- 10 - 



ripeness (late harvest, slow cooling, delayed treatment, etc.) be- 

 fore treatment takes away from the benefit obtained from the treat- 

 ment. Benefit from treatment is increased when less ripe apples 

 are treated. However, factors that increased the ability of the 

 treatment to delay ripening and softening also increased their sus- 

 ceptibility to CO2 injury. The only exception to this was storage 

 humidity. We found that by not humidifying the storage until after 

 the COt treatment, injury was reduced but firmness was not. Later 

 tests m British Columbia support this finding. However, it re- 

 mains to be determined if this technique is practical, and if it 

 produces new problems. 



After examining the results of these tests, it was the unani- 

 mous conclusion of those who participated in them that for 'Mcin- 

 tosh', the possible benefits to be gained from the CO2 pretreat- 

 ment did not outweigh the possible losses that might result from 

 CO2 injuries. Unfortunately, 'Mcintosh' seems to be more sensi- 

 tive to CO2 than are 'Golden Delicious' in Washington. Unless a 

 way can be found to reduce the risk of injury without reducing the 

 delay of softening, CO2 pretreatment of 'Mcintosh' cannot be recom- 

 mended for commercial practice. 



*************** 



All pesticides listed in this publication are registered and cleared 

 for suggested uses according to Federal registrations and State Laws 

 and regulations in effect on the date of this publication. 



When trade names are used for identification, no product endorsement; 

 is implied, nor is discrimination intended against similar materials, 



NOTICE: THE USER OF THIS INFORMATION ASSUMES ALL RISKS FOR PERSONAL 

 INJURY OR PROPERTY DAMAGE. 



WARNING: PESTICIDES ARE POISONOUS. READ AND FOLLOW ALL DIRECTIONS 

 AND SAFETY PRECAUTIONS ON LABELS. HANDLE CAREFULLY AND STORE IN 

 ORIGINAL LABELED CONTAINERS OUT OF REACH OF CHILDREN, PETS AND LIVE- 

 STOCK. DISPOSE OF EMPTY CONTAINERS RIGHT AWAY, IN A SAFE MANNER 

 AND PLACE. DO NOT CONTAMINATE FORAGE, STREAMS AND PONDS. 



