Index 



423 



Lathrop, E. C, 46 



Lathyrus odoratus, 334 

 Leaf blight nematode, 25 

 Lecanium oleae, 371 



tessellatum, 371 

 Leptosphaeria 'vagabunda, 243 

 Leptostromella elasticae, 331 

 Lettuce, 30, 67, 145 



bacterial blight, 147 



Cercospora leaf spot, 153 



cultural considerations, 145 



diseases of, 146 



downy mildew, 149 



drop, 150 



fertilizer, 5 



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, 



effect on transpiration, 63 

 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 longiflorum, 277 



speciosum var. rubrum, u,n 

 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 



Maclllaria rufescentis, 298 

 Macrophoma cattleyicola, 305 



cor dy lines, 247 



oncidii, 305 



suramensis, 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 



'violae, 358 

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



340, 350 

 Massey, L. N,, 325 

 Maublanc, 252, 297 

 McCue, C. A., 383 

 Mealy bugs, 370 

 Melanconium pandani, 313 

 Melchers, I. E., 40, 187 



method of sterilizing soils, 

 40 



Mercer, W. B., 227 

 Methods of control, 381 

 Micro-organisms, number in 

 soil, 10 



Microsphaera alni, 276^ 341 



