In northeastern Ontario, Ivanhoe Provincial Park and a 

 portion of Missinaibi Provincial Park, both in the Chapleau 

 district, were sprayed with the objective of keeping the 

 trees green. Approximately 3,000 acres were sprayed at 

 Ivanhoe, and 8,000 acres along the southern side of Mis- 

 sinaibi Lake, with one application of fenitrothion at 4.3 oz. 

 per acre. 



In southeastern Ontario, 800 acres of valuable white 

 spruce plantations were sprayed in the Larose Forest to pro- 

 tect the trees against further damage, and if possible, to 

 achieve control of the infestataion. The objective was 

 reached despite an unexplained failure of the first attempt, 

 making necessary a complete second spraying almost 10 

 days later. The final spraying was a 5.6 oz. of fenitrothion 

 per acre, with the core area of 80 acres receiving two ap- 

 plications, each at the 5.6 oz. rate. 



Operations to control the white pine weevil totalled 4,300 

 acres. In the Sault Ste. Marie district, 2,200 acres were 

 sprayed by air using methoxychlor at 2.5 lbs. per acre. 

 Weevil damage was reduced by almost 75 per cent. The 

 remaining 2,100 acres, in the Kemptville, Tweed and Lake 

 Simcoe districts, were treated by spraying with portable 

 sprayers, and by hand-clipping and burning infested leading 

 shoots. 



Almost 5,000 acres of pine and spruce 

 sprayed for control of sawflies, including 

 pine sawfly, the European pine sawfly, the 

 and the yellow-headed spruce sawfly. 



The Department continued to make 

 through field collections, to build up a su 

 used to control the European pine sawfly. 

 spread infection by the virus, most of thi 

 tributed free of charge to interested p 

 owners. 



plantations were 

 the red-headed 

 ack-pine sawfly, 



a special effort, 

 pply of the virus 

 To obtain wide- 

 s material is dis- 

 rivate plantation 



Almost 500 acres of sod-covered sites were treated at the 

 time of tree planting for control of white grubs, and 900 

 acres of similar sites were treated for control of mice where 

 these pests threatened the survival of young plantations. 



The major tree-killing disease in the forests of Ontario is 

 the white-pine blister rust. A substantial control program 

 has been in progress for several years to protect the trees in 

 specific areas managed for production of white pine. The 

 disease is controlled by using the herbicide 2,4, 5-T as a spot 

 spray to kill the other plants (wild currants and gooseberries) 

 necessary in the disease's life cycle. In 1970, approximately 

 4,000 acres of high-value young pine stands were protected 

 against the rust in parts of the Sault Ste. Marie, Pembroke, 

 Lindsay, Tweed and Kemptville districts. 



The entrance of annosus root rot into southern Ontario 

 plantations is prevented by the application of sodium nitrite 

 solution to the freshly cut stumps during thinning opera- 

 tions. In 1970, about 1,500 acres were treated in this way. 



COMMUNICATIONS 



The change-over of the High Frequency Radio System to 

 Single Sideband continued throughout 1970. A total of 26 

 additional aircraft SSB transceivers (100 watts output on 10 

 channels) were purchased and installed early in 1970 in all 

 remaining Turbo Beavers lacking SSB facilities. Additionally, 

 all 10 piston engine Otters were installed with the SSB 

 equipment as well as VOR navigational equipment. The 

 entire fleet of 40 aircraft is now SSB and VOR equipped and 

 some have DME (Distance Measuring Equipment) Trans- 

 ponders and Radar. 



A one kilowatt 8 channel SSB base station was put into 

 service at Maple as a local control operation prior to it 

 being remotely controlled from the Parliament Buildings 

 Communication Centre in downtown Toronto 20 miles dis- 

 tant. Aside from the main transmit.'receive facility, this sys- 

 tem includes six individual stand-by receivers and a tone 

 operated remote control console. Radio communication is 

 provided to all field office points. 



A large quantity of VHF walkie-talkie sets were supplied 

 from the provincial fire-cache to the field offices, and the 

 cache replenished by a purchase of 145 more. 



Telex continues to carry the load of communications be- 

 tween Head Office and the field offices with 30 machines 

 being operated in 1970. Due to the increased traffic load 

 and number of multi-point messages, some manually oper- 

 ated machines were changed to perforated-tape automatic 

 operation. 



AIR SERVICE SECTION 



The Section currently maintains a fleet of 40 aircraft, oper- 

 ated out of 24 bases, to meet flying requirements of the 

 Department and special needs of other Government 

 departments. 



Five Bell 47C4 model helicopters were leased for varying 

 periods during the year to provide transportation in forest 

 fire fighting and other Department operations. 



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