Index 



427 



Rosa chinensis, %i% 

 Rose, 318 



anthracnose, 326 



black spot, 324 



blossom blight, 320 



bronzing of leaves, 319 



Cercospora leaf spot, 330 



crown canker, 329 



crown gall, 320 



cultural considerations, 318 



diseases of, 318 



downy mildew, 320 



effect of humidity, 73 



fertilizer, 6 



leaf spot, 327 



mechanical spotting, .321 



powdery mildew, 323 



rust, 322 



Septoria leaf spot, 328 



stem canker, 328 

 Rosellinia massinkii, 270 

 Rubber plant, 331 



cultural considerations, 331 



diseases of, 331 



leaf spot, 331 

 Russell, H. M., 370 



Sackett, W. G., 13 

 Sarcina luiea, 13 

 Scale insects, 371 

 Schreiner, O., 46 

 Schizanthus, 332 



anthracnose, 332 



cultural considerations, 332 



diseases of, 332 



pinnatus, 332 

 Sclerotinia bulborum, 270 



fuckeliana, 29, 150, 269, 315, 

 ,239 



libertiana, 19, iii, 128, 117, 

 140. 340, 354 

 Sclorotium bulborum, 350 



orchidearum, 306 



rolfsii, 19, 158, 171 



tulipae, 3 so, 351 



iuliparvm, 350, 351 

 Screw pine, 313 

 Seaver, F. L., 350 

 Seed, age of, 104 



cultural considerations, 104 



Seed, diseased, 104 



effect of fertilizer, io£ 



storage conditions, 106 



testing, 106 



treatment, 107 



weight and color, 105 

 Selby, A. D., 35, 273 

 Selections of cuttings, 409 

 Shading, effect of, 68 

 Shantz, H., 68 

 Septoria aealeae, 212 



chrysanthemella, 241 



chrysanthemi, 341 



consimiles, 152 



cyclaminis, 250 



dianthi, 226 



lactucae, 152 



lycopertici, 190, 191 



majalis, 285 



petroselini var. Apii, 130 



rosae, 328 

 Shamel, A. D., 34 

 Sheldon, J. L., 251 

 Sherbakoff, C. D., 188 

 Sick soils, 16 



acid, 28 



treatment, 28 

 Sling psychrometer, 77 

 Slugs, 378 



Smith, E. F., 267, 3x0 

 Smith, R. E., 207, 312 

 Smoke injury, 95 



control, 96 

 Soap, 384 



Sobralia macramtha, 3qp 

 Soil flora, 7 



action on mineral substances^ 



and soil fertility, 9 



nature and function, 10 



parasitic, 22 

 Soil infesting insects, 375 



treatment, formaldehyde, 33 

 Soil sterilization, 32 



changes due to, 45 



effect on plants, 44 



effect on seed germination, 43 



steam, 34 

 Solatium melongena, 142 

 Solid beds, 84 



