INDEX 



323 



Frost, Action of, 282 

 Causes of, 284 

 Death due to, 287 

 Leaves of conifers injured by, 112 

 Shedding of leaves owing to, 286 

 Transplanting favours injury by, 



H, 15 

 Frost-beds, 10 



canker, 293 

 cracks, 284 

 "Rib," 285 

 Fruit - trees, Dematophora necatrix 



on, 82 

 Fungi, 40 



Biology of, 45 

 Classification of, 57 

 Heat requirements of, 46 

 Importance of moisture for, 46 

 may attack uninjured plants, 50 



enter only through a wound, 50 

 Fungus, Beef-steak, 206 



House, see Merulius lacrymans 

 Fusicladium Tremulas, 105 

 Fusidium, 141 



candidum, 94 



Gales, Damage due to, 299 

 Galium, Dodder on, 34 

 Game, Barking by, 241, 249 

 Gas, Coal, Effects of, 281 

 Gastropacha pini, 218 

 Genista, Dodder on, 34 

 Germ -pore, 159 



tube, 40 



Germination of seed, 279 

 Glceosporium ampelophagum, 104 



nervisequium, 140 

 Gnomonia erythrostoma, 88 

 Gonidia of Peronosporeas, 57 

 Gonidium denned, 45 

 Grafting, 265 



Wax as a dressing for wounds, 260 

 Gramineae, Ergot on, 98 



Rust of, 155 

 Grape, see Vine 



Disease, 70 



Grapholitha pactolana, 89 

 Grasses, see Gramineas 

 Green-rot, 42, 224 

 Growth-borer, Pressler's, 18 



in height, how limited, 7 

 Gymnoasceae, 131 

 Gymnosporangium, 51, 157 



clavariaeforme, 1 58 



conicum (Juniperum), 157 



Sabinas (fuscum), 1 58 



tremelloides, 159 



Hail, Effects of, 299 



may predispose to disease, 15, ii8> 



299 



Hallier's early work, 4 

 Hardening of trees, 283 

 Hares, Barking by, 241 



in regard to potato disease, 65 

 Hartig's, R., chief works, 4 

 Haustoria of fungi, 42 



Peronosporeae, 57 



on the roots of Phanerogams, 



24, 34 



Hawthorn, see Crataegus 

 Hazel, Dodder on, 34 



Erysiphe guttata on, 70 



Nectria ditissima on, 92 



Sphaerella on, 88 

 Healing in general, 225 

 Heat-requirements of fungi, 46 

 Height-growth, how limited, 7 

 Helotium Willkommii, 117 

 Hemp, Parasite of, 25 

 Heredity in relation to disease, 15, 16 

 Herpotrichia, an example of mycelial 

 infection, 47 



nigra, 76 



Hetercecious fungi, 49, 154, 176 

 Honey Agaric, 207 



Dew, 98 



Honeysuckle, see Lonicera 

 Hop, see Humulus 

 Hornbeam, Exoascus on, 135 



Melampsora on, 171 



Nectria ditissima on, 92 

 Hornbeams, Fissures in the cortex of, 



272 



Host, Watery condition of, favourable 

 to parasites, 13 



Active growth of, unfavourable to 



parasites, n 



House-fungus, see Merulius lacrymans 

 Humulus, Dodder on, 34 

 Hyacinths, Hyphomyces on, 38 



Bacteriosis of, 37 

 Hydnum diversidens, 202, 258 

 Mycelial growths of, 42 

 Hymenomycetes, ' 1 84 



Mycelial growths of, 42 

 Hyphae, see also Mycelium 



action on calcium oxalate, 52 



Characteristic action of, 52 



Septate, 40 



Hyphomyces on hyacinths, 38 

 Hypoderma, 107 

 Hysterium, 107 



Effects of iodine on, 42 



resemblance to Rhytisma, 106 



Y 2 



