4o8 



Minnesota Plant Diseases. 



ring disease of conifers, 270 



sclerotium disease oi cu- 

 cumbers, 320 

 sclerotium disease of let- 

 tuce, 322 

 storage organs of (Fig. 4), 14 

 tar spots of willow and 



maple, 269, 270 



transition to, 139 



true (see cup fungi), 143, 144 

 Currant, anthracnose of, 327 



cluster-cup rust of, 386, 387 



fall of leaves, 152 



pore fungus rot, 320 



red knot of, 322, 323 



root rot of (Fig. 163), 321 



rust of, 317 



Currant, wild black, sedge rust 



of, 391 



Cure of disease, 201, 202, 209, 210 

 Cure, mechanical means in 



methods of, 209 



methods of, 209 



Curl of leaf, 120, 121 



Cystidia, 171 



Daedalea quercina, 257 



Dahlia, sclerotium disease of 



roots, 322 



Damping-ofif fungi, 45, 108, 109 



degree of parasitism. 58 



of prothallia. 383, 384 



of seedlings (Fig. 34). 77 



Dandelion, Chytridines on, 105 



leaf wart, 399 



stunted leaves, 81 



Daphne, parasites of, 67 



Dacryomycetineae, 153, IS4, i(>9 



Darnel, age stimulation, 83 



infection of, 94 



Dasyscypha resinaria, 268 



Dead stick fungi, 139 



Death of plants, 90 



Deer, wounds caused by, 47 



Degeneration of structure in 



animals. 10 



Degeneration of structure in 



plants, 10 



Destroyers of organs, 80 



of small areas (Fig. 35), 78. 79 



x>i whole plants, 80 



of host, immediate, 78 



Diphtheria, bacteria of, I93 



Dictyophora duplicata, 188 



ravenellii (Figs. 3, 94), '87 



Disease, bacteria causing, I93 



cure of, 202, 209, 2J0 



difficulty of definition, i 



distinction between health 



and, 90, 91 



economics of, 201 



factors of, 92 



inheritance of, 94 



in plants, 90 



in plants, bacterial, 192 



losses by, 201 



of birds, - 7Z 



of field and forage .crops, 282 

 of fish and lower vertebrates 



(Fig. 32), 71 



of garden plants, 316 

 of greenhouse and orna- 

 mental plants, 



of insects, 67 



of lower animals, 66 



of lower mammals, 7z 



of man, 74 



of mushrooms, red, 395 



of orchards and vineyards. 347 



of plants, bacterial, 196 



of plants, organic, i 



of plants, museum of, 209 



of plants, inorganic, I 

 of timber and shade trees, 



235, 260 

 of trees, prevention of, 



237, 238, 239, 240 



of vineyards, 365 



prevention and state aid. 208 



prevention of, 202 to 209 



Discomycetes (Figs. 4, 10, 14, 



61 to 65), 140. 141, 142 



Distribution of spores, 26 



Docks, smuts in, 158 



Dodder, 10 



a parasitic seed plant. 20d 



Dogs, fungi on, 73 



Douglas fir, ring scale on, 256 



