212 JOURNAL OF FORESTRY 



less sketched its life history. Sometimes they have devised or pro- 

 posed methods of combating it. In spite of all this, the fact remains 

 that, up to the present, little more than a few poorly conducted experi- 

 ments in control work have been carried on and these, not in- 

 frequently, with indifferent success. For this situation there are 

 several good reasons. 



In many cases the work done by the specialists is in most miserable 

 shape for use. Items and fractions of information have been rushed 

 into print here and there and never properly assembled. The spe- 

 cialist can readily run down existing data with his card-indexes, but 

 the rest of us cannot. 



Very frequently the specialist has not completed his work, having 

 failed to determine such essential items as the enemies of his particular 

 pest or the viability of spores. The very common disinclination of 

 specialists in a given line to use a uniform method of reporting 

 further clouds the situation. 



Often the specialist, having written up something of a life history 

 and having suggested one or more methods of control, considers that 

 he can have no further interest in the matter since he has now covered 

 the scientific field and all that can remain is for the interested parties 

 to follow out his suggestions and find relief. Not infrequently the sug- 

 gested control measures are out of the question on economic grounds. 

 Concerning such grounds the specialist can have little judgment. 

 Other control measures that are perhaps practical may be devised. 



If a logger is losing timber from the attack of a bark-beetle it 

 may not be helpful to him to learn that he can kill the beetles if he 

 will locate all infested trees in August and in September burn the 

 tops over the stumps and soak the logs in water for a week. The 

 logger is not apt to try all that, even if it is the only known treatment 

 which will be effective. Somebody must be prepared to undertake 

 the location of the trees and the cutting and barking and burning. 

 He must be able to take a cruise through the woods, rough up some 

 estimate as to the numbers of infested trees, check up on identities, 

 verify the essentials of life history, estimate costs and plan a crew 

 and a layout and explain it all to the logger. When the logger pro- 

 tests that he cannot move a few logs from here and there to water 

 for a week's soaking, he must be told that barking will do as well. 

 If the logger still protests against the costs, such matters as the rate 

 of deterioration of peeled logs in the woods, stumpage values, annual 



