rot, even on the untreated trees. As shown by the defoliation of the trees 

 and the effect on the fruit, marked variations in susceptibility to the treat- 

 ment were indicated between different varieties. Some difference was also 

 noted in the effect of the various compounds themselves. 



The cocoanut stem disease, T. Fetch ( Trop. Agr. and Mag. Ceylon Agr. Sac, 

 30 {1908), No. 3, pp. 285-289). — The author reviews the conditions surround- 

 ing the stem disease of cocoanut palms, which he claims is of fungus origin 

 (E. S. R., 19, p. 1051). 



One of the most prominent symptoms of this disease is the bleeding from 

 decaying tissues. The results are given of inoculation experiments with spores 

 from cultures, as well as material from diseased trees, showing that the disease 

 is rapidly transmitted. Where cultures of the fungus were used, there was no 

 bleeding from the wounds at the end of 3 months, but when the infected spots 

 w«re cut open it was found that the disease had spread over an area of about 

 12 sq. in., and the bleeding began in another wound a little later. 



The disease does not seem to attack old trees, the stems of which have 

 become hard, and in combating it on young trees the author recommends 



