8 N. H. AGK. EXPERIMENT STATION. [Bulletin 161 



is a satisfactory preventive for scab. It is possible that the self- 

 boiled mixture would have given better results if it had been made 

 in larger quantities, thus conserving the heat better. All of the 

 plots were apparently free from spray injury. 



The Sphaeropsis leaf spot was quite serious in the Ladd orchard. 

 The following table is based on a careful estimate of the condition 

 of the foliage on August 14. 



All of the fungicides gave very satisfactory results on leaf spot, 

 the self-boiled lime-sulfur holding the disease in check better than 

 any of the other mixtures. 



The spraying experiments were continued in 1909 in the same 

 orchards. All of the boiled lime-sulfur solutions were diluted to a 

 specific gravity -of 1.0117 before using except that used on plot 18 

 which was diluted to 1.0088. In making the self-boiled lime-sulfur,* 

 20 lbs. of lime and 20 lbs. of sulfur were used and the mixture later 

 diluted to 100 gallons. An insecticide was added with all the 

 sprayings except tbe first and the fifth. 



The first spraying was made April 26, before the leaves were out, 

 the second May 17, before the flower buds opened, the third June 3, 

 when the blossoms had mostly fallen, the fourth June 24 and the fifth 

 August 13. In the first spraying only plots 6 and 10 were treated 

 the former with copper sulfate, 1 pound to 25 gallons, the latter with 

 a 5-5-50 Bordeaux. In the last spraying only plots 12 to 18 in- 

 clusive were treated. 



The second spraying was followed by gentle showers and at the 

 time of the third spraying the Bordeaux plots showed serious spray 

 injury. 



About the middle of April a fire had escaped from a sugar camp 



* Scott, W. M. Lime-sulfur mixtures for the summer spraying of orchards. Bur. of 

 Plant Ind. U. S. Dept. of Agr. Cir. 27, 1909. 



