456 



PLANT DISEASES 



Oak, ii6, 162, 172, 178, 193, 197, 

 198, 285, 348. 



canker, 112. 



seedling disease, 121. 



Oats, 247. 



loose smut of, 210. 



Olive tuberculosis, 341. 

 Onion mildew, 75. 



scab, 273. 



sclerotinia, 156. 



smut, 223. 



Onions, 326. 

 Onobrychis sativa, 155. 

 Orange, foot-rot of, 3. 



scab, 310. 



sooty mould of, 100. 



PAEOXY, DROOPING DISEASE OF, 157. 



Pandanus disease, 293, 344. 



Panicum, 331. 



Paris quadrifolia, 224. 



Paspalum, 331. 



Pea seedling blight, 315. 



spot, 275. 



Peach, 83, 115, 251, 276, 282, 317. 



rosette, 347. 



Pear, 115, 193, 268, 276, 282. 



leaf blister, 90. 



cluster-cups, 257. 



scab, 304. 



Peridermium orientale, 267. 

 Petunia, 151. 

 Phaseoluslunatus, 65. 



vulgaris, 275. 



Phleum pratense, 249. 

 Picea, 182. 



morunda, 267. 



sitkaensis, 163. 



Pine, 116. 



• blister-blight, 235. 



branch twist, 235. 



cone fungus, 263. 



cluster-cups, 261. 



leaf-cast, 139. 



fungus, 113. 



Pink rust, 253. 

 Pinks, 319. 

 Pinus, 182. 



contorta, 264. 



densiflora, 267. 



excelsa, 267. 



insignis, 262, 264. 



Pinus lambertiana, 233. 



longifolia, 267. 



■ maritima, 262. 



ponderosa, 264, 267. 



sabiniana, 264. 



silvestris, 262. 



strobus, 163, 233, 262, 



thunbergii, 267. 



Pisum sativum, 275, 315. 

 Plane leaf scorch, 284. 

 Platanus occidentalis, 284. 



orientalis, 284. 



racemosa, 285. 



Plum, 85, 136, 197, 208, 268, 300. 



leaf blight, 291. 



blister, 135. 



rust, 257. 



scab, 310. 



Polygonum chinense, 217. 

 Poplar, 91, 92, 193, 197, 208. 

 Populus nigra, 238. 



tremula, 236, 238. 



Potato, 115, 116, 157, 172, 345. 



bacterial disease, 342. 



disease, 62. 



leaf curl, 323. 



rot, 333. 



scab, 225. 



American, 299. 



sweet, 59. 



Pringlea antiscorbutica, 61. 

 Prothallia, damping-off, 56. 

 Prunus americana, 137. 



chicasa, 136. 



japonica, gummosis of, 306. 



maritima, 137. 



pensylvanica, 137. 



serotina, 137. 



virginiana, 137. 



Pseudotsuga douglassii, i6c. 

 Purging flax, 239. 



Quassia, 343. 

 Quercus nigra, 235. 



tinctoria, 235. 



Quince, 90, 276. 



Radish. 61, 79, 334. 

 Rape, 79. 

 Raspberry, 210. 



rust, 258. 



— — spot, 286. 



