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POMOLOGICAL PARAGRAPH 



Effect of Alar on the response of Mcintosh apple trees to chemical 

 thinner's^ Last year, we reported that an application of Alar* in 

 mid-August, 1971, increased fruit set on Mcintosh apple trees in 

 1972, but had no influence on the thinning ability of naphthalene- 

 acetamide (NAAm) or a combination of NAA plus carbaryl. NAA, 10 

 ppm or NAA, 10 ppm plus 1/2 lb of 50% WP carbaryl, seriously over- 

 thinned while milder treatments, carbaryl, 1/2 lb of 50% WP and 

 NAAm at 50 ppm (rates commonly used in Massachusetts) resulted in 

 very satisfactory thinning. 



It was of interest to note that the research findings of Dr. 

 S.J. Leuty, Smithfield Experimental Farm, Trenton, Ontario (Influ- 

 ence of SADH (Alar*) on response of 'Mcintosh' apples to chemical 

 thinning sprays, HortScience 9:193-195, 1974) were in agreement 

 with our results. His findings showed that Alar applied one or two 

 consecutive seasons for preharvest drop control did not reduce re- 

 sponse of Mcintosh apples to chemical thinners the following year, 

 and increased dosage of these materials (carbaryl or NAA) was not 

 warranted. 



*Trade name 



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



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 endorse- 

 ment is implied, nor is discrimination intended against similar ma- 

 terials . 



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. 



