404 



Minnesota Plant Diseases. 



Black mold of clover (Fig. 



153), 305 



Black molds (Fig. 46), 113, 114 



dung-dwelling habit (Fig. 



16), 37 



on food, 43 



on mushrooms, 397 



parasites on, 114 



soft rots of fruits, 353 



Black rot of apple (Fig. 194), 



363, 364 

 of cabbage (Figs. 174, 175, 



176, 177, 178), 342, 343,344 

 of tomato, 328 



of vine, 365, 366 



Black rust of wheat (see rust- 



of wheat), 291 



Black spot, on elm leaf, 136 



on grasses, 136 



Blight, early, of potatoes, 329 



Blight, fire, of apples (Fig. 



195), 364, 365 



Blight, leaf, of celery, 328 



Blight, of apples and pears (Fig. 



195), 364, 365 



of bean leaf, 342 



of potato (Figs. 39, 166, 167), 



99, 1 10, in, 112, 331, 332,333 

 of potato, epidemics, 100 



of potato, inoculation by, 98 

 of potato, spores of (Fig. 



44), 109 



of rose (Figs. 203, 204), 378,379 



of sorghum, 314, 315 



of willow (Fig. 134), 272, 273 



Blister of oak leaf, 272 



Blow guns, 232 



Blueberry, cup fungi on, 145 



gall disease of, 385 



gall fungi on, 170 



galls on, 56 



rust of, 387 



Blue green algae in slime flux, 271 



Blue molds (Fig. i), 122 



allies of, 123 



assisting in fermentation, 119 



half saprophytes, 35 



on food, 43 



on mammals, . 73 



parasites on, 115 



relatives of, on bees' nests, 42 



soft rots of fruit (Figs. 188, 



189), 353 



Blue molds, 



spore resistance to drying, 33 



Blue water, 219 



Board, pine, attacked by dry rot 

 (Figs, 121, 122), 248, 249 



Boletus, species of (Fig. 85), 



176, 177 



Bones, fungi on, 42, 122 



Borage family, powdery mildew 

 of, 396 



wheat rust on, 283 



Bordeaux (see bordeaux mix- 

 ture), dry, 218, 227, 229 

 for anthracnose of currant, 327 

 for apple orchards, 347 

 for apple rot, 357 

 for apple scab, 352 

 for asparagus rust, 319 

 for bean anthracnose, 327 

 for bean rust, 319 

 for black knot, 360 

 for black rot of tomato, 329 

 for black rot of vines, 366 

 for blight of rose, 379 

 for brown rot of plums, 358 

 for carnation rust, 373 

 for downy mildew of cu- 

 cumbers, 336 

 for downy mildew of onion, 334 

 for early blight of potatoes, 329 

 for leaf blight of celery, 328 

 for leaf blight of strawberry, 



323 



for leaf rust of apple, 349 

 for leaf spot of beets, 328 

 for orange rust of rasp- 

 berry, etc., 317 

 for plum pocket, 362 

 for plum scab, 363 

 for plum leaf rust, 351 

 for potato blight, 333 

 for powdery mildew of ap- 

 ple, 361 

 for powdery mildew of 



hops, 325 

 for powdery mildew of 



vines, 366 



for rose leaf rust, 375 



for rust of mallows, 373 



for violet leaf spot, 381 



Bordeaux mixture, 



213, 215, 216, 217, 218 



stock solutions of, 216, 217 



