28 PROTECTION OF PLANTS — 1923-24 



two moths imported from Massachussetts through the co-operation of the 

 United States Bureau of Entomology, and liberated at strategic points in the 

 provinces of Nova Scotia, New Brunswick and Quebec, were: Apanteleslac- 

 tiecolor 'o7, 500 ;Compsilura concinnata 30,725, and Caloso77ia sycophanta, 4,200. 

 The importation of these enemies of the Gipsy and Browntail moths was dis- 

 continued in 1917, in order that more recovery work of the enemies intro- 

 duced might be undertaken. The parasites mentioned have undoubtedly 

 become established in eastern Canada, as thej^ have been recovered on several 

 occasions; the Calosoma has also been recovered. 



Aid to Greater Production Campaign 



The greater production campaign inaugurated by the Government during 

 the Great War was aided considerably by entomologists throughout Canada, 

 through lectures, correspondence and publications. A special series of articles 

 of value to citizens engaged in war-garden work was prepared at Ottawa and 

 given to the press at timely intervals. The late Dominion Entomologist, 

 Dr. G. Gordon Hewitt, personally took a keen interest in the protection of 

 stored grain from rats, mice and insects, and also prepared, for the Food 

 Controller, a statement, issued in leaflet form, instructing householders as to 

 methods of keeping, breakfast foods and other products kept in store free from 

 insect enemies. The federal Entomological Branch issued a series of circulars 

 on important pests which were called "Crop Protection Leaflets." During 

 this time too, the Branch adopted the slogan, "Crop Protection means Crop 

 Production". The late Dr. Hewitt also prepared a leaflet entitled, "The 

 Suppression of Two Insects affecting Troops", which was issued by the Depart- 

 ment in 1913 for special distribution among the Canadian Expeditionary 

 Forces. 



Greenhouse Insect Investigations 



At Ottawa and Vineland, studies have been undertaken of a number of 

 the more important greenhouse insects, and a special bulletin on the subject 

 was published in 1923. 



Other Investigations. 



Studies of insects affecting stored products, live stock, man and his personal 

 belonging, etc., have also been investigated at Ottawa as opportunity offered. 

 Fruit insect investigations, insecticide investigations and natural control 

 investigations, have been specially conducted at certain field laboratories during 

 the past decade and reference to such investigations will be made under the 

 provinces in which they were undertaken. 



