394 THE CANADIAN ENTOMOLOGIST 



varieties to such an extent as to scarcely repay picking. The 

 work of the insects was, for the three years in which we had it 

 under observation, so severe that most of the blossoms would be 

 stung to death before forming fruit. In most cases these trees 

 would blossom heavily, but any fruit that was able to set would 

 soon be punctured by the bug and either drop to the ground or 

 develop into a gnarled or twisted apple. The damage to the 

 smaller twigs was also very apparent, a great deal of the fruiting 

 wood being severely damaged by repeated punctures and covered 

 with scars resulting therefrom. Much of the young growth had 

 been killed outright. The past was now becoming similarly in- 

 jurious in the Golden Russet orchard and, while the damage to the 

 twigs had not here reached such a state as in the older trees, the 

 crop was gradually and steadily being destroyed. Finally, the 

 bug was rapidly gaining a foothold in the remaining part of the 

 orchard, though the infestation was far from being as severe as in 

 the rest. 



The whole orchard, with the exception of the smallest part 

 mentioned above, which was sprayed by the owner, was treated 

 for Green Apple Bug, nicotine sulphate (blackleaf 40), 1 pint to 

 100 gals, being used. In the spray immediately before the blossoms 

 opened, this was combined with lime sulphur and arsenate of lime. 

 In the after-blossom spray, the fungicide was sodium sulphide 

 ("soluble sulphur") and the arsenical poison was omitted. All 

 our attention was concentrated on spraying for the bug, and when 

 weather conditions were such that injury from the application 

 of th€ fungicide seemed likely, it was omitted from the spray. 

 A "Friend" spray gun was used throughout the work, as this in- 

 strument proved more efifective than the ordinary nozzles. 



On the Golden Russet orchard and on the Gravensteins in the 

 large orchard, the spray was applied under ideal conditions and 

 resulted in the practical elimination of the bug. A few might still 

 be found in the tops of the trees, but their number was insignificant 

 and they were able to accomplish little damage. In the remainder 

 of the old trees, trouble with the outfit resulted in considerable de- 

 lays, and most of this block failed to receive the first and most 

 important spray, so that it was only with great difficulty and by 



