RESULTS. 



23 



and possil)ly uppU^ scab, these results would indicate that hitter-rot 

 yields more completely to treatment than any other disease known to 

 the writer. The infection period of bitter-rot bein^- nmch longer, a 

 greater number of a])plications are required to secure protection 

 throughout the season, but it would seem that an apple coated with 

 Bordeaux mixture would not be attacked l)y bitter-rot even under 

 conditions otherwise most favorable to the fungus. 



Tablk II. — Scheme nf xpraying lit Aron, ]'<(., ilnriiKj thr siii.tun dj lii(i.'>, mid /7.s rcKuUs. 



Plot numbers (2 trees to 

 each plot). 



1.. 

 2.. 

 3.. 

 4.. 

 5.. 

 6.. 

 A. 

 7.. 

 8.. 

 9.. 

 B. 

 10. 

 11. 

 12. 

 C. 

 D. 

 15. 

 16. 

 17. 

 K. 



Treatment with Bordeaux mixture (5-5-60 

 formula). 



' I " I " 



Check — one untreated tree. 



Picked Sept. 19 to 23. 



Sound 

 fruit. 



Check— one untreated tree. 



' I " I " 

 Check — one untreated tree. 

 Check — one untreated tree. 



Check— one untreated tree. 



Bughcls. 



18. .TO 

 47. .'lO 

 .')(j. 00 

 H. 00 

 32. 7.'. 

 68. .TO 



.00 



56.50 



7.00 



28. .tO 



.00 

 59. 00 

 42. 25 

 28.50 



.00 



.00 

 .52. 25 

 52.50 

 40.00 



.25 



' Percent- 

 Rotten I age of 



fruit. 



' .sound 

 i fruit. 



Bunkels. 



30. 25 



22.60 



2.00 



1.75 



1.15 



.70 



10.00 



14.00 



6.50 



6.00 



17.00 



6. .50 



6. 50 



24. 75 



13.00 



20.76 



5.25 



3.75 



5.00 



16. 25 



37.9 

 67.8 

 96.5 

 96.8 

 96.6 

 98.9 



f'00.0 

 80.1 

 51.8 

 82.6 



" 00. 

 90.0 

 86.6 

 53.5 

 00.0 



«00. 



90.8 



93.3 



88.8 



1.5 



a Of the check trees, A had 1 sound apple. B 6, and D 2, but the percentages were too .small to show 

 in the table. 



In the first column on the left of this table the numl)ersof the sprayed 

 plots are given in figures and the unspra^^ed trees are indicated by let- 

 ters. The dates of the applications are given at the heads of succeeding 

 columns, and the ditto marks jifter each plot number refer to these 

 dates. For example, the marks after Plot No. 1 indicate that this plot 

 was sprayed April 8, j\lay 1, and May 9; while Plot No. 12 wasspraA'ed 

 July 25, August 7 and 22, and September 4. The three columns on the 

 right show the results in bushels of sound fruit, bushels of rotten 

 fruit, and percentage of sound fruit for each plot, as determined when 

 the crop was picked, September 19 to 23. The check plots are placed 

 in the table about as the}' occurred in the orchard, Plot A being- 

 located near the lower side, while Plot E is at the upper side. 



Plot 1, as will be seen from the table, received but three applica- 

 tions (those usuall}^ given in the treatment of apple scab), on April 8, 

 May 1, and May 9, with the result that only 37.9 per cent of the fruit 

 was saved from bitter-rot, showing that the treatment was stopped too 

 early. (PI. V, fig. 1.) 



