NEW JERSEY 



Agricultural Experiment Stations 



BULLETIN 181 



MARCH 2, 1905. 



Insects Isjnrlons to Shade Trees and Ornamental 



Plants. 



BY 



John B. SmitHj Entomologist. 



Bulletin Jfo. 103, dealing with "some insects injurious to shade 

 trees," was published in October, 1894. The demand for it was so 

 great that the edition was soon exhausted, and since that time there 

 has been increasing demand for another publication covering the 

 same ground. 



During the last decade general interest in trees and ornamental 

 plants has inerfeased greatly. There are more village and town improve- 

 ment societies and more landscape gardeners, nurserymen and florists. 

 Several of our cities and towns have park commissioners, shade tree 

 commissions or some official whose duty it is to look after the trees 

 in the streets, parks or other open places in the municipalities. More 

 attention is now paid by individuals to their surroundings and, par- 

 ticularly where dwellings are set in open grounds, large or small, 

 intelligent effort is made to produce pleasing results. Shrubberies 

 and hedges have been and are being set out in greater number and 

 variety than ever before, and, as a rule, the plantations are kept in 

 good condition. 



City trees labor under disadvantages which are not always realized 

 by those who have them in charge. It is quite usual for the root 

 system to be largely cut off from connection with the surface; pave- 

 ments may come vnthin a foot or two of the trunk, leaving only 

 a small breathing space, and, as for the rest, the tree is expected to 

 get what nourishment and moisture it needs from the soil beneath 

 the covering of stone or concrete. It is not generally understood that 



