'62 PROTECTION OF PLANTS, 1921-22 



means must be taken to meet the demands of these problems. These are: "(1) 

 fundamental training for research must be insisted upon and its importance 

 emphasized; (2) an agreement as to which are the most fundamental problems 

 of research and which are the most promising methods of attack must be reached, 

 so that the available resources may be concentrated; (3) a workable plan for 

 co-operation among entomologists, with other scientists, with public and private 

 agencies, and with the general public must be developed and supported." 



It is obvious that the economic entomologist should have a broad and fun- 

 damental training along all biological lines and many other sciences for the science 

 of Economic Entomology is intimately related to man}^ others. Moreover, 

 there is a need for more oi-ganization, co-operation and co-ordination, with 

 regard to the whole question of research; but perhaps the greatest need at the 

 present time is a workable plan of co-operation, which should include: (a) Co- 

 operation among entomologists themselves so that workers interested in similar 

 problems may meet together in conference frequently and "pool resources"; 

 (b) Co-operation between entomologists and other scientists in order that inter- 

 Telations may be more closely studied; (c) Co-operation with industrial con- 

 cerns and other private agencies so that their support may be enlisted; (d) Co- 

 operation with the public in insect control through the state, and county farm 

 bureaus and other associations which are in intimate contact with the farmers. 



To carry out such a plan of co-operation is a tremendous undertaking, but 

 undoubtedly it can be done if the necessary organization can be brought into 

 play. It cannot be done by one man but by a group of unselfish, optimistic and 

 practical men imbued with the larger spirit of co-operation for the national 

 welfare. 



SOME INSECTS INJURIOUS TO SHADE TREES IN QUEBEC 

 By Prof. George Maheux, Provincial Entomologist 



Parasitism in its widest sense is the expression of a fundamental biological 

 law, otherwise the co-existence of so many kinds of all classes could not be poss- 

 ble, it seems, and keep its wonderful order; it could not keep the perfect balance 

 of the ever-acting forces without the eternal renewal of what the inimitable 

 Fabre calls the "le savant brigandage des etres." The Creator is still presiding 

 over the harmonious co-ordination of his work. In the enormous field of living 

 things where the struggle for life knows no armistice, insects, along with micro- 

 bes, play a most important part on account of their enormous numbers, their 

 devouring activity, their marvellous vitality, and their prolificacy. There are 

 half a million known species of insects and probably as many more to be dis- 

 covered. Those who have experienced the power of destruction of these little 

 animals cannot ignore their power as agents of disintegration in the world. 



In their destructive rage insects attack both animals and plants, and as 

 m^any of these are in some way useful to man, insects are arrayed against man 



