BUSH FRUIT PRUNING 285 



such conditions a wire trellis will save sufficient fruit to 

 make it a profitable investment. Such a trellis consists of 

 posts set in each row at intervals of 15 to 30 feet ; the 

 canes are tied to a wire stretched along this line about 

 2 l /2 feet above ground. This keeps the canes upright 

 and facilitates cultivation and picking. (Figure 248 shows 

 this and other popular forms of trellises. Seealso Fig.247.) 

 Another satisfactory form of trellis is made as follows: 

 Crosspieces about 18 inches long are nailed to the top 

 of each post and two wires instead of one are stretched 

 from the ends of the crosspieces. The blackberry canes 



FIG. 243 BLACK RASPBERRY AFTER PRUNING. COMPARE WITH FIG. 242. 



are kept inside these wires, which support them on 

 either side. 



These systems of training are adapted to certain varie- 

 ties and to those sections of the country where the bushes 

 do not grow very high. When the canes grow very long 

 or are inclined to run somewhat like a grapevine, a much 

 higher trellis is used, with two wires (Figs. 247 b, 248-1), 

 one about 3 feet, the other about 5 feet from the ground 

 the height depending upon the vigor of the plants (Fig. 

 244). The canes of the erect varieties are fastened to 



