588 



DISEASES OF CULTIVATED PLANTS 



Phytopthora, 123. 



infestans, 123. 



omnivora, 127, 128. 



phaseoli, 130. 



syringae, 561. 



Phytoptus carinatus, 543. 



theae, 543. 



Pilobolus, 19. 

 Picus major, 536. 



medius, 536. 



Pine trametes, 368. 

 Placosphaeria onobrychidis, 257. 



stellatarum, 280. 



Plasmodiophora alni, 522. 



brassicae, 524. 



californica, 61. 



vitis, 60, 65. 



Plasmopara, 118. 



cubensis, 121. 



densa, 122. 



nivea, 122. 



pygmaea, 122. 



viticola, 119. 



Pleospora, 243. 



albicans, 243. 



gummipara, 244, 



trichostoma, 246. 



Pleurotus atrocoeruleus, 363. 

 corticatus, 363. 



mitis, 363. 



ostreatus, 363. 



salignus, 363. 



ulmarius, 363. 



Plowrightia, 211. 



morbosa, 213. 



ribesia, 212. 



Pluteus cervinus, 363. 

 Podosphaera, 145. 



oxyacanthae, 145. 



ribis, 213. 



tridactyla, 146. 

 Polygonaceae, in. 

 Polyporaceae, 364. 

 Polyporus, 377. 

 adustus, 387. 



betulinus, 379. 



borealis, 381. 



destructor, 381. 



dryadeus, 380. 



fulvus, 377. 



giganteus, 382. 



hispidus, 378,^ 385. 



salignus, 381.* 



schweinitzii, 385. 



spumeus, 381. 



squamosus, 384. 



sulphureus, 382. 



Polystigma, 178. 



Polystigma rubrum, 178. 



Poria, 369. 



laestadii, 370. 



subacida, 369. 



vaporaria, 369. 



Postgenital fusion, 45. 

 Potassium sulphide, 56. 

 Potato bacteriosis, 513. 

 Powdery mildew of cherry, 145. 



of vine, 154. 



Primary cause of disease, 3. 

 Primula elatior, 413. 

 Protomyces, 88. 

 ari, 89. 



concomitans, 89. 

 macrosporus, 88. 



menianthis, 89. 



pachydermus, 89. 

 purpureo-tingens, 89. 



rhizobius, 88. 



Pruning, 28. 



dangers of, 28. 



self, 27. 



Psathyrella disseminata, 362. 

 Pseudomonas campestris, 510, 512. 

 flourescens exitiosus, 519. 



iridis, 519. 

 stewarti, 512. 



syringae, 512. 

 Pseudopeziza, 277. 



calthae, 280. 



cerastiorum, 280. 



divergens, 278. 



medicaginis, 279. 



radians, 280. 



ranunculi, 280. 



repanda, 280. 



ribis, 278. 



trifolii, 277. 

 Psilocybe, 361. 



henningsii, 361. 



spadicea, 362. 



Ptychogaster aurautiacus, 384. 

 Puccinia, 297. 



arenariae, 311. 

 asparagi, 297. 

 bullata, 307. 



chrysanthemi, 299. 

 coronata, 306. 



dispersa, 306. 



gentianae, 309. 



glumarum, 306. 



graminis, 301. 



iridis, 309, 336. 



malvacearum, 310. 



menthae, 298. 



obtegens, 308. 



pazschkei, 312. 



