138 THE CANADIAN ENTOMOLOGIST 



in the plots receiving spray 2 and 3 together they averaged 22.1 

 per 100 buds, or the number of Bud-moths was reduced by 60.75 

 per cent. 



The infestation of Fruit Worms at the end of the first season 

 in the checks (unsprayed) was 12.44 injured apples per 100 picked, 

 while in the plots receiving spray 2 and 3 together there were 4.33 

 injured apples per 100 picked, or the injury by Fruit Worms was 

 reduced by 65.19 per cent. The second season, with a much lighter 

 infestation throughout the orchard, the benefit was 63.56 per cent, 

 reduction in Fruit Worm injury. 



The Codling Moth infested 4.54 per cent, of the apples in the 

 checks in 1913. It was found that spray 2 gave 71.3 per cent, 

 reduction in injury. Spray 3 gave 89.2 per cent, reduction, and 

 spray 4 gave 65.6 per cent reduction. From the fact that the 

 Codling Moth is, as a rule, an insect of minor importance in Nova 

 Scotia, and that it is largely controlled by sprays other than the 

 regular Codling Moth spray, the Nova Scotia apple growers are 

 free to advance or retard by two or three days the first spray 

 after the blossoms, as maybe advantageous to them in controlling 

 any other pest, with practically no reduction in benefit to Codling 

 Moth. 



The injury, done by the three insects under observation was 

 divided into two classes; the first, reduction in the set of fruit, 

 and the second, injury to the picked fruit. 



Effect of Bud-moth in Reducing Set 



In the Experimental orchard 59.56 per cent, of the blossom 

 buds in the checks contained Bud-moth. Counts of 1000 blossom 

 clusters infested with Bud-moth showed 305 apples set, while 1000 

 blossom clusters free from Bud-moth on the same trees set 1205 

 apples. In other words, the reduction in set in the blossoms 

 infested is 75 per cent., or in the checks where the infestation was 

 59.56 per cent, the reduction in set was approximately 45 per cent. 

 By the use of spray 2 and 3 we reduced the number of Bud-moths 

 by 60.75 per cent., so instead of growing 55 apples where 100 would 

 have set if no Bud-moth had been present, we increased the set to 

 82, or an increase in set of 49.09 per cent. 



