54 THE REPORT OF THE No. 33 



The work that is being done by the United States Department of Agriculture 

 adjacent to the New York border is to assist in establishing a barrier zone. 

 The work they are doing south of the international boundary will assist you. 



If colonies of the gipsy moth are allowed to become established in Canada 

 on the New York border, the possibility of successfully ending the barrier zone 

 work that has been attempted will be an effort in vain. 



We, therefore, ask your co-operation. 



In reply to questions, Mr. Mclntyre stated that scouting, to be effective, 

 should cover a territory of at least a 30-mile radius from the last infestation 

 found. It was formerly supposed that wind-drift was limited to 12 miles, but 

 this is now thought to be low and that the 30-mile distance is necessary in 

 careful scouting. He estimated that scouting in Quebec area would cost at 

 least $20 per lineal mile of road, in addition, of course, to the overhead. The 

 border scouting along the New Hampshire line should embrace a strip 30 miles 

 wide. He further stated that in scouting, with remarkably few exceptions, 

 solid blocks of woods are not infested till after the isolated and scattered trees 

 in the margin of the block are fairly generally infested. 



The meeting then adjourned and the discussion was continued after lunch, 

 as follows: 



Dr. Swaine: The question of the distribution and spread of the gipsy moth 

 is exceedingly interesting to us in Canada. We should do everything we can 

 to prevent it entering Canada and becoming a nuisance to our neighbours. 

 How would the United States view the failure of Canada in their work to prevent 

 the gipsy moth becoming well established along our southern border? How 

 would that affect work in New York State? 



Mr. McIntyre: I would say that if Canada did not undertake the pro- 

 position of keeping down the infestation adjacent to the New York border, our 

 attempt to establish a barrier zone in New York will be useless. No doubt 

 many consider that New York is a large state and a wealthy one. I doubt that 

 there is a state that would finance an extermination campaign over an area as 

 great as that of New York State. The gipsy-moth campaign will undoubtedly, 

 however, be continued, but if our attempt to establish a barrier zone is not 

 successful, the problem would be carried on as an individual one, the property- 

 owners themselves financing whatever work was undertaken. The attempt to 

 establish a barrier zone is the first attempt of controlling the gipsy moth in 

 this manner. 



In a paper which I read this morning, I mentioned the amount of money 

 expended in the State of Massachusetts for gipsy-moth work in approximately 

 one-half the area of the State. The money that has been spent by the Federal 

 Government in New England has been principally to establish a quarantine 

 line to protect as much as possible the remainder of the country by preventing 

 the shipping of infested material from that area to outside uninfested areas. 

 The amount of money that they have received for this work has not been 

 sufficient to attempt to carry on an extermination campaign. 



At the present time the area in which the barrier zone work is being con- 

 ducted under the direction of the United States Department of Agriculture and 

 the New York State Conservation Commission, comprises approximately a 



