. The commercial apple industry of North America. LATE XVI.— Diseases of the apple. 1, Bitter-rot on Pippin showing spotsI red specks. 2, Sooty-fungus and fly-speck. 3, Apples affected with th«b fungus. 4, Leaf aflected with apple-scab. Pruning and Thinning 261 Central leader system. By this method one centralleader is allowed to develop yearafter year until its increasing-height is naturally checked as thetree begins fruiting. Such lat-eral branches are allowed to re-main as will not crowd and willgive the best distribution and bal-ance in later years. The lateralbranches are considerably sma
. The commercial apple industry of North America. LATE XVI.— Diseases of the apple. 1, Bitter-rot on Pippin showing spotsI red specks. 2, Sooty-fungus and fly-speck. 3, Apples affected with th«b fungus. 4, Leaf aflected with apple-scab. Pruning and Thinning 261 Central leader system. By this method one centralleader is allowed to develop yearafter year until its increasing-height is naturally checked as thetree begins fruiting. Such lat-eral branches are allowed to re-main as will not crowd and willgive the best distribution and bal-ance in later years. The lateralbranches are considerably smallerthan the central leader and strongunions are formed. While thissystem of pruning has never beenwidely practiced by commercialfruit-growers, it has had somepopularity, especially for dwarfsand certain varieties such as theJonathan and members of the Ben Davis 5.) /\ 1 1 / Fig. 5.— A wellpruned young Jonathantree trained to the cen-tral leader form. (See Advantages. 1. Strong trees are produced. Crotches seldom split apart. 2.
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1921
