426 



Index 



Plantain lily Tariegated, blight 



of, 284 

 Plant diseases, nature of, 93 

 Plant lice, 371 



Plasmodiophora brassicae, 122 

 PUospora orchidearum, 305 

 Poinsettia, 313 



collar rot, 314 



cultural considerations, 313 



diseases of, 314 

 Potassium, changes of, 14 



sulphide, 406 

 Primrose, 315 



anthracnose, 316 



blight, 316 



cultural consideratioil% 315 



diseases of, 315 



leaf blotch, 317 



leaf spot, 317 



spot decay, 315 

 Primula obconia, 316 



sieboldii, 316 



sinensis, 315, 316 

 Pseudococcus ciiri, 370 



longispinus, 370 

 Pseudomonas campestrit, 124, 



I2S 



erodii, 262, 263 



jluorescens, 162 



hyacinthi, 267, 268 



lachrymans, 138 



maculicolum^ 123, 124 



marginaU, 148 



phaseoli, no, in 



solanacearum, 185, 186 



syTtngae, 27s 



teutlium, 119 



tumefaciens, 114, 115, 236, 

 320 



viridilividum, 147 



•ttitans, 147, 148 

 Pseudoperonospora cubensis, 138 

 Pteris argyria, 258 



cretica, 258 



cretica var. magnifica, 258 



serrulata avistata, 26, 216, 254 



tremula, 26 



wimeseth, 26 

 Puccinia antirrhini, laz 



chrysanthemi, zyj 



Puccinia eriophori, 243 



menthae, 154 



oxalidis, 306 



phragmitis, 176 



prostii, 349 



schroeteri, 28S 



tulipae, 349 



violae, 353 

 Pucciniastrum hydrangeae, 273 

 Pyrenochaeta bergemni, 206 

 Pythium de Baryanum, 17, 18, 



127, 256, 257, 264 

 Pythium intermedium, 256, 257 



Radish, 30, 67, 173 



cultural considerations, 173 



damping off, 174, 175 



diseases of, 173 



downy mildew, 175 



root knot, 175 



scab, 174 

 Ramularia primulae, 317 

 Rand, F. V., 137 

 Rane, F. W., 67, 84 

 Rap Anus sativus, 173 

 Razi, Ali, 238 

 Reddick, D., 356 

 Red spider, 365 

 Reseda odorata, 286 

 Rest period, breaking of, 86 

 Rheo sporangium apkaniderma- 



tum, 174 

 Rhizoctonia root rot, 20 



solani, 19, 20, 21, 119, 153, 

 200, 2n, 233, 24s, 314, 315, 

 346 

 Rhieoglyphus eckinops, 279 

 Rkizopus necans, 283 

 Rhopalosiphum violae, ijz 

 Rhubarb, 30, 175 



anthracnose, 176 



cultural considerations, 175 



diseases of, 176 



leaf spot, 176 



powdery mildew, 176 



rust, 176 

 Roasting or pan firing, 39 

 Rogers, S. S., 131 

 Root knot, 23, 119 



