92 MAINE STATE COLLEGE 



SPRAYING EXPERIMENTS. 



The work of spraying to prevent the attack of the apple scab 

 was continued on the same line as last year, both Mr. C S. Pope 

 of Manchester and Mr. C. E. Moore of Winthrop, co-operating- 

 The season was verj'' unfavorable and it was difficult to find a suit- 

 able time for the work. In nearly every instance rain fell within 

 twenty-four hours after the spraying was completed. As a result, 

 the effects of the fungicides were somewhat modified and were 

 less striking than those obtained last year. 



Results in Mr. Pope's Orchard. 



In Mr. Pope's orchard the work was of suflOicient extent to war- 

 rant very free conclusions from a commercial point of view. 

 The orchard is situated on a gravelly hill-side having a north- 

 western exposure and has been very subject to the attack of the 

 fungus for some time. 



The main object in view in this work was to determine the rela- 

 tive values of different solutions and to study the effects of 

 applying the mixture at different times. 



To this end, instead of single trees, given different treatment, 

 contiguous rows extending down the hill-side were selected. In 

 this way all rows presented essentially the same conditions, part 

 of the trees being on high land and part on low. This matter of 

 location is of the highest import since it has been observed — 

 in this orchard and some others I have studied — that trees on high 

 exposed situations are apparently more subject to attack than are 

 those on lower ground. 



Three solutions were used in the test as follows : 



Solution A. Modified eau celeste, consisting of two pounds 

 copper sulphate, two and one-half pounds carbonate of soda, one 

 and one-half pints ammonia and thirty gallons water. 



Solution B. Five ounces carbonate of copper, three pints 

 strong ammonia, fifty gallons water. 



Solution C. Three ounces carbonate of copper, one pound car- 

 bonate of ammonia, fifty gallons water.* 



* For directions as to preparation of mixtures see Rep. Maine Ex. Sta., 1891, p. 116. 



