184 
TREES AS GOOD CITIZENS 
ness. Proper care and attention on this point are essen¬ 
tial, and immunity from damage to highly prized trees is 
cheaply purchased by the application of adequate safe¬ 
guards and remedies. The real expense lies in neglect. 
Inspection of the trees from time to time is an impor¬ 
tant part of insect control. Careful examination some¬ 
times results in the discovery of insects which have not 
yet caused visible damage, and since early action is most 
effective, this discovery may save much trouble. In a 
community which has a tree warden or other shade tree 
officials inspections should be made as a part of the 
routine work. 
In a single volume it is not possible to discuss in detail 
every insect enemy encountered in all parts of a country 
as large as the United States. The most that may be 
attempted is to treat of those which are most common 
and general in their distribution, to show how these in¬ 
sects and their work may be identified, and to point out 
the remedies which have been found most effectual. 
Supplementary information may be obtained from state 
entomologists. Every state and territory maintains a staff 
of technical experts and research workers whose function 
it is to gather and distribute information as to the insects 
prevalent within that particular field. Similar work is 
carried on in even more elaborate fashion by the Bureau 
of Entomology of the United States Department of 
Agriculture at Washington. Specific inquiries through 
either of these channels will bring detailed information 
on local conditions which will often prove helpful. 
In communities where there is an efficient shade tree 
commission, tree warden, arboriculturist or other author¬ 
ity charged with responsibility for shade tree development, 
these questions will receive more immediate and more 
localized attention if placed before the proper official. 
