'Nfav York Agricultural Experiment Station. 327 

 GENEVA EXPERIMENTS. 



PLAN. 



The tests were carried on in the Industry plantation of the 

 Van Dnsen Nursery Co., near Geneva. During the past few sea- 

 sons the attacks of mildew here were so severe that the crops were 

 destroyed and many bushes had been either killed outright or so 

 badly weakened that they were ^Adnter killed. The part of the 

 plantation used for tliis work contained 28 rows, 20 bushes to 

 the row. 



The general plan of the work in this plantation was much like 

 that for the work done at Tnmiansburg. The principal new 

 feature Avas " -winter spraying " with several fungicides. This 

 was for the purpose of determining whether or not it would prove 

 practical to spray with strong solutions while the bushes are 

 dormant. The object was to compare the results obtained from 

 bushes given the winter treatment and sprayed throughout the 

 season, with results from bushes where spraying was begun early, 

 medium early and late; also to compare soda-Bordeaux and cop- 

 per carbonate solutions -with potassium sulphide as a preventive 

 of the disease. 



winter TREATMENT. 



The severe weather of "winter and early spring prevented the 

 application of this treatment until April 5, but as the buds re- 

 mained perfectly dormant all that time this date was satisfactoiy 

 for the test. Each' one of the following solutions was applied to 

 a separate row of bushes: 



Copper sulphate, 1 oz. to 1 gal. water. 



Potassium sulphide, 1 oz. to 1 gal. Avater. 



Iron sulphate, saturated solution, 5 pounds to 1 gal. water, 

 plus 1 per cent of sulphuric acid. 



^Soda-TBordeaux mixture. — 1 pound copper sulphate, 1-3 pound 

 lye, to 5 gals, water. 



1 A modification of Dr. Halsted'55 foinnila, as given in Nineteenth Report 

 New Jersey Exp't Station, p. 336. 



