64 PROTECTION OF PLANTS, 1916-17 



killed as they are captured. The collection of the adults will be practical 

 only on very valuable young trees, and the' collections should be made 

 frequently to be of much service. If made annually in nursery rows and 

 plantations once each week during the egg-laying season, in conjunction 

 with the destruction of the fading terminals, the practice should assist 

 materially in reducing the annual injury. On very valuable trees in parks 

 and private grounds the collection should be made almost daily. 



