252 
INDEX 
Harding Plants Memorial Trees, no 
Harmony essential in street planting, 68 
Hawthorns for roadside planting, 94 
Health factors, Shade trees as, 21 
Heart-rot, Red and white, 174 
Hickory, Characteristics, range and adap¬ 
tability of Shagbark, 105 
Principal insects which attack: Walnut 
caterpillar, 209; Gipsy moth, 209; 
Hickory bark beetle, 209; twig gir- 
dler, 210; gall aphis, 210 
Highway planting, 115 
On Lincoln, Illinois, 118 
Hilgard Chestnut, The, 125 
Historic trees, Famous, 122 
Honey Locust, 67 
Principal insects which attack: white- 
marked Tussock moth, 210; Twig- 
girdler, 210 
Hooker Oak, Sir Joseph, 123 
Horse-bites, Injury from, 134 
Horse chestnut, 30, 64 
Principal insects which attack: White- 
marked Tussock moth, 210; Leopard 
moth, 210; Oyster-shell scale, 210 
Horse chestnut and Buckeye, Differenti¬ 
ating characters between, 30 
How fungus lives and grows, 173 
How to choose nursery stock, 77 
How to detect gas leaks, 167 
How to fill cavities, 162 
How to identify shade trees, 27 
How to prune, 146 
Huntington Elm, 51 
Identify Shade Trees, How to, 27 
Illuminating gas menaces shade trees, 
166 
Importance of central control in shade 
tree work, 226 
Influence of street in shade tree valuation, 
232 
Informal type of street planting, 73 
Injury to street trees, Sources of, 149 
From industrial wastes, 170 
From freezing, 154 
From overhead wires, 150 
Insect attacks, Anticipating, 225 
Insect pests, Municipal treatment of, 185 
Insecticides, Contact, 187 
Insects and Mites, Gall, 215 
Insects and their control, 183 
Insects, boring, 197 
Leaf-chewing, 198 
Sap-sucking, 197 
Various types, 186 
Inspection of trees, Necessity of regular, 
184 
Intrinsic value of shade trees, 25 
Investment, Shaae trees an, 24 
Tree planting an, 239 
Irrigating shade trees, Methods of, 132 
Irrigation and drainage of street trees, 84 
Japanese Walnut for roadside planting, 105 
Judicial computation of damage to shade 
trees, 234 
Kentucky, Naturalization Tree in, 121 
Kermes, Pubescent oak, 217 
Knot, Black, 176 
Kerosene emulsion spray, Uses of, 189 
Formula for, 190 
Labelling shade trees, 127 
Necessity of, 130 
Labels, Methods of attaching tree, 124 
Types of, 128 
Lace Bug, Sycamore, 221 
Lafayette Trees, 123 
Landscape value of trees in supplement¬ 
ing memorials, 108 
Large Elm sawfly, 205, 218 
Laurel Oak, 48 
Law, Shade trees and the, 240 
Lawns, Shade trees planted on, 233 
Laws penalizing tree damage, State, 233 
Laws protect groves and orchards in 
California, 97 
Lead, Arsenate of, 188 
Leaf blight, Effect of, 180 
How to prevent, 180 
When to spray for, 180 
Leaf chewing insects, Work of, 187 
How to control, 198 
Leaf curl, How to control, 181 
Leaf Scorch, How to control, 182 
Leaks, Gas, 166 
Legal regulation of tree operators, 157 
Legal value of shade trees, 231 
Legislation, Shade tree, 240 
Leopard Moth, 206, 212, 216 
Liberty Oak, 124 
Limbs, Bolting, 159 
Lime, Arsenate of, 188 
Lime-Sulphur Sprays, Uses of, 189 
Lincoln Hackberry, The, 123 
Lincoln Highway Association planting, 
117 
Lincoln Trees, 123 
Linden, American (or Basswood), 40, 52 
Borer, 210 
European, 40, 53 
Live Oak, 47 
Local conditions affect local tree legisla¬ 
tion, How, 245 
Local cooperation in shade tree work, 245 
Locating roadside trees properly, 94 
