425 



Pine, diseases of—conf. 



Lophyrus, 25, 146, 302, 368, 374, 395. 

 Lvda', red-headed, 25, 396. 

 Noctua, 25, 397, 

 Red rot of, 368. 



Rust, vesicular, of bark, pine cluster cups, 

 151, 246, 403. 



of needles, l.'.l, 403. 



Weevil (Pissode.s notutus), 400. 



— plantations, benzene versus CSo injections 



in, 335. 



— seed beds, preserving from birds, 195. 

 Pinus sylvestris, 69. 



Pitch, white (oleo-resin), 326. 

 " Pitteleine," 338, 340, 343. 

 Plane-tree leaf disease, 225, 394. 

 Plants, adventitious. See Weeds. 



— disinfection of, 37-40, 131-6. 



— parasitic, 211. 



— rooted, disinfection of, 37-40, 131-6. 

 Plasma (vegetable), 3. 

 Plasmodiophora Rrassica (Anbury, finger 



and toe), 122, 144, 400. 



— Califomica (browning of the leaves of the 



vine), 237, 388. 

 Plasmopara eubensis, mildew of cucurbitaceae, 



cucumber familj , 244. 

 Plaster (gypsum, sulpliate of lime), 42, 154-7, 



327. 



— disease of edible mushroom, 366. 

 Plastering, 154-7. 



Pleospora putrefaciens (rot of heart of beet), 



24, 36, 185, 225, 399. 

 Plum-tree, disease of :— 



Altise (Haltica chalvVjea), 274, 384. 

 Eriocampa (fly), 380, 392. 

 Exoascus (pockets), 248, 393. 

 Grapholitha Wceberiana, 146, 341, 394. 

 Hvponomeuta (ermine moth), 138, 304, 



"395. 

 Leaf, fall of (Cylindrosporium padi), 254. 

 — blister, 250, 254, 267, 271, 400. 

 Magpie moth, 121, 363, 374, 377. 

 Pvralis, 129, 134, 275, 401. 

 Rust of .stone fruit trees, 246, 266, 403. 

 Scolytus rugose, 145, 164, 404. 

 Plum-trees, action of ammonia, 98. 

 Plusia gamma (Noctua gamma), 157, 357, 



397. 

 Plutella cruciferarum (cabbage tinea), 196, 



303. 

 Pockets, plum (Exoascus pruni), 248, 



393. 

 Podosph;er<B oxycautha (mildew of hawthorn, 



apple, and cherry), 250, 266, 392. 

 Pollen sensitive to copper salts, 207. 

 Polygonum aviculare, 124, 132, 136-7. 

 Polyhalite, 117. 

 Polvpore;B (polyporus), 151, 184, 3-39, 36s, 



'400. 

 Polyporus destructor, 368. 



— fulvus, 184. 



— igniarius, 151, 339, 400. 



— pini (red spot), 368. 



— sulpliureus, 151, 400. 

 ■ — vaporarius, 368. 



Polvstigma rubrum (plum leaf blister), 250, 



"400. 

 Polvsulphide of lime, 148 et seq. 

 Polysulpbides of potash, 113, 314. 



" Pomoliue," 327. 

 Poplar, diseases of: — 



Dothichiza, 186. 391. 



Polyporus sulphureus, 151, 400. 



Saperda (shagreen), 64, 69, 379, 403. 



Sesia apiformis, 70, 336, 404. 

 Poppv, diseases of : — 



Apiiis papaveris, 331, 385-6. 



Leaf spot, 258, 369. 



Mildew (Peronospora arboresceus), 244, 

 369. 



Rust (Uromyces dianthi), 286, 370. 



Weevil (Hypera polygoni), 69, 391. 

 Potash and its salts, manufacture and use 

 of:— 



Potassium arseniate (stimulant), 208. 



— bichromate, 188-9. 



— bisulphite, meta, 50. 



— carbonate, 121-3. 



— caustic, li2. 



— chloride, 117, 120. 



— chromate, 188-9. 



— cyanide, 12, 130, 136. 



— dinitrocresylate, 367. 



— hydroxide (hydrate, caustic potash), 



112, 350. 



— nitrate, 120-1. 



• — permanganate, 190. 



— sulphate, 117-20. 



— sulphide, 112-7. 



— sulphocarbonate, 17, 74, 123-9. 



— sulphocyanide, 136. 



— xanthogenate, 129-30. 

 Potato, disease of : — 



Alternaria Solani, 253, 384. 



Altise, 302, 384. 



Aphis, .308, 333, 376, 381. 



Bug (Halticus Uheleri), 304. 



Cicadella, 304, 389. 



Colorado beetle, 95, 196, 260, 274, 379, 



395-6. 

 Disease, 86, 89, 90, 110, 119, 121, 143, 



166, 169, 175, 182, 209, 210, 211, 212, 



23/, 265, 273, 281, 284, 290, 292, 320, 



324, 366. 

 DLsin lection, 212, 237, 279, 301, 319-20, 



.356, 361. 

 Epilachna, 275, 392. 

 Frisolee, 23. 

 Gangrene of stem, 47. 

 Noctua gamma, 157, 357. 



— segetum, 24, 70, 96, 120, 275-6, 303, 



336, 3 .3, 382, 384. 

 Pox, 291, .320. 

 Rot, 47-8, 401. 



— of stem, 291. 



Scab, 47, 87, 89, 110, 114, 143, 182, 

 2.37, 291, 301, 319, 356, 401. 



Potter's clay, 281. 



Powdering with plaster of paris as insecti- 

 cide, 156. 



Powders, dusting, 12. 



— " Antimildioidium," 216. 



— "Bouillie d'Azur," 216. 



— "Coignet," 216. 



— "Crochepeyre," 216. 



— " Cupreina," 216. 



— Cuprohydrocarbonate, gelatinous, 216. 



— Eclair, 216. 



— Fonta, 162. 



