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the fresh market. At least 1 trap per acre should be employed. 

 Berries grown for processing may require treatment when fewer than 

 5 flies per trap per week are captured. 



Where can the traps be purchased? Sticky-coated, ammonium- 

 acetate-baited fluorescent yellow rectangles can be bought from 

 Zoecon Corporation, 975 California Avenue, Palo Alto, California 

 94304, at a cost of about $1.00 each. Each rectangle will prob- 

 ably need replacing with a new one at mid-season owing to accumu- 

 lation of large numbers of other large insects which may cover up 

 and obscure the smaller maggot flies on the trap. Sticky-coated 

 3-inch red spheres, likewise baited with ammonium acetate, may be 

 purchased for about $1.00 each from New England Insect Traps, Box 

 301, North Amherst, Mass. 01059. Such spheres are quite selective, 

 capturing relatively few other insects. They will last many sea- 

 sons and require coating with Tanglefoot only at the beginning of 

 the season and perhaps again after a series of heavy rains. Which- 

 ever type of trap you choose to use, it should, over the long term, 

 pay you dividends in reduced spray costs for this insect. 



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POMOLOGICAL PARAGRAPH 



Ethephon's use to promote early-ripening of Mcintosh. Our sugges- 

 tions for ethephon use on Mcintosh are based on 3 time periods for 



sale of ethephon- treated fruit prior to normal harvest time 



(Labor Day or shortly after), during normal harvest, and after sev- 

 eral months of storage. To have well-colored Mcintosh by Labor Day, 

 we suggest applying ethephon at 2/3 to 1 pint plus 20 ppm 2,4,5-TP 

 8 to 12 days prior to anticipated harvest. These suggestions have 

 worked well at our Horticultural Research Center. In 1975, we ap- 

 plied 1 pint of ethephon plus 20 ppm 2,4,5-TP with an airblast 

 sprayer on August 27 and had adequate color for harvesting by Sep- 

 tember 2. In 1976, we applied the same mixture on August 16, and 

 harvested the fruit August 26. 



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