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approximately five to ten (5-10) gallons of spray mixture will 

 treat an acre of non-bearing (1-5 year old) trees on a 12 x 12 

 spacing (310 trees). Spray volume should be adjusted to tree size 

 and density. 



On small trees we have found a small (2-3 gal.) hand sprayer 

 very useful. Branching is stimulated only on portions of the tree 

 that are sprayed. The spray can be directed only to the areas of 

 the tree where branching is desired. 



Latex applications . Uniformly apply the Promalin- latex mixture 

 with a brush or sponge to thoroughly cover the bark surface. Apply 

 only to one-year-old dormant branches. 



Under Massachusetts conditions we believe that foliar sprays 

 should be the first choice of application. Foliar sprays are 

 easier to apply and may be more effective. The exception to this 

 might be during the first year the trees are in the ground. 



Timing of Application 



Foliar sprays . Application of Promalin should be made during the 

 period when there are from one (1) to three (3) inches of new ter- 

 minal shoot growth. This period generally coincides with a timing 

 of one (1) to two (2) weeks after full bloom. There are a few var- 

 ieties such as Spur Rome that can be stimulated to branch beyond 

 this period. Nursery stock should be treated after trees attain 

 a terminal height at which the first lateral scaffold branches are 

 desired (i.e., greater than 30 cm). 



Latex applications . Since this treatment is intended primarily for 

 stimulating lateral growth from vegetative buds on one-year-old 

 dormant wood, applicaton of Promalin should be made in late April 

 and early May depending on season and locality. A useful guide is 

 to make the application just as the terminal buds on shoots or spurs 

 are beginning to break. Applications after lateral buds have broken 

 may cause some injury to the tender shoot tips and fail to promote 

 continued shoot growth from that point. 



Application Considerations 



Since Promalin is a plant growth regulator that must be absorbed 

 by the plant to be effective, best performance can be expected with 

 good absorption conditions. Furthermore, not all varieties respond 

 equally well to Promalin; Spur-type Mcintosh and Empire respond very 

 well, Delicious is intermediate and Northern Spy and Paulared are 

 almost unresponsive. 



Do not treat trees of low vigor. Results will always be dis- 

 appointing. Promalin will not stimulate growth or branching on low- 

 vigor trees or trees suffering from drought, winter injury or low 

 fertility. Promalin is mot effective when used on healthy, vigorously 



