54 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Codlin Grub trap is a special structure consisting of several 

 boards of a convenient length fastened together in the middle, 



THE APPLE GRUB AND MOTH. 



and the respective pieces kept apart by means of thin laths. The 

 grubs readily take to this, and from four to eight hundred traps 

 can be examined by a man per day and the grubs collected in a 

 vessel. 



