Minnesota Plant Diseases* 



Hysteriine?e, 142 



Immersion in solutions, methods 



of cure, 209, 210 



Immunity and variation, 96 



from disease, 93, 206 



Impatiens, orange leaf-rust on, 291 



Imperfect fungi (Fig. 70), 



25, 26, 117, 149, 150, 157, 152 

 anthracnose of currant and 



gooseberry, 327 



anthracnose of vines, 367, 368 

 bean anthracnose, 327 



black rot of apple, 363, 364 



flax wilt, 310 



leaf blight of celery, 328 



leaf habit of, 62 



leaf spot of beets, 328 



plum scab, 363 



potato scab, 326 



violet leaf spots, 381 



wheat scab, 310 



Impregnation of timbers to pre- 

 vent rot, 239, 240 

 Increase in size, effect of para- 

 sitism, 82 

 Indian, corn smut, tubercles of, 56 

 pipe, partnership with fun- 

 gus, 50 

 turnip leaf-rust, 376, 392 

 Individuation, 51, 56 

 Infection, and prevention of dis- 

 ease, 204 

 by wounds and prevention, 



204, 205 



conditions favoring, 98, 99 



conditions of, 62 



in parasitic fungi, 61, 62 



in timber rots, 249 



of grass leaf by a rust 



(Fig. 29), 61 



of host, 97, 98 



Inflorescences, smuts in, 158 



Inheritance of disease, 94 



Inky gill fungus (Figs. 87, 88), 



178, 179 



Inoculation of host, 97, 98 



Insects, agents of spore distri- 

 bution, 29 

 beetle fungi on, . 140 

 carrying slime mold of 



malaria, 198 



carrying spores of bird's- 



nest fungi, 186 



Insects, 



carrying smut spores, 65 



carrying spores of ergot 



fungi, 128 



causing witches'-brooms, 56 



conditions of parasitism on 



(Fig. 30), 67,68 



degeneration in, 10 



distribution of spores by, 162 

 factor of disease, 92 



fungi on (Fig. 56), 130, 131, 132 

 injuries to apple fruits, 355 



molds (Fig. 47), 68, 1/5, 116 



molds, on animals, 66 



molds, on butterflies, 69 



prevention of wounds by, 205 

 production of honey dew, 42 

 ravages by, 201 



spore distribution in car- 

 rion fungi, 187, 188 

 water molds on, 107 

 wounds caused by, 47 

 Interior-dwelling fungi, 61 

 parasites (Fig. 28), 60 

 Internal fungi, spraying of, 211 

 Iron ores, relation to bacteria, 191 

 Iron sulphate and sulphuric 

 acid, 221 

 for anthracnose of grape, 367 

 for downy mildew of grape, 370 

 in Hasselman's treatment, 239 

 Isaria (Fig. 31), 70 

 Iva xanthiifolia, downy mildew 



of (Fig. 45), in 



Jells, molds on, 122 



Jew's-ear fungi (Figs. 78, 79), 



153, 154, 166, 167 



Juniper, club rust of, 349, 350 



Kainit, in Hasselman's treat- 

 ment, 239 

 Kale, black rot of, 342 

 Kephir, bacteria in, 193 

 yeasts in, 119 

 Killing tissues, methods of, 79 

 Kinds of fruiting bodies of fungi 



(Fig. 10), 24 



Kinds of fungi, basidium-bear- 

 ing fungi, 153, 170 



sac fungi, 117, 135 



Knapsack pumps (Fig. 103), 



212, 230 



Knot black (Fig. 59), 135, 136 



