408 



Minnesota Plant Diseases. 



Cup fungi, 



green, rot of, 267 

 imperfect fungi of, 149 

 leaf spot of alfalfa, 309 

 leaf spot of clover, 309, 310 

 on dung, 38 

 on fruit, 65 

 on two hosts, 145 

 ring disease of conifers, 270 

 sclerotium disease of 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 



Dsedalea quercina, 257 

 Dahlia, sclerotium disease of 



roots, 322 



Damping-off 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, 154, 169 



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 



of whole plants, 80 



of host, immediate, 78 



Diphtheria, bacteria of, 193 



Dictyophora duplicata, 188 



ravenellii (Figs. 3, 94), 187 



Disease, bacteria causing, 193 



cure of, 202, 209, 210 



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, 73 



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, 73 



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, 203 



Dogs, fungi on, 73 



Douglas fir, ring scale on, 256 



