AGRICULTURAL EXPERIMENT STATION. 



113 



D. — Copper carbonate in suspension — 2 ounces copper carbonate 

 in 25 gallons water. 



The unsprayed trees were so distributed as to serve as checks 

 for more than one solution. 



The accompanying table gives a comprehensive view of the 

 results obtained. 



Table VII. — Effects of Copper Solution on Apple Scab. 



Solution used. 



03 



si 



O 



s 



p 



>> 



42 



42 

 c3 

 O 



-3 



(D 



42 

 42 

 03 

 O 



m 



m 

 m 



<i3 



<B 



a 



■ '-1 



O c3 



fc to 



". <*2 



o3 3 



Remarks. 





1 § 





.£P 



c3 



2 

 o 



o 

 u 



S? 







h A 



£ 



55 



M 



Ph 



C-I=H 





A. 





















383 



231 



52 



78 



22 



60.3 739 







264 



138 



85 



33 



8 



52.31 84 5 







441 



160 



193 



74 



14 



36 3 80.0 







473 



276 



121 



66 



10 



58 4 83.9 







732 



504 



189 



34 



5 



68 9| 94.7 





Average per tree 



459 



262 



125 



57 



12 



57.0 



85.0 





972 



318 



524 



120 



10 



32.7 



86.7 







780 



463 



262 



48 



7 



59 4 



92.9 







541 



278 



226 



37 







51. 4 



93. 1 







918 

 802 



471 



345 



94 



8 



51.3 



88.9 





Average 



383 



339 



78 



6 



47.8 



9O.0 





C. 

















About three-fourths of 





936 



271 



506 



149 



10 



28.9 



83 



the fruits classed as 





734 



200 



391 



129 



14 



27- 3 



80 5 



slightly scabby were bet- 





490 



239 



19fi 



50 



5 



48. 8 



88.9 



ter fruits thau those free 

 from attack. 



Average 



D. 



720 



237 



364 



109 



10 



32.9 



83 5 



6R9 



15 



148 



329 



177 



2.2 



24.4 



J Sprayed 3 times : Mar 





484 



18 



146 



233 



87 



3.7 



33.9 



I 22, June 15, July 28. 





653 



488 



42 



20 



147 

 112 



299 

 252 



165 



104 



6.4 

 41 



28. 9 

 27- 



j Sprayed once, May 22. 



Average 



576 



24 



138 



278 



133 



4.1 



28.1 





Checks. 



















526 



10 



135 



205 



176 



1.9 



27.5 







1046 



23 



156 



508 



359 



2.2 



171 







615 



58 



179 



283 



95 



9.4 



38.5 







729 



30 



157 



332 



210 



4.1 P.S.fi 













The table appears somewhat formidable, but the figures are 

 significant. There was in every instance save one, — solution D, — 

 a marked difference in the amount of scab on sprayed and 

 unsprayed trees. 



The highest per cent, of fruit free from scab was obtained from 

 the use of the eau celeste, the gain being 52.9 per cent, or more 

 than half the crop. The greatest actual gain, in the quantity of 

 marketable fruit, however, was obtained from the use of the 

 stronger solution of copper carbonate. The actual increase of 





