« 2 - 



2,U,^>'TP 



1, For best drop control of Mcintosh, but with the least ripening effect, apply 



when drop commences (san© timing as MA), 

 2» When used at 20 ppm (read the label) it will reduce rate of drop for about 3 



weeks after application on Mcintosh, Do not use higher concentrations, 

 3» It can be applied as a spray or from an airplane. Dust may be satisfactory, 



if available. It may be concentrated safely up to 3X| 

 h» If a good storage Mcintosh apple is desired, pick the fruit within 2 v;eeks 



of spraying, even though fruit is not dropping, to keep ripening effect at a 



minimum. For longer drop control with less chance of hastened ripening, use 



2,li,$^TA on Mr^Intosh, 



5. t" or drop control on late varieties such as Baldwin, Rome, and Delicious, 

 delay the application until drop is about to start or before the foliage 

 becomes injured by frost or mites. Drop control may be expected for about 

 h weeks after treatment on these late varieties o This may be the best use 

 for 3tU,,5~TP since its ripening effect on many late varieties may not be too 

 pronounced a 



6, If used to hasten ripening and improve color of early and midseason varieties, 

 apply at least 3 weeks ahead of harvest date. Apples from trees high in 

 nitrogen levels, will be ripened more than f rulFf rom trees at lower nitrogen 

 levels , Do not use 2,Uj5-TP for Improving color on regular Gravenstein, 

 Duchess and Milton since color is not greatly inqjroved and the fruit may be- 

 oome mushy and worthless. It has been used for this purpose with some success 

 on Early Mcintosh and Tifealthy, Beware of over-ripeness, splitting ■; and water- 

 core when used as a ripener . The ripening effect is not uniform over the- en- 

 tire tree. Some fruits will be ripened much more than adjacent fruits. 



General Comments 



No hormone is effective for drop control if the foliage is in an unhealthy condi- 

 tion as a result of frost or mite Injury, Also, trees suffering from magnesium or 

 potassium deficiencies will drop their fruit readily and hormones will not prevent it, 



— -F.Vif.Southwick 



Magnesium Deficiency - Symptoms of magnesium deficiency 

 are appearing in some of our Massachusetts orchards. 

 This deficiency generally is more prevalent in heavy 

 crop years. Look for a yellowing or brov/ning of the 

 leaf tissue between the veins on the older leaves. In 

 severe cases, the older leaves may have dropped off to 

 such an extent that some branches or the whole tree 

 may be almost defoliated by late September, In addi- 

 tion, magnesium deficiency may cause heavy fruit Aropo 



—ED, 



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