446 
Peronospora— Continued, 
fungicides, 312. 
ganglil'ormis, study of, 298. 
byoseyami, on tobacco, 298. 
on cucumbers, 62. 
on Gonolobus, 49. 
on melon, 376. 
Peronosporaceai— 
addition to list of Kansas, 61. 
disarticulation of conidia in, 144. 
diseases caused by, 51. 
in herbarium of Division of Vegetable Pathol 
°gy, 109. 
notes, 184,426. 
structure of, 143. 
Peronosporites antiquarius, description, 270. 
Perret mixture, adhesiveness. 310. 
Petunia blight, 414. 
Peziza of larch, 397. 
Phacidiu'm pusillum, emendations, 330. 
Phalloidese, notes on development, 395. 
Phanerogams, symbiotic action of fungi, 157. 
Phosphorescent bacteria, species, 176, 318. 
Phragmidium and Puccinia, relationship, 317. 
Phycomycetes— 
classification, 135. 
definition, 389. 
description of new species, 184. 
Phytophthora infestans— 
absent in potato experiment, 27. 
notin New South Wales, 406. 
oospores in, 270, 423. 
Pierce, N. B., 66, 232, 354. 
Pine— 
blister, 413. 
fungi, 398, 413. 
leaf rust, new, 44, 326. 
needles, cause of shedding, 304, 396. 
nonparasitic disease, 305. 
Plant diseases— 
does it pay to spray for, 175. 
economic study, 59. 
experiments in treatment, 12, 309. 
in Victoria, 402. 
Kirchner on, 286. 
notes, 153,154,159. 
relation of parasitic fungi, 158 
study and prevention, 169. 
study at Paris, 294. 
study in Germany, 294, 401. 
weather affecting, 88, 293,373. 
Planting, effect of deep, 295. 
Plant lice, fungous enemy, 423. 
Plants— 
chlorotic, Sach’s work, 154. 
cultivated, parasitic enemies, 153. 
Diamond Island, list, 153. 
diseases of ornamental, 166. 
forage, fungi affecting, 95. 
parasitism, 158,190. 
substances in cell walls, 140. 
A^ariegated, extensively planted in India and 
Java, 382. 
Plasmodiophora brassicce, cause of club root, 86. 
Plum- 
action of rust, 355. 
Plum—Continued. 
black knot, 54. 56, 60 101.171, 300, 302, 303, 412 
black knot, treatment, 302. 313, 420. 
black spot. (See Plum scab), 
bladder, 409. 
blight— 
notes, 94. 
treatment, 173. 
buds used in experiment, 253. 
diseases, 408,411. 
j fruit spot, 410. 
fungi affecting, 164. 
rosetted Kelsey, budded on Marianna, 227. 
rosetted Kelsey, budded on peach, 228. 
leaf- 
blight, experiments, 253. 
rust, 412. 
spot— 
defoliation by, 62. 
treatment, 174. 
Marianna- 
budded with rosetted Kelsey, 227. 
budded from healthy side of rosetted peach, 
227. 
effect of ammoniacal copper carbonate, 255. 
effect of Bordeaux mixture, 255. 
experiments. 254. 
Myrobolan— 
effect of ammoniacal copper carbonate, 254. 
effect of Bordeaux mixture, 254. 
experiments, 253. 
pockets, 302, 304. 
rot, treatment, 307, 415. 
rust, experiment in treating, 174. 
scab, 99,100. 
shot-hole fungus, 60, 311. 
Podaxon, new species, 324. 
Podosphcera oxycanthce on cherry, 251, 256. 
Poisoning by fungi, 316, 424. 
Poison on— 
apples, 309. 
fruit, 307. 
Pole-burn of tobacco, 409. 
Polymorphism, discussion, 51. 
Polyporei— 
action on trees. 397, 405. 
Polyporites bowmanni , fossil, 296. 
Polyporxis tmlphureus, on frees, 405. 
Poplar— 
bacterial disease, 305. 
disease of black, 408. 
Potassium— 
bichromate solution- 
treatment for wheat rust. 218. 
use in soil, 204. 
ferrocyanide, test for free copper in Bordeaux 
mixture, 337, 340, 368. 
sulphide— 
adhesWeness, 204. 
effect on wheat plants, 203, 215, 218, 219. 
for corn smut, 171. 
formula, 201. 
injury, 205. 
Potato blight (Phytophthora)— 
Bordeaux mixture for, 159,172,175. 
controlling influence of temperature. 400. 
