- 4 - 



Fruit to be placed in storage at 32°F must be picked at proper 

 maturity. Fruits to be sold through January 1, should receive no 

 more than 1/4 pint o£ ethephon per 100 gallons of water and be har- 

 vested 7-8 days after treatment. Although these fruits should store 

 well until January 1, they may be softer than Alar*-treated fruits. 



Table 4. Suggested use of ethephon for promoting uniform ripening 

 and red color on 'Mcintosh' apple trees. 



Purpose 



Compound, timing and rate 



Fruit for sale 

 1st or 2nd week 

 of September 



Fruit to be 

 picked during 

 normal harvest 

 and held at 

 32°F in air for 

 1 month or less 



Fruit to be 

 picked during 

 normal harvest 



and held at 

 32°F in air 

 as late as 

 January 1"^ 



Alar* - mid-July at 1 lb/100 gals 



plus 

 ethephon - 8 to 12^ days prior to anticipated 

 harvest at 2/3 to 1 pt/100 gals. 



plus 

 2,4,5-TP same timing as ethephon spray at 20 ppm 



Alar* - mid-July at 1 lb/100 gals 



plus 

 ethephon - 7 to 8 days prior to anticipated 



harvest at 1/2 to 2/3 pt/100 gals^" 



plus 

 NAA or 2,4,5-TP same timing as ethephon spray 

 at 20 ppm 



Alar* - mid-July at 1 to 1-1/2 lbs/100 gals 



plus 

 ethephon - 7 to 8 days prior to anticpated har- 

 vest at 1/4 pt/100 gals 



plus 

 NAA or 2,4,5-TP same timing as ethephon spray 

 at 10 ppm 



^Weather and tree vigor, etc. affect color development. It may be 

 best to allow 12 days, but be prepared to harvest sooner. 



y2,4,5-TP is preferred if 2/3 pt of ethephon is used because its 



X 



pre-harvest drop control capability is greater than that of NAA. 



If fruit are in good condition, they will store satisfactorily in 

 CA. 



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