Both the 5 and 10 pound rate gave complete control of borers during the 

 first growing season. There was no evidence of chemical injury to the roots or 

 trunks hy either rst-^ under New York conditions. Since the Iwwr rate gives 

 complete control, there appears to be little reason for using the higher rate. 



Control measures against the borers in subsequent years will require trunk 

 sprays which should be applied to coincide with hatching of the earliest eggs. 

 (Usually early to mid-july.) 



---H. E. V.'ave 



Department of Entomology and 

 Plant Pathology 



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POMOLOGICAL PARAGRAPH 



Reducing Load of Fruit on the Leader of Trees on Mailing Rootstock 



Growers should avoid allowing too many fruit to develop on the leader of 

 trees on Mailing VII rootstock when they start to bear. This was evident in an 

 orchard of 4-year Red Delicious and Mcintosh on E. Mailing VII this past month. 

 Some of the leaders were arched toward the ground and in a few instances were 

 broken off because of the t^eight of the previous crop. 



William J. Lord 



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TH E CHEMICAL THINI^IIIG OF APPLE S IN 1963 



This spring we anticipate a somewhat heavier bloom and potential crop on 

 many of our Mcintosh trees than existed in 1962. The situation with other varieties 

 is less clear-cut and v/ill vary as usual from orchard to orchard. 



Our experimental results of the past 3 years indicate that Sevin is an excel- 

 lent thinner for Mcintosh and Delicious when applied from one to three weeks after 

 petal fall. In fact, it seems to be as good or better than NAD or NAA for Mcintosh 

 thinning and the best choice for Delicious at rates of 0.5 to 1.0 lb. (50% W.P.) 

 per 100 gallons. Sevin has no visible harmful influence on the foliage at these 

 concentrations and its chances of overthinning are minimal. It seems to be the 

 safest thinning material we've ever used on these two varieties. In addition, it 

 has about the same capacity to induce annual flowering as other thinning materials 

 when the degree of thinning vjith these materials is comparable. 



