98 



MAINE STATE COLLEGE 



under somewhat different conditions and can not be compared 

 with these. 



Table XIII shows the results obtained from this trial. 



Table XIII. 



No. times sprayed. 



Twice 



Average 



Three times 



Average 



Checks 



Average 





696 > 28 

 917 I 35 



529 

 717 



833 



787 

 970 



863 



1006 

 839 

 774 



452 

 620 



278 



69 



873 I 45 



450 



574 

 491 



610 



415 

 485 

 531 



477 



195 



252 



30 



150 



168 

 206 

 151 



175 



565 

 2()5 

 120 



317 



4.0 



3.8 



42.9 



13.T 



8.8 

 9.9 

 5.7 



8 



0.0 

 4.5 

 12.7 



68.9 

 71.4 

 94.5 



76.4 



77.7 

 72. 3 

 84-4 



Remarks. 



All the fruit counted. 

 About .^ the fruit. Adja- 

 cent to lirst tree sprayed 

 three times. 



All the fruit. 



All the fruit. 



4 of all; very good. 



About half; small. 



78.8 

 t 

 41 2 5 of all. 

 62.3 A 11 the fruit. 

 81.3 " " 



34l 5.1 I 59.81 



A single tree in the first group being exceptionally free from 

 scab, the average percentage of fruits absolutely free is brought 

 higher than in the other cases ; but the average proportion of fruit 

 which would be classed as "No. 1" is greater on those trees which 

 were sprayed three times. With a single exception the amount of 

 "No. 1" fruit on all sprayed trees is considerably greater than that 

 on unsprayed trees, the average increase being 16.6 per cent, on 

 trees sprayed twice, and 19 per cent, on those sprayed three times. 



Summary. 



1. Spraying with copper solutions proves an effective 

 means of checking the apple scab. 



2. The average increase in the amount of salable fruit on 

 the trees sprayed, with the least effective solution over that 

 on the unsprayed. trees was 30 per cent, while the increase 

 on trees sprayed with eau celeste was nearly 52 per cent. 



3. Emi celeste proves more effectual than does the ammonio- 

 copper carbonate solution but as used there was a slight 

 injury to surlace of the fruit. 



4. Indications point strongly to the value of spraying early 

 in the season, before the blossoms open. 



5. Repeated applications of the fungicide during the season 

 are beneficial. 



