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prevent its spread into the large commercial orchards, and this was 

 "being attempted by spraying in the affected districts. 



Mr. Lochhead stated that in Ontario one brood only of the moth 

 exists east of Toronto, while two broods are present annually west of 

 that point; he considered spraying essential in the eastern section, 

 and spraying and banding the trees with burlap to be most satisfactory 

 in the western part of the district. The chief difficulty was that many 

 of the orehardists failed to examine the burlap bands regularly and 

 carefully, and in this way many of the moths developed and escaped. 

 In answer to a question of Mr. Sanderson as to the cause of the dif- 

 ferent number of broods, he replied that the climate of Ontario was 

 peculiar, inasmuch as the two districts alluded to were located in 

 different life zones, and that this fact would undoubtedly explain the 

 difference in the number of broods. 



Doctor Fletcher did not think it advisable to leave check trees in 

 experimental orchards — there were only too many orchards which were 

 not sprayed which could be used for comparison — and recommended 

 spraying five times, but stated that where he had sprayed only twice 

 in eastern Canada fairly good results had been obtained. He expressed 

 the opinion that many apply the first spraying too early and that it is 

 not necessary to make this treatment until a full week after the blos- 

 soms have fallen. During this season a severe drought had apparently 

 checked the damage done by this insect in eastern Canada. The 

 second brood was the most difficult to treat, and he had advised spray- 

 ing in the East and the use of burlap in addition to spraj 7 ing in the 

 West, as had been stated by Professor Lochhead. 



Mr. Gillette remarked that this insect passed the winter in the lar- 

 val stage and that he had never discovered it in any other condition 

 at that season of the year. 



Mr. Piper spoke of the conditions in the State of Washington and 

 expressed the opinion that the destructiveness of this insect depended 

 largely on the life zones in which it was found. There were still 

 many problems concerning it to be solved. In the valleys where the 

 San Jose scale existed in many of the orchards the codling moth was 

 also present. He had advised four or five sprayings and stated that 

 Mr. Aldrich believed that there are three broods of the moth in some 

 parts of the State. 



Mr. Sanderson said that the insect was somewhat variable in regard 

 to the number of broods in Delaware and that he had been able to 

 demonstrate that in some cases only one brood existed. He found 

 that larvse collected August 10 had passed the winter without pupat- 

 ing. In Texas this insect was very destructive to pears in the vicinity 

 of El Paso. 



Mr. Gillette reported having found the second brood of moths as 

 earty as July 12 in Colorado, at Grand Junction, and Mr. Cooley had 

 concluded from his experiences in Montana that there were two broods 



