1608 Repokt of Farmers' Institutes 



posted at each institute and distributed to organizations. I>nlletin 

 No. 41, deseribinsi' the disease, has also been widely distributed and 

 copies are still available and will be sent upon request. 



nor -MILDEW 



Hop mildew is most prevalent in Otsego, Schoharie and Oneida 

 counties, east of Oneida County, and to a considerable extent 

 around Malone, Shortsville and Canandaigua. 



At present in commercial growing, the plants are not trained so 

 they can be sprayed with any degree of satisfaction. It is neces- 

 sary to have a dust mixture which can be blown on the vines. Ex- 

 periments show that a dust spray composed of pure flowers of sul- 

 phur was very effective in controlling this disease. When com- 

 pared with a mixture of sulphur and lime the difference was strik- 

 ingly in favor of the pure flowers of sulphur. Difiiculty was ex- 

 perienced in obtaining a machine that will properly cover the vines 

 with the dust spray. The two companies manufacturing machines 

 which are the most satisfactory, and which, are being remodeled 

 to meet the requirements, are: The Kansas C^ity Dust Sprayer 

 Manufacturing Company and the Childs Company, Utica. 



One should not apply less than forty or fifty pounds to the acre 

 of the flowers of suli)liur. Spraying should be l)egun about the 

 time the branches start up the strings. The second application 

 should be made when the flowers are in full bbissoni; the third 

 when they are in the burr stage, and the fourth when one can get 

 the sulphur into the overlapping bracts. In one instance twenty 

 acres were gone over in ( iie forenoon with horse and machine. The 

 cost of the sulphur is about two cents per pound. 



A number of brands of European sulphur of various grades have 

 been found. Some of these run as high as DO per cent, coarse 

 l)rimstone. The ordinnry Hour sulphur is too heavy to use. It is 

 not necessary that it be applied early in the morning, although that 

 is ])erhaps desirable. 



oxTox s:\rTTT 



This disease, loni>; known in Oranc-e Countv, has been found 

 in the vicinity of Canastota, \\'illianison aiul Fulton. A mixture 

 of 100 pounds of tlowers of sulphur to .50 pounds of slaked lime 

 per acre, applied in tlu^ di-ills, has jircven (luite effective. The 



