90 



THE CANADIAN HORTICULTURIST. 



certed action as proposed in the report of 

 our committee. 



In addition to the trapping with bands, 

 each grower should faithfully practise spray- 

 ing- with Paris green, for by this means he 

 will destroy a large number of the worms in 

 June before they begin their destructive work. 



Slingerland says on this point : 



" Facts and observations lead us to believe that 

 in applying a poisonous spray soon after the blos- 

 soms fall, we deposit some arsenic in the calyx- 

 cavity where nature kindly takes care of it for us 

 until ten days or two weeks later when the little 



tion must be made soon after the blossoms fall, 

 when the calyx is open, as shown in figure 1746. 

 If we wait a few days until the calyx has closed it 

 will be too late. We can conceive of no possible 

 way in which a majority of the 15 or 20 per cent, 

 of the worms which enter the fruit at some other 

 point in the spring, and all of the worms of the 

 subsequent broods, can be effectively reached with 

 tne poison spray.'' 



Experiments made by Forbes & Lodeman 

 go to prove that as a rule two sprayings are 

 sufficient, one just after the petals fall and a 

 second a week later. 



With pears the spraying appears less 



Fig. 1748. Just right to spray. A pear and two apples from 



which the petals have recently fallen. Note that the calyx lobes 



are widely spread. Copied front Cornell Bulletin. 



apple-worm includes in it the menu of his first few 

 meals. Furthermore, this poisoning of these 

 young worms which enter the developing fruit in 

 the spring, seems to be the only way and the only 

 time that the insect is or can be the most success- 

 fully reached with the spray ; as the worms some- 

 times eat through into the calyx-cavity from the 

 outside at the base of the lobes, and as some of 

 the poison often lodges here, possibly a few of 

 them get enough poison to kill them at this point. 

 Not enough of the spray can be made to stay on 

 the surface of the fruits then or at any subsequent 

 time to reach one in a hundred of the worms which 

 enter elsewhere than at the blossom-end. Put in 

 another way, the above facts mean that we can 

 hope to reach with a poison spray only those apple 

 worms which enter the blossom ends of the form- 

 ing fruits in the spring. To do this, the applica- 



effective than with apples, perhaps because 

 it is the second brood does them the most 

 injury, and this brood, whether on pears or 

 apples, cannot be reached to any great extent 

 with poison spray. Slingerland thinks that 

 with thorough work we can often save at 

 least 75 per cent, of the apples that would 

 otherwise be ruined by worms, and for those 

 which escape and from the nucleus for the 

 second brood, there is no better plan than to 

 trap as many as possible with the banding 

 svstem. 



