126 



JIAINK STATE COLLEGE 



TABLE XIII. 

 RESULT- OS SPKAYING TO PREVENT APPLE SCAB. 



















^ 



~ 





















— 



5 



^ 



- 



c 







T. 





■~ 















Treatment. 



7 Z. 



- 



X 



- 

 - 



~ 





- - 



— '- 



- 



be 



X 



■z 

 - 





- >■. 













*- 



* 



r. 



- 



— 



I.u" celeste. 



Average per tree 536 



Bordeaux Mixture 



Average per tree 5-J6 



Bordeuax Mixture and Paris Green Sll 



A verage per tree 



Check-. Xot Sprayed 



A verage per tree 



651 



. 4-" 



156 



15 



73.7 



557 



360 



189 



s 



64.6 



459 



36S 



73 



IS 



SO. 2 



536 



40:t 



139 



14 



72.8- 



501 



399 



91 



11 



79.6 



591 



474 



114 



3 



SO. 2 



436 



677 



102 7 79.9 



12S 6 83.5 



639 



509 



1-26 



H 



79.7 



615 



524 



87 



* 



85.2 



755 



570 



114 



5 



82.8- 



566 



•214 



337 



15 



37.8 



550 



291 



24- 



11 



52.9 



539 



130 



39-2 



17 



24.1 



552 



212 



292 



14 



38. 3 



Much of the fruit classed as ."slightly scabbed*' would grade as- 

 Ko. 1 fruit, but as is well known, the fuugus grows rapidly after 

 the fruits are packed ; hence our arbitrary line between fruit abso- 

 lute ly free from scab and that slightly affected is rigidly adhered 

 to. 



As shown by the table, the best results were obtained from the 

 use of a combination of Bordeaux mixture and Paris green. This 

 fact would indicate a possible fungicidal value for Paris green. 

 That this value is slight, however, was shown by some trees 

 sprayed with Paris green only. Our experiments have not been 

 sufficiently extended to warrant definite conclusions on this point. 

 The Paris green has, however, an important use in reducing the 

 proportion of wormy fruits. 



