150 V/att Ground Radio Stations 7 



300 Watt Ground Radio Stations 2 



500 v;att Ground Radio Stations 8 



Aircraft Radio Installations 44 



Aircraft Ground Hailer Units 19 



Forest Insect and Disease Protection 



Continuance surveillance of forest insect and disease conditions 

 is a major responsibility of this Division. 



Close co-operation is a requisite if success is to be attained in 

 insect and disease control since the work of several other Divisions, particular- 

 ly Timber Management and Reforestation, is directly affected. Control programs 

 in connection with white pine blister rust in Lindsay and Tweed districts and 

 European pine sawfly in the Lake Erie and Lake Huron districts were of this 

 nature. 



Control of the European pine sawfly is effected by the intro- 

 duction of a laboratory cultured virus disease to affected plantations. This 

 program was continued in the Lake Erie and Lake Huron districts. 



A scheduled control operation to combat the red-headed pine saw- 

 fly, a serious pest of red pine, in Kirkwood Forest, Sault St. Marie district, 

 was obviated by the extremely dry weather, which, combined with heavy natural 

 egg parasitism, greatly reduced the sawfly population. 



In addition, research projects carried on by Science Service, 

 Department of Agriculture (Canada) received our constant attention; programs 

 in connection with European pine shoot moth carried on at Northumberland 

 County Forest and Elmira, and the spruce budworm investigations at field 

 stations in Kenora and Port Arthur districts, being of particular import. 



Field staff of this Department continued to contribute to the 

 Forest Insect and Disease Survey, a project of Science Service, Department of 

 Agriculture (Canada). 



The gradual introduction of more intensive management practices 

 throughout the Province is placing ever-increasing emphasis on the biological 

 phase of this Division* s activities. 



- 4 - 



