Minnesota Plant Diseases. 



407 



Common gemmed puff-balls 



(Figs. 90,91), 181, 



Composites, 



powdery mildew of (Fig. 

 210), 396, 



powdery mildew of hops on, 



rust of, 

 Cone-bearing trees, ring disease 



of, 

 Conifers, cup fungi on. 



downy mildew of seedlings, 



rust of cowberry, 



sulphur fungus on, 

 Contract of parasitism in plants 



and animals, 



Conversion of wood into punk. 

 Co-operation of state in disease 



prevention, 

 Copper acetate (dibasic). 



substitute for carbonate. 

 Copper carbonate ammoniacal. 

 Copper saccharate, 

 Copper salts, effect on roots. 

 Copper sulphate. 



for apple orchards. 



for apple seal). 



for powdery mildew of 

 vines. 



for rose leaf rust, 



in blue water. 



in bordeaux. 



in Hasselman's treatment, 



in saccharate of copper. 

 Coprinus comatus (Figs. 87,88). 



I 7 8, 

 Coral fungus (Fig. 84), 174. 



rot of \v<<x!s (Fig. 119). 244. 

 Coral root orchid. 



partnership with fungus, 

 Cordyceps (Fig. 15). 

 Cordyceps militaris (Fig. 31). 



stylophora ( Fig. 31 ). 

 Coreopsis, sterile-fungus rot of. 

 Corn, broom, smut of. 

 Corn cockles, smut of. 

 Corn, rust, 

 Corn, simit (Figs. I4S, 149). 



56. .'97. 



formalin not effective. 



poisonous to cattle, 



proficiency of parasitism. 



stimulation bv. 



182 



397 

 325 

 387 



270 



MS 

 382 

 390 



253 



75 

 19 



208 



2JO 

 220 

 219 

 220 

 213 

 219 



347 

 352 



366 

 375 

 -'15 

 215 

 239 

 _'2O 



5 

 34 

 70 

 70 



329 

 300 



393 



292 



223 



295 

 >S 



Corrosive sublimate, 226 



for potato scab, 326 



on knife in pruning, 365 



steep, 226 



Cottonwood, leaf curl fungi on, 121 

 powdery mildew of, 272 



red knot of, 134 



rust of, 279 



Couplers, hose, for spray ap- 

 paratus (Fig. in), 228 

 Covered smut of barley, 300, 302 

 Cowberry, gall disease of, 385 

 rusts, 160 

 stem and leaf rust (Fig. 



207), 387. 389- 390 



Crabs, parasites of, 6" 



Cranberry, fungus galls on, 171 



gall disease of, 385 



high bush, powdery mildew 



of, 377 



scald, 399 



Creeping pore fungus, wood 



rot, 258 



Creosote, against timber rots, 235 

 to cover wounds. .05 



r.se to prevent rot. -'37. 23<) 



Creosoting of timbers. 

 Cress, white rust on. 330 



Cronartium asclepiadeum, 386 



Crops, rotation of. -'05. 2CG 



Crowfoot, powdery mildew of. 



395' 390 



smut of. 302 



Crown rust (see rust of wheat). 

 Cruciferir. club root of. 345 



Cucumber, downy mildew of 

 (Figs. 168. it*), 170. 171). 



II.'. 334. .?.?.-;. 3,&. 33$ 

 epi'iemic of mildew ( Fig. 



40*. lot 



powdery mildew of. 3- J 4. 325 



-cliTotium disease of. 320 



wilt of. 341 



Cucurbits, wilt of (Fig. 173). 34' 



Cultures, pure, of crops. 205.206 



Cup fungi (Figs. 4. 10. 14. 61 



to 65). 117. /./o, /.//. 142 



brown rot of plums. 358 



canker of bnl-ain fir, 2<>H 



drop oi lettuce. 322. 380 



earth-dwelling habit. 39 



explosive apparatus. 31 



fruiting bodie-. 23 



