Minnesota Plant Diseases. 



415 



Knot, black, 



of plum and cherry (Fig. 



191), 3S8, 359, 360 



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

 Knot, red, of currants, 322, 323 



Kohlrabi, black rot of, 342 



Kumys, yeasts in, 119 



Labrador Tea, galls on (Fig. 



Z7), 82,83,171 



Laboulbeniinese, 139, 140 



Larch, canker, European, 268 



killed by parchment pore- 

 fungus (Fig. 36), 

 parchment pore-fungus rot, 

 weeping fungi on, 

 Larvae, molds on, 

 Lead arsenate, for apple orch- 

 ards. 

 Leaf blight of celery, 



of strawberry. 

 Leaf blister of oak. 

 Leaf curl, 



fungi, and plum pockets, 

 fungi, witches'-broom of 



cherries, 

 fungi, leaf habit of. 

 Leaf, destroyers of, 

 -dwelling habit, 

 -dwelling fungi, agents of 

 disintegration of debris, 

 fall of, caused by imperfect 



fungi, 

 green, absent from fungi, 

 -inhabiting parasites, condi- 

 tions of, 62, 163 

 rust of apple and pears 



(Figs. 181, 182), 347, 348, 349 

 rust of ash, 277 



rust of birch, 279 



rust of clover, 292 



rust of pine, 276, 277 



rust of plum, 350, 351 



rust of rose (Figs. 199, 200, 



201), 

 rust of willow (Fig. 138), 

 Leaf smut of onion, 



of rye. 

 Leaf spot (Fig. 70), 149, 150, 151 

 destroyer of small areas 



(Fig. 35), 78, 79 



diseases, 138 



habit of, 62 



of alfalfa, 309 



81 

 258 

 169 

 115 



347 

 328 

 323, 324 

 272 

 120 

 362 



363 

 62 

 80 

 41 



41 



152 

 7 



375 

 279 

 320 

 303 



152 



Leaf spot, 



of beets, 32S 



of clover, cup fungus, 309, 310 

 of strawberry (Fig. 35), 79 



of violets, 381, 382 



Leaf wart of dandelion, 399- 



Leaves, rusts on, 164 



tar spots on, 142 



Leguminous plants, bacteria of, 196 



Lentinus lepideus (Fig. 116), 



236, 26T 

 scaly, rot, 267 



Lenzites abietina, 266 



betulina (Fig. 86), 177 



of pine, 266 



Lepiota (Fig. 8), 20 



procera (Fig. 18), 39. 



Lettuce, downy mildew of, 



i'i-2, 337, 339' 

 drop, 322, 380, 381 



grey mold of, 380. 



sclerotium disease of, 322 



sterile-fungus rot of, 329 



Lice, plant, molds on, 116 



Lichen (Fig. 21), 48. 



-forming fungi, 145, 146 



Life methods of fungi, 35, 



processes in plants, 91 



Light-forming bacteria, 194, 



influence on bacteria, 192 



Lightning, wounds caused by, 47' 



Lignin, 40- 



action upon, by wood-dwell- 

 ing fungi, 4a 

 disintegration of, 85, 

 in wood walls, 85.86 



Lilac, powdery mildew (Fig. 

 202), 125, 37r 



Lihes, rust of, 386 



Lime and sulphur, for downy 



mildew of onion, 334. 



powder, 227 



Lime, for club root, 346. 



for onion smut, 320 



in bordeaux, 215, 



in dry bordeaux, 227, 228 



in saccharate of copper, 220 



potash of, in resin bordeaux, 218 



Liquors, yeasts in, 119 



Living together with special 

 plant parts, 62 



Localities, importance of, in 

 prevention, 205 



