l86 MAINE AGRICULTURAL EXPERIMENT STATION. I9I5. 



recorded for plot 3 where the first spray apphcation was iden- 

 tical with that on plot 10. No other evidence of spray injury on 

 foliage or fruit was observed on plot 10 previous to harvest 

 time. 



No leaf injury could be detected on plots 3, 4, 5, 7 and 11 

 during the season and whatever fruit russeting was present on 

 any of these plots was not sufficiently prominent to be noted in 

 the field. 



THE EFFECT OF THE DIFFERENT SPRAYS ON THE FRUIT. 



The apples on the experimental plots were harvested on 

 October 7 and 8 and were immediately sorted into 3 classes, — 

 namely, the number of smooth or perfect apples, the number 

 scabby and the number russeted. 



Except in the case of plot i, the sample from which to obtain 

 this sorting record consisted of 20 barrels of fruit selected at 

 random from the crop produced on the two central rows of 

 trees on each plot. By rejecting the crop on the two outer 

 rows it was felt that the effects of the sprays drifting with the 

 wind from adjoining plots was largely eliminated. In the case 

 of plot I, sprayed with bordeaux mixture and consisting of but 

 3 rows, the 20 barrels used for sorting came from the central 

 row and the inner half of each tree on the two outside rows. 



The following is a tabulated summary of the results obtained 

 from sorting and counting the number of fruits on each of the 

 different plots. The percentages of smooth, scabby and 'rus- 

 seted fruits do not always total 100 for in some instances apples 

 were found which were both scabby and russeted and were 

 therefore counted twice. 



All apples which showed any traces of scab, however small, 

 were classed as scabby. No attempt was made to separate these 

 into classes showing different degrees of scabbiness, for it was 

 felt that the fundamental question under consideration was the 

 relative efficiency of the different spray materials in the pre- 

 vention of disease under conditions as near alike as they could 

 be made in an ordinary field experiment. Therefore, it would 

 seem that the only basis upon which this could be judged, which 

 would eliminate matters of personal judgment, is whether or 

 not scab was present in any degree. On the other hand no 



