562 Agricultural Experiment Station, Ithaca, N. Y. 



It would seem as if the disease could be prevented by keeping, 

 the growing canes covered with Bordeaux mixture. If this is tried^ 

 the fungicide should be applied whilst the shoots are less than six 

 inches high, and the application must be repeated every week or 

 ten days until the cane has grown to a height at which the disease- 

 will not injure it. Green has been able to keep plants free from, 

 the disease with both Bordeaux mixture and ammonical carbonate 

 of copper.* He advises for sprayings, one of them before growth 

 begins, and the last just before blossoming time. Beech has had 

 similar results.f The bushes were sprayed six times. Late in 

 ISTovember, an examination showed that " the canes in the treated 

 rows were nearly free from disease, while those that were not sprayed 

 are still very badly affected." 



Mr. L. T. Yeomans, Walworth, made a similar test this year 

 under our suggestions, upon Gregg. He sprayed with Bordeaux 

 mixture as follows : May 16 ; May 20 (repeated this early because 

 the first spraying seemed to have hit the leaves more than the 

 canes) ; May 29 ; June 7th. On newly set plants, these applications 

 were made, and also the following additional ones : June 13th ; 

 June 17th ; June 26th ; July 9th, These applications were made 

 carefully and thoroughly, but neither Mr. Yeomans nor myself 

 could detect any immunity from disease on the sprayed plants. It 

 should be said, however, that the disease was slight upon all th& 

 plants. 



My associate, Mr. Lodeman, made a similar experiment this year 

 in the University gardens, and his account follows : " Two varieties 

 of raspberries were selected, Schaffer and Ada, one part of the rows 

 being repeatedly sprayed with Bordeaux mixture. The first appli- 

 cation was made May 18th ; this was followed by others on June 

 13th, June 26th and July 11th. The plants and canes were each 

 time deluged with the mixture to such an extent that they lost their 

 normal green color and appeared as blue as the mixture could make 

 them. It was found that the canes could not be nearly so well 

 protected as the leaves, as the liquid refused to adhere to the 

 glaucous surface ; it collected, however, upon the ends of the thorns,, 

 giving them a marked blue tip. 



" Some plants of both varieties received only the two applications 

 made in June, while certain Shaffer plants remained untreated. 



*Bull. 6, Vol.iv. Ohio Exp. Sta. 119 (1891). 



tBul. 81, New York State (Geueva) Exp. Sta. 592 (1894). 



