INDEX 



317 



Horticulture defined, 3 

 Hotbeds, construction of, 50 



use of, 50 

 Hybridization, 11 



Mendel's studies in, 8 

 Hydrangea, 305 



propagation of, 63 

 Hydrocyanic acid gas, 227 

 Hymenoptera, 225 



I 



Illuminating gas, by-products of, 290 

 Imperial Valley, reclamation of, 



145-147 



Improvement, process of plant, 7 

 Inarching, 81 

 Incidental products, 290 

 Information, market, 285 

 Inlaying, 80 

 Insect enemies of peach, 185 



groups, 224 



metamorphosis, 225 



pests of citrus, 199 



pests of currant and gooseberry, 

 214 



skeleton, 224 



structure, 224 

 Insecticides, exercise, 244 

 Insects and their control, 223 



as carriers of pear blight, 250 



as pollen carriers, 165 



control of vegetable, 89 



grape, 220 



injurious to apple, 182 



injurious to plums, 188 



mouth-parts of, 226 



study of, 243 



Inserting the bud, illustrated, 75 

 Inter-cropping in orchards, 128 



-fertile varieties of cherries, 175 



-grafting, 6 



-planting for pollination, 169 



-sterile, defined, 162 



-sterile varieties of cherries, 175 

 Irish potato, 95-98 

 Irrigation, acreage under, in United 

 States, 144 



and drainage, 142 



history of, 142 



importance of, 155 



in humid regions, 144 



in United States, exercise, 157 



Japan, flowering cherries of, 191 



use of Wisteria in, 303 

 Jelly, a by-product, 291 

 Jerusalem artichoke, 95 

 Jobber, 279 



functions of, 279-280 

 Jujube, a semi-tropical fruit, 204 

 June-budding, 77 



Kale, 105 



Kentucky blue-grass, 306 



Kerf-graft, 80 



Kerosene as contact spray, 227 



Labeling of pollinated flowers, 



174 



Landscape-gardening, defined, 297 

 Landscape, natural, study of, 308 

 Larva, parasitized, 239 

 Larval form of insect, 225 

 Lateral buds, 28 

 Lawn, a part of landscape plan, 298 



grasses, 306 

 Laws regarding commission men, 



279 

 Layering, 54 



Chinese, 56 



compound, 55 



continuous, 66 



exercise, 67 



mound, 56 



pot, 56 



serpentine, 65 



simple, 55 



time for, 57 



tip, described, 55 



trench, described, 56 

 Laying out orchard, exercise, 140 



