In addition to this precaution, trees and plants from certain countries 

 are inspected by officers of the Division, either at the port of entry 

 or at the destination of the shipment. 



The powers which the Act gives to eradicate pests which have 

 already been introduced into Canada are being used in Nova Scotia 

 and New Brunswick, where an active campaign is being carried on 

 by the Division against the Brown-tail moth, which has recently 

 spread into these provinces from the Xew England states. 



In addition to the work of inspecting and fumigating imported 

 trees and plants and the Brown-tail moth control work, the Division 



^$i 



The open-air insectary, Experimental grounds at Ottawa. 



of Entomology also carries on many other lines of work. These 

 include the study of insects and the means of control both natural and 

 artificial. As insects are intimately related to agriculture, horticulture 

 which includes fruit growing, forestry, public health and other 

 activities of man, the extensive field such studies cover will be 

 understood. The importance of this work is indicated in the annual 

 toll levied on the farm crops of Canada by insects which is estimated 

 to be at least fifty million dollars. To this must be added at least forty 

 million dollars of an annual loss to the fruit crops of the Dominion 

 from insect injuries besides enormous and inestimable losses from 

 similar causes that have to be borne by the timbered areas of the 

 country. 



In the carrying on of its work the Division of Entomology 

 co-operates with other branches of the Government service and 



