10 



N. II. AGR. EXPERIMENT STATION. [Bulletin 161 



The lime-sulfur solutions again controlled the scab as well or 

 better than Bordeaux. The results on spray injury show very strik- 

 ing contrasts. About 50 per cent, of the leaves on the Bordeaux 

 plots showed spray injury while the lime-sulfur plots were 

 practically free from injury. The injury was greater on the lime- 

 sulfur plots where Paris green was used as an insecticide. The 

 addition of lime and sulfur with the Paris green apparently de- 

 creased the injury. 



The three years' work in the Mcintosh orchards indicates that 

 both Bordeaux and lime-sulfur are satisfactory fungicides for the 

 control of scab and leaf spot. The home-made Bordeaux made a 

 better showing than any of the proprietary mixtures and the com- 

 mercial lime-sulfur better than the self-boiled. 



FOUR YEARS' WORK IN BALDWIN ORCHARDS. 



In the summer of 1907 spraying experiments were made in a 

 Baldwin orchard that was known to be infested with fruit spot. 

 The first spraying was made June 17, about two weeks after the 

 blossoms had fallen, the second June 25, the third July 9 and the 

 fourth July 27. It had been found that alkaline conditions would 

 check the growth of the fruit spot fungus in laboratory cultures and 

 it was thought advisable to test the effect of lime on the disease. 

 Plot 6 was treated with a solution having 5 pounds of lime to 

 50 gallons of water; Plot 7 with a resin lime mixture having 5 

 pounds of lime and 5 pounds of resin fish oil soap to each 50 gallons 

 of water. The following results were obtained by an actual count 

 of the spotted and unspotted fruit at the time of gathering. 



A study of the data shows that the application made on July 9 

 was more effective than any other, and that the spraying of July 

 27th materially reduced the disease. While the lime was beneficial 



