84 THE RUSTS OF GRAINS IX THE UNITED STATES. 



Page. 

 Crataegus. See Buckthorn. 



Dactylis spp., host plants for grain rust 15, 16, 46 



Damage. See Losses. 



Dangeard and Sapin-Trouffy , on sexual reproduction in the rusts 33 



Davis, A. M., on legislation to restrict the growing of barberries 29, 80 



Denmark, investigations relating to the wintering of grain rusts 46, 76 



Derr, H. B., inoculation experiments with grain rusts 18, 21, 22-23 



Disease, methods used in breeding for rust resistance in grain 15, 70-73, 77-78 



Dissemination of the spores. See Rusts, grain, dissemination. 

 Distribution of rusts. See Rusts, grain, distribution. 



Eatonia obtusata, host plant for grain rust 16 



Elymus spp. , host plants for grain rust 13, 16, 28 



England, investigations relating to the wintering of grain rusts 46, 76 



Epidemics, rust. See Rusts, grain, epidemics. 



Erhart, B . , on the relation of barberries to rust 29, 80 



Eriksson, J., and Henning, E., on investigations of grain rusts. . . . 15, 32, 45, 46, 70, 80 



on investigations of grain rusts 13, 15, 16, 18, 28, 32, 46, 58, 70, 80 



Evans, I. B. P. , on biologic forms of Puccinia 27, 80 



Experiments, inoculation, with grain rusts 15, 16-28, 33-45, 49-53, 54-57, 59-CO, 75-76 



Farrer, W. , on investigations of grain rusts 70, 80 



Fertilizers, relation to occurrence of grain rust C9-70, 77 



Festuca spp. , host plants for grain rust 16 



France, laws to restrict the growing of barberries 29 



Fraser, H. C. I., and Blackman, V. H., on sexual reproduction in the rusts 33, 79 



Fungi, parasitic, effect of distribution on life histories 12-28, 74 



Funke, W. , on experiments with barberry rust 31, 80 



Galloway, B. T., experiments to prevent grain rust 66-67, 69. 80 



Geographic distribution of rusts. See Rusts, grain, distribution. 



Germany, investigations on the wintering of grain rusts 45-46, 76 



Germination of rust spores. See Incubation. 



Gibson, Miss, experiments as to viability of rust spore.? 55 



Grain, rust-resistant varieties, selection and breeding 70-73, 77-78 



Grasses, relationships to grains as rust hosts 28 



Gymnosporangium clavariaeforme, occurrence showing origin of the binucleated 



condition in the secidium 33 



Harter, L. L., on the effect of soil treatment on the character of plant? 68-69, 81 



Hayman, J. M., on rust investigations 73, 81 



Hecke, Ludwig, on the wintering of rusts 46 



Henning, E., and Eriksson, J., on investigations of cereal rusts. . . 15, 32, 45, 46, 70, 80 



Hetercecism of the grain rusts 28, 31, 45, 76 



Hitchcock, A. S., and Carleton, M. A., on investigations of rusts.. 15-16, 48, 52, 67, 81 



Holcus sp . , host plant for grain rust : 45 



Holway, E. W. D., and Arthur, J. C, on investigations of rusts 32, 79 



Hordeum spp., host plants for grain rust 16, 28, 49, 50, 51, 52, 57 



vulgare. See Barley. 



Hornemann, J. W., on the relation of barberries to rust 29, 81 



Host, effect of change on the morphology cf the grain rust uredospore 25-28, 75-76 



Humidity, relation to development of rust 59, 63, 77 



Impatiens fulva, host plant for grain rust 13 



Incubation, spores of grain rusts, relation to seasons 31, 56, 59 



Infection, grain rust, conditions favoring 59 



Inoculation experiments. See Experiments, inoculation. 



Introduction to bulletin 7-8 



216 



