Control The majority of operations in the direct control of insect infestations 

 have been conducted from the ground with hand equipment in the pine, spruce 

 and larch plantations of southern Ontario. However, in 1961 over 400 acres of 

 30-year-old white pine plantations in the Kirkwood Management Unit, Sault Ste. 

 Marie District, were sprayed from the air with DDT to control the white-pine 

 weevil. The operation gave almost 100% control on the areas sprayed. Increas- 

 ing attention is being devoted to control of weevil in natural stands containing 

 young white pine. In total, more than 7,000 acres were treated by spraying or 

 leader clipping for control of the white-pine weevil. 



Spraying for control of various species of sawflies, principally the red-headed 

 pine sawfly, the European pine sawfly, the yellow-headed spruce sawfly and the 

 larch sawfly, covered a total of 2,300 acres. A virus disease as well as DDT is 

 used to control the European pine sawfly. 



Almost 500 acres of new plantations were treated with Aldrin for control 

 of white grubs, and an equal acreage of plantations was treated chemically for 

 mouse control. 



Direct control of tree diseases was confined to the white-pine blister rust. 

 The chemical 2,4,5-T is used to eradicate the disease's alternate host plants, wild 

 currants and gooseberries, from the immediate vicinity of the pines. Each year 

 a portion of a long term program is completed, and in 1961 almost 7,000 acres 

 were protected against blister rust in important pine producing areas in the 

 North Bay, Pembroke, Lindsay, Tweed and Kemptville Districts. 



Radio Communications 



Traffic totals were down slightly in 1961 from the previous year, the 

 province-wide network having handled 88,969 messages totalling 2,270,681 

 words. Four new stations were added to the system being located at Wrong 

 Lake, Samuel de Champlain Park, Orono and Angus. 



Seventy-eight VHP radiotelephones were purchased and installed in depart- 

 ment vehicles; sixteen more model P35 fire-base radiotelephones were manu- 

 factured by department staff and distribution made to field offices. New test 

 equipment consisting of signal generators, power output meters and crystal cali- 

 brators was provided to all field communication technicians in accordance with 

 a plan for standardization of service and repair. 



The following types and quantities of radio equipment constituted the 1961 

 inventory: 



Tower Radiotelephones 407 



Mobile Radiotelephones (H.F. & V.H.F.) 370 



Marine Radiotelephones 12 



Portable Radiotelephones {V^ watt) 277 



Portable Radiotelephones (2^2 watt) 111 



Portable VHF Walkie Talkie 



Radiotelephones 109 



Portable VHF Radiotelephones (2 watt) 125 



P35 Fire-Base Radiotelephones 94 



30 Watt H.F. Ground Radio Stations 105 



75 Watt H.F. Ground Radio Stations 2 



100 Watt H.F. Ground Radio Stations 3 



150 Watt H.F. Ground Radio Stations 8 



300 Watt H.F. Ground Radio Stations 2 



500 Watt H.F. Ground Radio Stations 8 



15 Watt V.H.F. Ground Radio Stations 75 



50 Watt V.H.F. Ground Radio Stations 



(including V.H.F. attachments for 30 watt 

 Ground Stations above) 74 



Aircraft Radio Installations 44 



Aircraft Ground Hailers 20 



Total 1,846" 



137 



