Index 



423 



Lathrop, E. C, 46 



Lathyrus odoratus, 334 



Leaf blight nematode, 25 



Lecanium oleae, 371 

 iessellalum, 371 



Leptosphaeria vagabunda, 243 



Leptostromella elasticae, 331 



Lettuce, 30, 6^, 145 

 bacterial bhght, 147 

 Cercospora leaf spot, 153 

 cultural considerations, 145 

 diseases of, 146 

 downy mildew, 149 

 drop, 150 

 fertilizer, $ 

 gray mold, 150 

 Kansas disease, 148 

 leaf spot, 152 

 root knot, 153 

 rosette, 153 

 shot hole, 152 



South Carolina disease, 147 

 top burn, 147 



Lewis, I. M., 262 



Light, effect on anatomy of 

 plants, 63 

 effect on construction and 

 management of hot-houses, 56 

 effect on disease resistance, 66 

 effect on lettuce, tomatoes, cu- 

 cumbers, roses, carnations, 



54 

 effect on transpiration, £3 

 pathological relationship, 53, 



55 



rays, effect on color of plants, 



64 

 relation to greenhouse cul- 

 ture, 53 

 Light intensities, effect on lettuce, 

 69 

 effect on plants, 68 

 effect on radish, 70 

 Lights, colored, effect of, 58 

 Lilac, 65, 275 

 cultural considerations, 275 

 diseases of, 275 

 leaf blight, 275 

 powdery mildew, 276 

 twig blight, 276 



Lilium_ longifiorum, 277 



speciosum var. rubrum, 277 

 Lily, 277 



Bermuda disease, 278 



Botrytis disease, 279 



cultural considerations, 277 



diseases of, 277 



rust, 279 

 Lily of the Valley, 284 



cultural considerations, 284 



diseases of, 284 



leaf spot, 285 



rot, 285 



Septoria leaf spot, 285 

 Lime, 30 

 Linseed oil, 399 

 Lycaste, culture of, 292 

 Lycopersicum esculentum, 180 



Macillaria rufescentis, 298 

 Macrophoma cattleyicola, 305 



cordylines, 247 



oncidii, 305 



suramensii, 314 

 Macrosporium bulbotrichum, 

 216 



solani, 193 

 Magnesium lime, 31 

 Malnutrition, 97 



causes of, 97 



control, 98 

 Mangin, M. L., 299 

 Marguerite, 208 

 Marsonia perforans, 152 



motae, 358 

 Massee, G., 238, 283, 288, 293, 



340, 350 

 Massey, L. N., 325 

 Maublanc, 252, 297 

 McCue, C. A., 383 

 Mealy bu^s, 370 

 Melanconium pandani, 313 

 Melchers, I. £., 40, 1S7 



method of sterilizing soils, 

 40 

 Mercer, W. B., 227 

 Methods of control, 381 

 Micro-organisms, number in 



soil, 10 

 Microsphaera aim, 276, 341 



