GRAPE-PRUNING ON THE PACIFIC SLOPE 173 



should be made longer, with four, five, or even six eyes in some 

 cases. This is in order to obtain some fruit, which might not 

 be obtained from long pruning varieties by Leaving many 

 spurs. With extremely vigorous vines one fruit cane may be 

 left at this pruning. The wires of the trellis should be put up 

 this year, if this has not already been done. 



Fig. 33 A and 33 B illustrates the second step in the production 

 of a fan-shaped head. This form of head is used only for trel- 

 Used vines and long-pruned 

 varieties. The formation 

 of the head and the manage- 

 ment of the fruit canes are 

 therefore conveniently dis- 

 cussed together. 



By comparing the pruned 

 vine, Fig. 33 B, with the 

 unpruned, Fig. 33 A, the 

 method of pruning will be 

 made clear. The unpruned 

 vine shows two arms, the 

 spurs of the previous year, 

 from one of which have 

 grown three vigorous canes 

 and from the other two 

 somewhat less vigorous. 

 The pruned vine shows a complete unit, that is, a fruit cane 

 with its accompanying renewal spur on the vigorous side and 

 a spur for the production of fruit wood for the following year 

 on the other side. If the vine had been <more vigorous two 

 complete units would have been left and one or two extra 

 spurs. 



As the form of the vine is determined by the renewal spurs, 

 special attention should be paid to their position. In this case, 

 the middle cane on one arm and the lower cane on the other 



FIG. 33. A, before pruning; B, after 

 pruning. 



