334 
Insect injury, 18, 26, 36, 49, 52; see 
also Insect pests 
Insect lime, see Dendrolene 
Insect pests, periodic development, 
45; various groups, 46; character 
of damage inflicted, 46; precau- 
tions against, 54; combating in 
cities, 54, 131-133; natural ene- 
mies, 129; methods, 133; mechani- 
cal destruction of, 144; in parks, 
195; also 197, 206, 215 
Insecticides, 125, 134, 146; see also 
Bordeaux mixture; Soap solution; 
‘Tobacco 
Insects, biting, 134, 135; sucking, 
134, 142; obnoxious to tree 
growth, 149 
Iron, deficiency in soil, 62 
Ironwood, Osirya, 192, 212, 293, 365, 
307 
Itea, 352 
Ithaca, N. Y., trees killed in, 142 
note 
Japanese Quince, Pirus, 297; seé also 
Strawberry-bush 
Japanese Storax, 355 
Japonica, Pirus, 297; see also Straw- 
berry-bush 
Jasmine, Philadel phus, 354 
Judas Tree, Cercis, 111, 211, 280, 
307 
Juglans, Walnut, 210, 257, 250, 
260 
June bug, 155 
Juneberry, Amelanchier, 111, 211, 
273, 309, 370, 372 
Juniper apple, 38; see also Rusts 
Juniperus, Pencil Cedar, 209, 215, 
219, 220, 371-373 
Kainit, see Potash fertilizers 
Kalmia, Laurel, 293, 331, 332, 365, 
366, 369, 370, 372 
Kentucky Coffee Tree, 256 
Kerosene emulsion, 50, 134, I4t, 
142, 150, I5r, 155 156, 160 
Kinntkinnik, Cornus, 282 
Kirkland, A. H., quoted, 141 
Knapsack pumps, 138 ote, 147 
Knots, their causes, 14 
Kelreuteria, Varnish Tree, 210, 258,* 
261, 370 
Index 
Laburnum, Cytisus, 210, 259,* 261 
368, 370 
Lady-bugs, coccinellide, 131 
Lady Laurel, Daphne, 358 
Lagersiremia, Crape Myrtle, Fringed 
Myrtle, 328, 362, 368, 370 
Larch, 170, 177, 195, 209, 215; 
American, Larix, 230, 371; 
Golden, Pseudolarix, 210, 213, 220, 
230*; Japanese, Larix, 230; West- 
ern, Larix, 230 
Larch-moth, 166 
Larix, Larches, 209, 215, 229, 230, 
371~373; see also Pseudolarix 
Larvae, see Insect pests 
Laurel, Kalmia, 277, 332, 366, 360, 
370, 372; Mountain, 332; Sheep, 
332, 369; Swamp, 332 
Lawn trees, treatment of soil for, 77, 
conditions for planting, 173, 176: 
size, 178; contrasted with forest 
trees, 1893; also 1908 
Lead plant, Amorpha, 326, 346, 
366 
Leaf-beetles, 152, 155 
Leaf-eaters, 46, 54, 55 
Leaf-miners, 47, 165, 167, 229, 272, 
284 
Leaf-rollers, 47, 165, 166 
Leaf-suckers, 47 
Leatherleaf, Cassandra, 327, 332, 
366, 369, 371 
Leaves, development, 7, 10; part 
in evaporation and assimilation, 
17~19; breathing pores, 20; etiola- 
tion, 53, 58, 60, 62, 73; period of, 
204; color and form, 208; see also 
Foliage 
LEGUMINOSAE, Pea family, 345 
Lepidoptera, see Butterflies and 
moths 
Lespedeza, see Desmodium 
Leucothoe, North American Heathers 
333, 306, 367, 369-371; see also 
Zenobia 
Libocedrus, Arborvite, Incense Ce- 
dar, 209, 215, 221 
Lichens, excessive development on 
bark, 44; relation to disease, 53 
Life of tree, definition of term, 30; 
comparison with animal life, 30, 
31; causes contributing to length 
of, 31 
