426 



Minnesota Plant Diseases. 



Sewer pipe molds (Fig. 43), 



107, 108 



Shade trees, diseases of, 235, 260 

 wounds and prevention, 205 



.Shaggy-mane, fungus (Figs. 87, 

 88) 178, 179 



spore distribution, 30 



Shakers, pepper, 232 



Shelf fungi, pore, 175 



smooth (Fig. 82), 171 



spore distribution, 28 



Shepherd's purse, club root of, 345 

 white rust of, 112, 330 



Shoe strings fungus, 16 



rot (Fig. 128), 260, 261, 262 



strands of honey mush- 

 room (Fig. 6), 17 



.Shot hole diseases, 151 



Shitt-ofif for spray apparatus 



Fig. Ill), 228 



Silkworms, parasites of, 71 



Silver fir, broom of, 278 



Slime flux fungi, 120 



of trees, 271 



Slime molds (Fig. 100), 



7, /p6, jp7, ig8 

 club root of turnips, etc., 345 

 parasites on plants, 198 



Plasmodium (Fig. 100), 197 



Smooth shelf fungi (Fig. 82), 171 

 partridge wood rot, 242 



smothering fungus of seed- 

 lings, 243 

 Stereum rot, 240 



Smothering fungus (Fig. 82), 172 

 of grasses, 306 



of seedlings, 243 



Smut, covered, of barley, 300, 302 

 loose, of oats (Fig. 146), 



293. 294 

 loose, of wheat, 297 



naked, of barley, 300 



of anemone, 392 



of brome, 303 



of broom corn, 300 



of carnations, 3^1, 393 



■of corn (Figs. 148, 149), 297,298 

 of corn, stimulation by, 158 



of corn, treatment, _ 223 



of grains, age of mycelium, 20 

 •of millet, 303 



Smut, 



of oats, an accomplished 



parasite (Fig. 27), 59 



of oats, formalin treatment, 



^^J, 223 

 of oats, hot water treat- 

 ment, 157 

 of onion, 320 

 of pigeon grass, 394 

 of rye leaf, 303 

 of sedge root, 394 

 of sorghum head (Fig. 150), 



298, 299 

 of sorghum grain (Fig. 151). 



299 

 of violet, 393 



of wheat, loose (Fig. 72), 157 

 of wheat, stinking, formalin 



treatment, 221, 223 



spores, germinating (Fig. 



71), 155 



spores, lurking, 31 



spores, vitality, 33 



spores, wind distribution, 27 

 stinking, of wheat. 

 Smuts (Figs. 27, 71, 72, 146 to 

 151), 155, 156, 157. 158 



accomplished parasites, 59 



epidemics of, 100, lOi 



fruit rots, 64 



half parasites, 35 



host influence in germina- 

 tion, 89 

 hot water treatment of, 225, 226 

 machines for treatment of, 232 

 on anthers, 65 

 on limited areas, 79 

 parasitic life of, 156 

 parasitic on roots, 64 

 predisposition toward, 94 

 proficiency of parasitism, 58 

 saprophytic life of, 156 

 treatment of, 33 

 Soap, in potassium permangan- 

 ate, 221 

 Scapworts, smut of, 371 

 Soda lye, prevention of timber 



rot, 240 



Sore throat, cause by yeast al- 

 lies, 120 

 Soft rots of fruits (Figs. 188, 

 189). 353, 355, 356 



