DISEASES OF PLANTS. 153 



(jiiiia awpcliiin or Siihiiccloiiia (niipcUiiiiin. the causo of tbo grape aiitliracnose, 

 are given. 



The various forms of re]iro(luc'tion are figured and described, especial atten- 

 tion being given to the morphology and biology of the organism. Attention is 

 called to the fact that the disease can not be controlled by a single winter treat- 

 ment of the vines with a strong solution of iron sulphate, as it does not fully 

 penetrate the sclerotia. Two applications at intervals of 15 days will be found 

 more efficient, but even this treatment will not wholly prevent the disease. 



Notes are also given on the anthracnose of peas and of plane trees due, 

 respectively, to (iJironporium iicrrii^cqiiKiii and G. VuKlonuthlanum or, as it is 

 more freipiently called. CoUrtotrichttiii liiKleiiiiitliininon. By the same methods 

 of stutly as those pursued in the investigations of the grape anthracnose, the 

 authors found the same kinds of organs of reproduction, namely, spermagonia, 

 pycnidia. cysts, yeast-like bodies, conidia, etc. and their development differed 

 only in individual particulars. 



Hints on the treatment of grape mildew, L. Degrully (Pror/. Af/r. ct Vit. 

 {Ed. VEst), 27 (1906), No. 1.5, />/>. 7/2.9--'/.3J ) .—Attention is called to the advisa- 

 bility of early and thorough spraying for the prevention of the downy mildew of 

 grapes, and formulas are given for the preparation of different fungicides, to- 

 gether with directions for their application. 



Report on experiments for the control of mildew in 1905, E. Chuard, H. 

 Faes. and F. Porchet iCJiroH. Af/r. Vaud., 19 {1906), Xos. 6, pi). I'fo-l.lS ; 7, 

 pp. 181-1:'^9 : H, pp. 226-23.5; and 9, pp. 270-277/). — An account is given of some 

 cooperative experiments on the control of grape mildew by the use of fungi- 

 cides. This work was begun in 1903 and continued in 1904 and 1905, and the 

 present report is based very largely upon the results obtained in 1905. 



In the investigations it was found that the mildew made its appearance 

 earlier than usually reported, on which account the first ai)plication of the fun- 

 gicide should be advanced beyond the date generally recommended, namely, 

 June 15. In the vineyards treated (5 reported perfectly satisfactory results; in 

 3 others the results were less satisfactory, but an analysis of the reports indi- 

 cates that the treatment was not strictly in accordance with the recommenda- 

 tions given. 



All the reports show that the fungicides which were used, consisting of Bor- 

 deaux mixture, soda Bordeaux, and copper acetate solutions, need not be used 

 in strengths gi-eater than 2 per cent, these being as efficient as those used in 

 greater concentration. For the first application not less than GOO liters per 

 hectare should be employed, to be followed by 3 or 4 applications at the rate 

 of 1,100 to 1,200 liters per hectare. The time intervening between the applica- 

 tions should not exceed 20 days during years favorable for the development of 

 the fungus. 



Smut of cultivated bamboo, S. IIori (BiiI. Imp. Cent. Ai/r. Expt. Sta. .Japan, 

 1 {190.5). No. 1, pi). 73-89. pis. ;)._The author notes having received in 1904 

 specimens of the large bamboo {PhyUoHtachys piihcnda) that were affected 

 with a snuit. The disease always occurs on the younger internodes and growing 

 portions of the branches, and apparently it may appear whenever the sur- 

 rounding conditions are favorable, from the time the spring buds open until 

 the growth of the branches ceases. Such diseased branches seem generally 

 to stop further gi'owth. and finally the entire plant is destroyed. 



The smut has been found on several kinds of bamboo. l)oth cultivated and 

 wild, but where the large bamboo is extensively cultivated it seems to be con- 

 fined to that species. At i)resent it is known to occur on 4 sjiecies. namely. 

 Ph yllostachyn bambusoidcs, P. pubcrula, Sasa raniosa, and Arundiuaria shnoni 

 chino. 



