100 

 80 

 60 

 40 

 20 



Red color (%) 



Oak 

 Mcintosh 



100 

 80 

 60 

 40 

 20 



U.S. Extra 



♦ — • — •- 



B 



8/17 8/31 0/14 0/28 10/12 10/26 8/17 8/31 0/14 0/28 10/12 10/28 



24 

 22 



20 

 18 

 16 

 14 



Flesh firmness (lbs) 



12 1 — 

 8/17 



16 

 14 

 13 

 12 

 11 

 10 



Soluble solids (%) 



8/31 0/14 0/28 10/12 10/26 8/17 8/31 0/14 0/28 10/12 10/26 



Titratable acidity (meq/100ml) 



10 



e 



-« — * — *- 



200 



150 



100 



60 



nternal ethylene (ppm) 



8/17 8/31 0/14 0/28 10/12 10/26 8/17 8/31 0/14 0/28 10/12 10/26 



Figure 1. Changes in fruit quality parameters and characteristics of Gala and Mcintosh prior to, during 

 and after the normal harvest period: August 24 through October 19. A, red color, B, U.S. Extra Fancy; 

 C, flesh firmness; D, soluble solids; E, titratable acidity; F, internal ethylene. 



Fruit Notes, Spring, 1990 



