450 



PLANT DISEASES 



Morel, tree, 163. 

 Moth-borer, 104. 

 Mutualism, 29. 

 Mycelium, 6. 



hibernating, 87. 



Mycogone, 134. 

 Mycoidea parasitica, 343. 

 Mycoplasma, 246. 

 Mystrosporium abrodens, 326. 



adustum, 325, 441. 



alliorum, 326, 441. 



Myxogastres, 29. 



NEGATOR DECRETUS, 327, 442. 

 Nectria ditissima, 127. 



cinnabarina, 131, 373. 



cucurbitula, 130, 373. 



goroshankiniana, 132, 374. 



ipomeae, 132, 374. 

 pandani, 293, 374. 



vandae, 132, 374. 



New Zealand white root-rot, 115. 

 Nitrate of soda, 45. 

 Nitrification of soil, 31. 



OEDOCEPHALUM FIMETARIUM, 



384- 



Oedomyces leproides, 225, 405. 

 Oidium tuckeri, 92. v 

 Olpidium brassicae, 53, 349. 

 Oospora abietinum, 298, 433. 



scabies, 299, 433. 

 Oospores, 10. 

 Ozonium auricomum, 346. 



PARAFFIN, 40. 

 Parasites, 5. 

 Partridge wood, 172. 

 Peridermium cerebrum, 267. 



conorum, 266. 



cornui, 235, 422. 



- coruscans, 266, 422. 

 elatinum, 266, 423. 



filamentosum, 264. 



giganteum, 267. 



harknessi, 264. 



ornamentale, 264. 



pini, 261, 264. 



strobi, 233. 

 thomsoni, 267. 



Permanganate of potash solution, 

 preparation of, 38. 



Peronospora cubensis, 80, 356. 



effusa, 79, 355. 



gangliformis, 74. 



hyoscyami, 81, 357. 



maydis, 81, 357. 



parasitica, 79, 355. 



sachtii, 79, 356. 



schleideni, 75, 356. 



trichotoma, 78, 355. 



trifoliorum, 78, 356. 



violae, 80, 356. 



Pestalozzia guepini, 295, 432. 



hartigii, 297, 432. 

 Peziza, 159. 



vesiculosa, 161, 384. 



willkommii, 145. 

 Pholiota adiposa, 207, 389. 



aurivella, 208, 388. 



destruens, 208, 389. 



squarrosa, 208, 388. 



Phoma abietina, 275. 

 betae, 109. 



hennebergii, 272, 425. 



sanguinolenta, 270, 424. 

 solani, 272. 



tabifica, 109. 



tuberculata, 271. 



Phragmidium rubi-idaei, 258, 418. 



subcorticatum, 260, 419. 



Phycomycetes, 53. 

 Phyllactinia suffulta, 98, 361. 

 Phyllosticta apii, 270. 



prunicola, 268, 424. 

 Phylloxera, 69. 



Phytophthora cactorum, 66, 353. 

 infestans, 62, 353. 



omnivora, 66, 68, 353. 



phaseoli, 65, 353. 

 Pistillaria flavida, 445. 

 Plasmodiophora brassicae, 334. 



californica, 338. 



vitis, 338. 

 Plasmodium, 30. 

 Plasmopara viticola, 8, 69, 354. 

 Ploeospora gummipara, 122, 371. 

 Plowrightia morbosa, 136, 375. 

 ribesia, 139, 376. 



Pocket plums, 85. 

 Podosphaera oxyacantha, 98. 

 Polyporus betulinus, 189, 392. 



borealis, 197, 392. 



dryadeus, 197, 391. 



