300 



DISEASE IN PLANTS. 



Green fly, i6i. 

 Grew, 85. 

 Greyish spots, 187. 

 Growth, 271, 274, 275, 286. 

 Grubs, no, 207. 

 Gumming, 235. 

 Gummosis, 227, 234, 235. 

 Gyninosporangium, 114, 176, 

 223. 



Hail, 106, 240, 241. 



Hales, 85. 



Haliica, 209. 



Hardy varieties, 168, 170, 177. 



Haustoria, 134, 135, 136. 



Healing, 194, 196. 



Healing by cork, 123. 



Health, 272, 287. 



Health and disease, 91, 97, 287. 



Heliotropism, 126. 



Hetnileia, 146, 169. 



Heredity, 72, 283. 



HerpotTichia, 135, 190. 



Hessian Fly, 182. 



Heterodera, 219, 220. 



Hieraciutn, 112. 



History of Phytopathology, 85. 



Holdfast of roots, 42. 



Hollyhock disease, 143. 



Holly, 217 



Honey dew, 144, 227, 232, 233. 



Hops, 162, 187, 191, 232, 253. 



Hop-aphis, 146. 



Hop-disease, 166. 



Hop mildew, 161. 



Hormomyia, 219. 



Hornbeam, 224, 233, 242. 



Horse-radish, 260. 



Host, 284, 285. 



Hyacinth, 231, 261. 

 Hyacinth disease, 143. 

 Hybrids, 69, 156, 281. 

 Hybridisation, 69, 75, 169, 266, 



281. 

 Hydrochloric acid, 181. 

 Hydrogen, 272. 

 Hymenomycetes, 206. 

 Hypertrophy, 119, 127, 139, 



213, 215, 247, 266. 

 Hypochaeris, 112. 

 Hypomyces, 237, 

 Hypottoineiila, 254. 



Ice, 184, 209. 



Ichneumon-flies, 165. 



Icterus, 181. 



Illegitimate unions, 265. 



Immunity, 155, 156, 165, 168, 

 169. 



Impervious subsoil, iSi. 



Inarching, 269. 



Increase in dry weight, 23. 



Indian agriculture, 172. 



Indian wheats, 168. 



Indispensability of elements, 

 278. 



Infection, 262, 265, 267. 



Ingredients of protoplasm, 272. 



Insect bites, 225. 



Insect diseases, 145, 146, 154, 

 189. 



Insect punctures, 88. 



Insects, 89, 98, 108, 109, 120, 

 138, 142, 153, 174, 187, 194, 

 203, 205, 206, 207, 208, 212, 

 223, 229, 241, 244, 24S, 251, 

 254, 255, 258, 259, 269. 



Insolation, 180, 242. 



