428 



Minnesota Plant Diseases. 



Sprays, , 



bordeaux resin, 218 



copper acetate, 220 



copper sulphate, 219 



eau celeste, 219 



iron sulphate and sulphuric 



acid, 221 



potassium permanganate, 221 

 potassium sulphide, 220 



saccharate of copper, 220 



Spread of diseases, prevention 

 of, 217 



Spruce, mistletoe disease of (Fig. 

 101), igg, 200, 280, 281 



rust of cowberry, . 390 



witches'-broom on (Figs. 

 24, 25), 54, 55 



Squash, downy mildew of, 334 



wilt of (Fig. 173), 341 



Squirrel, agent of spore distri- 

 bution, 330 

 corn, rust of, 386 

 tail grass, rust on, 287 

 wounds caused by, 47 



Stalked fungi (see basidium- 

 bearing fungi), 103 



Stalked puff-balls (Fig. 92), 182, 183 

 strands of (Fig. 3), 13 



Starch, molds on, 122 



solution of, by fungi, 85 



turned to sugar by molds, 114 

 yeasts in, 119 



Stars, earth (Fig. 93), 185, 186 



Starworts, smut of, 371 



State aid in disease prevention, 208 



Steeps, 221 



corrosive sublimate, 226 



formalin, 221, 223 



hot water, 225 



Stem canker of balsam fir, 268 



-inhabiting parasites, 63 



rust (see rust of wheat), 

 rust of cowberry (Fig. 



207), 387, 389, 390 



rust of pine (Fig. 136), 275, 276 

 rust of rose, 375, 376 



Stems, bacteria in, 192 



dead, cup fungi on, 144 



imperfect fungi on, 152 



rusts on, 164 



smuts in, 158 



sphere fungi on, 138 



Stereum frustulosum (Fig. 118), 242 

 hirsutum, 240 



wood rot (Fig. 117), 240 



Sterile-fungus rot of garden 



plants, 329 



Sticks, dead, cup fungi on, 144 



dead, fungi, 139 



fungi on, 134 



gill fungus on (Fig. 86), 177 

 tar spot allies on, 142 



trembling fungi on, 169 



Stimulation by rusts, 164 



by smuts, 158 



of floral rudiments, 83 



of host, 82, 171 



of new organs, 84 



Stinking smut of wheat (Fig. 



147), 295, 296 



formalin treatment, 221, 223 



Storage organs (Figs. 3, 4), 



13, 14, 15 



caterpillar fungi. 131 



food material of, 15 



of cup fungi, 145 



of ergot (Figs. 53, 54), 



127, 128, 129 

 with fruiting bodies (Fig. 



4), 14 



Storage rots of fruit, 353 



Strainer brass, for barrel pump 



(Fig. 105), 211 



Strands (Fig. 3), 13 



of dry rot (Fig. 5), 15 



of honey mushroom (Fig. 7), 18 



of puff-ball (Fig. 93), 185 



Strangling fungi (Figs. 57, 58), 



132, 133 



Strawberry leaf blight, 323, 324 



leaf spot (Fig. 35), 79, 138 



powdery mildew of, 324 



Stumps, rots of (see timber 



rots). 



Stunting of plants, 81, 82 



Sublimate corrosive, a steep, 226 

 Sucker roots of mistletoe and 



dodder, 200 



Sucker threads of parasitic fungi 



(Fig. 2), 61 



Sugar, from starch by molds, 114 

 yeast in solutions of, 119 



Sulphate, iron, and sulphuric 



acid, 221 



