800 



AMERICAN FORESTRY 



trunk, from a root disease, from mechan- 

 ical injury to roots or bark, from old 

 age, neglected wounds or a foreign 

 element in the soil. A personal examin- 

 tion, or a much closer description would 

 be required to make this advice more 

 specific. The remedy would vary with 

 the cause. 



This Should Not Be Done 



when a horse is hitched to a tree it is almost 

 certain that the tree will be injured 

 as is the one in the illustration. this 

 requires surgical treatment to save it 

 from disease and from rotting 



Q. Am sending you small pieces of 

 pine for examination. They appear 

 to have small drops of sap upon them, 

 but when this sap is opened you will 

 find from one to four small red bugs. I 

 have ordered the tree cut and burned, 

 but am afraid it is something that 

 might spread to the other trees. What 

 can be done to combat this evil? D. 

 C, Brooklyn, N. Y. 



A. The specimens of pine branches 

 sent showing masses of pitch containing 

 small yellowish insects have been ex- 

 amined. This is commonly met with 

 at this time of the year on scrub and 

 other pines. It is due to the pitch 



maggots which are the larvae of small 

 gnats belonging to the family Ceci- 

 domyidae. The insects only occur for a 

 short period and as a rule do no damage 

 to the trees. You are not justified in 

 cutting down trees on account of the 

 presence of this insect, or going to the 

 expense of any other treatment. 



Discussion of the following questions 

 is requested by the readers of American 

 Forestry, and expressions of opinion, 

 addressed to the Editor of this Depart- 

 ment, will be appreciated. 



1. How shall we determine what 

 sections of a city should be included in 

 the ' ' Treeless Zone ? " To what extent 

 should business houses and commercial 

 traffic across footways influence this? 



2. What can be said for and against 

 the following practically untried trees 

 for street and highway purposes ? 



(a) Kentucky Coffee Tree (Glym- 



nocladus dioicus). 



(b) Willow Oak (Quercus phellos). 



(c) Hackberry (Celtis occidentalis) . 



(d) Yellow Wood (Cladrastus lutea) . 



(e) White Ash (Fraxinus Ameri- 

 cana). Consideration of these species 

 is invited with special reference to use 

 in latitudes between New York and 

 Richmond. 



Q. We have here 20 acres of woods, 

 containing pine, chestnut, maple, birch, 

 oaks, etc. Many of these are fine large 

 trees, but the woods have been neglected 

 for many years. We are anxious to 

 improve and beautify them. The sun 

 has not reached the ground in these 

 woods for a generation and I wish you 

 would send me your advice as to clearing 

 them for beauty, not for commercial 

 uses, citing the best article or book for 

 the care of such a small, valuable wood. 

 -R. G. D., Whitinsville, Mass. 



A. To care for the woodlot in order 

 to promote its greatest aesthetic value, 

 we would suggest the following treat- 

 ment : 



Mark all the dead and diseased trees 

 in the fall before the leaves drop and 

 remove them in winter. See that the 

 ground is free from brush and logs, 

 but do not disturb the young growth and 

 leaf mold on the ground. Remove the 

 poor specimen trees that absolutely 



