138 MAINE STATE COLLEGE. 



will be published in our annual report for 1893. A copy of this 



report will be sent to those requesting the same. 



W. M. MUNSON, 



Horticulturist. 

 Maine State College, ) 

 Orono, Me., Jan. 8, 1894. J 



BULLETIN No. 8. 



SPRAYING EXPERIMENTS. 



Spraying with some solution of copper as a protection from the 

 attack of apple scab is coming to be looked upon as a necessity 

 by many of the more progressive orchardists. During the past 

 three seasons the writer has been engaged in solving some of the 

 problems incident to this work. The results, so far as obtained, 

 have been detailed in the annual reports of the experiment station.* 



The principal work of the present season was a comparison of 

 the effectiveness of different mixtures. The failure of certain 

 trees, set apart for that purpose, prevented reaching more definite 

 conclusions regarding the best time for spraying. 



The materials used in the work here mentioned, were as follows : 



1st. Modified eau celeste. — 2 lbs. copper sulphate, 2 1-2 lbs. 

 carbonate of soda, 1 1-2 pts. ammonia and thirty-five gallons of 

 water. 



2nd. Bordeaux Mixture. — 6 lbs. copper sulphate (Blue Stone), 

 4 lbs. fresh lime, dissolved separately, then mixed and diluted to 40 

 gallons. 



3. Bordeaux Mixture and Paris Green. — Same as No. 2 with 

 addition of Paris green in the proportion of 1 lb. to 250 gallons. 



4th. Paris Green. — 1 lb. Paris Green in 250 gallons water. 



The season was very dry and the trees were much freer from scab 

 than in previous years. That there was marked benefit from the 

 treatment is, however, shown in the accompanying photographs of 

 fruit from contiguous trees and also in the table. 



*Rep. Maine Exp. Sta., 1S91, p. 112; 1892, p. 92. 



