419 



Hordeuiii. See Barley. 

 Horinidium, 165, 208. 



Horse-tail (Equisetuin), action of weed- 

 killers ou, 108, 118, 161, 176. 

 Hot-water immersion of seed ag linst insects, 

 32-6. 



— par:isites, 35. 



Hydnes, 151. 



Hyduuni Scliiedermayri, 151, 395. 



Hydrate of copper. See Bouillie Bordelaise. 



— of iron (peroxide), 168-9. 



— of lime, 140. 

 Hydraulic lime, 157. 

 Hydrocarl.ides[Hydrocarbjns], 294-310, 333- 



47, 348-9. 

 Hydrocarbonate of copper (gelatinous), 216. 

 Hydrogen, arseniuretted, 93. 



— phosphoretted, 93-4. 



— sulphuretted, 41-2, 113, 123, 132, 134, 



149, 157. 



in wine, 50. 



Hylesines, 145. 

 Hylesinus ater, 25. 



— augustatus, 25. 



— cunicularius, 25. 



— oliperda, 145. 



— opacus, 25. 



Hylobius abietis (spruce weevil), 24. 

 Hvlotoma rosae (rose saw-fly), 342, 378, 380, 



395. 

 Hymenoptera, 338. 

 Hypera polygoni (poppy weevil), 68. 



— variabilis (beet weevil), 157, 307, 335. 

 Hypochlorite of copper, 201. 



— of lime, 153. 



Hypomyces perniciosus (mole disease of 

 mushroom), 81, 97, 137, 143, 151, 225, 

 250, 366, 368, 395. 



Hyponomeute of the apple-tree (small ermine 

 moth, Hyponomeuta Malinella), 80, 116, 

 138, 259-60, 275, 304, 330, 341, 357, 

 374, 395. 



Hyposulphite of lime, 149, 150. 



— of soda (sodium thiosulphate), 102, 148. 



Icerya purchasi, 351. 



Ictaria viridis, 124. 



Immersion, hot water, 31-7. 



Incurvaria, 70. 



Injection of CSj into soil, 17. 



Injections into tree trunks, 64, 89, 181, 297, 



355, 357, 363, 379. 

 Insecticides, alcoholic : — 



" Amylocarbol, " .314. 



" Antivermin," 314. 



"Fichet's," 314. 



"KBadolin," 314, 315. 



"Nessler's,"314. 



— preparation of, 314. 



Soapy (amyl alcohol), 328-9. 



— nicotinic, 370-5. 

 Insects, apterous, 16. 



— xylophagous, 14. 



Insolubilizatiou of albumen, capacity for, 9. 

 Instruments in surgical treatment of plants, 



6. 

 Inundation, artificial, 23-31. 

 Iron salts as growth stimulants, 18, 171-4. 



Iron salts as growth stimulants, their pre- 

 paration, properties, and use :— 



Borate of iron, 188. 



Ferric hydrate (sesquioxide), 168-9. 



— sulphate Fe.^3S04, 171. 



Ferrocyauide of iron, 188. 



Ferrous sulphate (green vitriol), 171 et seq. 



Pliosphate of iron, 172-3. 

 Irrigation versus disinfection, 30. 

 Irrigationg, inseciicide, 24-30, 75, 76. 



— summer, 27-30. 



— underground, 28. 



— winter, 27-30. 

 Itch, 102. 



Jassus sexnotatus, 99, 120, 304, 

 Jerusalem artichoke, 19. 

 Juice, tobacco. See Tobacco. 

 — — carbolated, 260. 

 Juniper mildew, 246. 



K 



Kainite, 117-20, 144. 



Kaolin, 164. 



Kermes. See Cochineals, 



Kerosene, 306. 



Knadoliu, 130, 314. 



Kieserite, 117-20. 



"Kristallazurin," 217. 



" Kupferklebekalkmehl," 216. 



Kupferpreparat G-muud, 217. 



^'Kupferschwefelkalk," 216. 



"Kupfersoda," 316. 



" Kupferzuckerkalkpulver, " 216. 



Laboratory, plant at disadvantage in, 11, 18. 

 Lachnosterna arcuata (red cockchafer), 120, 

 301. 



— fusca (Frtihl), 120. 

 Lactocupric bouillie, 285. 

 Lamps, acetylene, 8. 

 Lantern traps, 8. 



Larch-tree, disease of (Dasyscypha Wil- 

 kommi) : — 

 Canker of the bark, 185, 391. 

 Cossus, 64, 70, 297, 336, 357, 363, 390. 



SOo, action of, on, 80. 



HCl, action of, on, 89. 



Lard, 148, 328, 351. 



Larkspur, 382. 



Larva form of insects, 16. 



Lasiocampia pini(Pine bombyx), 25, 146, 340- 



87. 

 Laughing gas, reduction of soil nitrates to, by 



submersion, 29. 

 Laurel camphor (Laurus camphora), 352. 



— rose, disease of : — 



Kermes, 332, 367. 



use of, 382. 



Lead acetate, 195-7. 



— arseniate, 195-7. 



— carbonate, 197. 

 — hydrate, 197. 



