112 MAINE STATE COLLEGE 



Results of Sprattxg. 



For several seasons past, experiments have been conducted in 

 various states for the purpose of determining a successful method 

 of controlling the apple scab fungus. It has been found that in 

 many instances mr.ch benei: is derived from the use of solutions 

 of some of the com] ounds of : : per. 



During the past season a series of experiments was planned 

 with the purpose in view of determining on an extended scale the 

 effectiveness of certain mixtures, and some of the problems 

 relative to methods of application The latter and most exten- 

 sive portion of the work was carried on in the orchard of F. 31. 

 Woodward of Vdinthrop, the work being conducted by Mr. C. E. 

 Moore, under the direction of the writer. Owing to local condi- 

 tions, most of the problems under consideration remain unsolved. 

 Much credit is dne Mr. Moore, however, for the faithfulness with 

 which he attended to the spraying. The work will be continued 

 next season. 



The first part of the work, that of determ in ing the effectiveness 

 of certain compounds, was carried on in the orchards of 1 

 Charles S. Pope, of Manchester, and the results were eminently 

 satisfactory. Fifty-nine Baldwin trees were sprayed with various 

 mixtures, and a suitable number was left to serve as ehe 

 The trees were of medium size and bore from one and one-half 

 to three barrels of fruit. The time at command when the fruit 

 was gathered was so limited that all of the trees could not be 

 examined critically ; but a sufficient number was examined to 

 give a fair basis for our conclusions. 



In gathering the fruit, except where the whole was taken, 

 about two and one -half bushels were taken at random from all 

 parts of each tree, the plan being to get a fair average of the 

 fruit. The baskets were filled from the lower limbs on all sides 

 of the tree ; then from the branches at the height of a m a n's 

 head ; then higher, and finally in the very top. 



Four different solutions were used : 



A. — A modified form of eau celeste. 



B. — Ammoniacal solution of copper carbonate, using 3 ounces 

 copper carbonate, 1 quart ammonia, and 30 gallons water. 



C. — Same as B. except that but 2 ormces o: copper carbonate 

 it - sed. 



