1910.] Horticultural Institute at Geisenheim. 739 



feeling that he receives the latest first-hand information that I 

 ascribe the good relations existing between the Institute and 

 the growers. The actual experimental work is, of course, 

 largely governed by the needs of the region in which it is 

 situated. Geisenheim is in the midst of an important vine- 

 growing region, so that diseases of the vine form an important 

 part of the work. 



Among the diseases that make their appearance in the 

 grounds of the Experiment Station, and which, without being 

 epidemic in form, nevertheless cause a varying amount of 

 damage annually, the following are mentioned in the yearly 

 report for 1908 : — American Blight of Apples (Schizoneura 

 lanigera), Smaller Winter Moth (Cheimatobia brumata), Vine 

 Weevil (Rhynchites betuleti), Big Bud (Eriophyes rib is), 

 Fusarium Disease of Beans (Gloeosporium fagicolum). In 

 addition, many other insect and fungus pests were dealt with 

 in the course of the year. 



Among the diseases common to the countryside, which are 

 regarded as calling for special consideration as regards pre- 

 ventive and remedial measures, are the following epidemic 

 diseases, which have been introduced from other districts : — 



The True Mildew of the Vine (Oidium Tuckeri), the False 

 Mildew of the Vine (Pcronospora viticola), the Vine Louse 

 (Phylloxera vastatrix), American Gooseberry Mildew 

 {Splicer oihec a mors-uvce.) 



To illustrate the methods adopted, I may instance the case 

 of Peronospora viticola. In all the countries of Europe where 

 this disease of the vine has been introduced almost all, if not 

 the entire crop, would be lost were the vines not regularly 

 sprayed with Bordeaux mixture. This spraying must add 

 very considerably to the expense of cultivation, but the 

 German growers know perfectly well that without this treat- 

 ment the crop would be a complete failure. One spraying is 

 not nearly sufficient. One such plantation which came under 

 my notice was in a miserable condition, scarcely a leaf being 

 unmarked by the disease in July. It will be understood, 

 therefore, that vine spraying is a costly affair, and any 

 methods tending to make it more effective or less costly would 

 be of great benefit to the community. It was on this problem 

 that the station was engaged at the time of my visit. It is not 



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