experim1':nt station reports. irir, 



stroyed by (ho bljiok rol. Tlie same formnln as for apple orchards (4 

 lbs, copper sulfate aii«l fi lbs, lime in 50 gals, water) has been used 

 in most cases and has given excellent results. 



For vineyards of bearing age, from fifty lo sixiy gallons per acre 

 are commonly used but, especially after the fruit has set, it is desirable 

 to use from sixty (o eighty or even one hundred gallons per acre, using 

 a power outlit which will carry n high pressure, and driving slowly. 



For the spraying of vineyards there are several outfits now upon the 

 market that are giving good results. While the Vermorel nozzle answers 

 fairly well for this jjurpose, more or less difficulty is experienced owing 

 to the clogging of the nozzle because of the small orifice, and to lessen 

 the trouble from this source it has been found well to use one ''Friend" 

 or ''Mvstrv Jr.'' nozzle for the center of the trellis with a Vermorel 

 nozzle above and below. 



The spraying can be greatly aided by taking pains to clean up the 

 vineyard. All of the mummied and rotted fruit should be removed from 

 the vines when they are pruned and the prunings should be burned. 

 Jt also assists in controlling the disease if the vineyards are plowed as 

 deeply as possible, taking pains to bury the leaves and rotted grapes, 

 if possible before the growth has started. As the tendrills which re- 

 main upon the wires are also a source of contagion, it will aid materially 

 if these are burned or cut off from the wires. 



As soon as the pruning and tying of the vines has been completed, 

 the vineyard should be sprayed, using copper sulfate solution (2 lbs. 

 in 50 gals, water) taking pains not only to thoroughly soak the vines, 

 but the ground beneath. 



As a rule, it will not be necessary to use Bordeaux mixture until 

 just before the blossoms are ready to open, at which time a thorough 

 application should be given, but if the rot has been very troublesome 

 in previous years and if the weather is favorable for its development, 

 a spraying can often be given to advantage when a growth of twelve 

 or fifteen inches has been made. As soon as the fruit has set and has 

 reached the size of small peas, another spraying should be given and 

 this should be kept up at intervals of ten days to two weeks until July 

 20, If the rot is still troubling and conditions favor its spread, one 

 or two later applications, using either soda Bordeaux or a weak solu- 

 tion of copper sulfate (1 lb. to 150 gals, water) can be given. 



As a rule, five applications of Bordeaux mixture will be sufficient 

 to hold the black rot in check and also prevent the attack of mildeAvs 

 and other fungous diseases and as this can be made at a cost of about 

 |1,00 per acre for each application, including the labor and material, 

 it will be found a very profitable oj)eration in sections where ilie rot 

 has prevailed. That this has been found the case at Lawton can be 

 shown from the fact that while only two or three persons sprayed their 

 vineyards in 1900. the number increased to ten or fifteen in 1907 and in 

 1908 it is reported that at least 125 power spraying outfits have been 

 sold in that section alone and that 75 to 90 ])er cent of Ihc vineyards 

 are being sprayed. 



It is probable, however, that many will not secure satisfactory results, 

 as it generally takes two or three years foi- a person to learn how to 

 spray so as to get the best results, the difficulties being in part a lack 

 of care in making the mixture, or, more often, a lack of thoroughness 



