1910 ENTOMOLOGICAL SOCIETY. 91 



(sufficient were present to have punctured numerous aj)ples even t'nough the per- 

 centage thus injured might not have been high, ^loreover^ the season was very 

 dry and the OMaier had sprayed the whole orchard, check and all, very heavily 

 for Codling Moth. Much of this spray was still on the check trees at the time 

 of the first application to the rest of the orchard. This together with the narrow 

 width of the check strip and its closeness to tho sprayed trees was sufficient to 

 account for the destruction of the flies on the check. 



In 1915 we sprayed a small orchard in Simcoe village, near which were other 

 infested trees. The season was wet and seven applications were given, but in 

 spite of these approximately 60 per cent, of the Tolmans, 30 per cent, of the 

 Snows and 15 per cent of the Spies were punctured. These results showed that 

 one could not hope to control the pest by spraying in a town without treating 

 all trees for many rods on every side; especially would this l)e true if there were 

 high Avinds to help in the dispersal of the insects. 



We also sprayed in 1915 all of a small, isolated orchard at YiUa Xova, which' 

 had been badly infested the previous year and most of the fruit of which had 

 been left on the ground. 



Eesult : Though the crop was very light, thus making it harder to protect^ 

 and though only two applications were given, which certainly were not sufficient 

 for so wet a season, approximately only 12 per cent, of the fruit was infested; 

 which was very encouraging. 



In 1916 we sprayed with the sweetened poison two adjoining orchards on 

 one side of the road at Lyn, near Brockville, and left another orchard about twenty- 

 live rods away as a check. There was a hedge and also a house and barn situated 

 between this orchard and the sprayed ones. On the opposite side of the road we 

 sprayed a third orchard and left a check adjoining it and in the same direction 

 as the other check. Two sprays were given. Many flies were seen in the sprayed 

 orchards after the first spray and some during it. 



Result : The two first-mentioned orchards had 95 per cent, or more of the 

 fruit, including such susceptible varieties as Tolman, Wealthy and Snow, free from 

 punctures, though most of the fruit the previous year had been so badly infested 

 it was left on the ground to rot. The orchard on the opposite side of the road 

 was not so clean, some of the Tolmans having as high as 25 per cent, of punctured 

 apples, though most of these apples had only one or two punctures. The check 

 orchards on both sides of the road showed that the Tolman, Snow, Wealthy 

 and St. Lawrence, had from T5 per cent, to 95 per cent, of punctured apples, most 

 of the apples having many punctures. 



In 1917 we sprayed these same three orchards again, and to protect the one 

 in which the results had not been quite satisfactory we sprayed a buffer area of 

 about fifteen rods between it and the check. 



Eesult : No punctures were found even on Snow, Alexander or Tolman, 

 in the orchard farthest from the check. In the second orchard on this side 

 of the road punctures were found on only one tree in the extreme north corner. 

 The third orchard, the one on which there had been 25 per cent, of punctured 

 Tolmans the previous year, was this year almost totally free from punctures, less 

 than two score being found in the whole orchard. In the check orchards Snow, 

 Wealthv and St. Lawrence and a heavily laden wild apple tree had almost every 

 apple punctured. There was practically no crop on the Tolmans in the check 

 orchard this year. 



In this same vear (1917.) we also sprayed a small, old orchard north of Trenton, 



