the vines and making them more liable to winter injury. 
Some experimental work has been done with pruning 
after December fifteenth, and up to March fifteenth. 
This late pruning is not generally recommended because 

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Pruning Guide 
. Showing development of main arm. 
Shows development of fruit spurs. 
Shows continued development of fruit spurs. 
. Shows mature fruit spurs. 
Cam > 
the result of continued late pruning has not been de- 
termined. Late pruning may be used in an emergency. 
The first two years all undesirable growth may be re- 
moved in the summer. This will aid in training the vines 
onto the trellis. Summer pruning is not recommended 
after the first two years. Summer pruning may be used 
on young plants without injury if the new growth is not 
allowed to become too large. Summer pruning is for 
training purposes only. The object of the dormant prun- 
ing is the balancing of vegetative and fruit growth. All 
growth should be cut off of the main stem except the 
main arms that run along the wires. 
(8) 

