INDEX 



507 



Podosphsera 



leucotrichia 94, OxyacanthiB 

 119, 132. 



Podosphaerose 



apple 94, peach 132, pear 107, 

 plum 143. 



Point rot 312. 



Pole burn 305. 



Pole rot 305. 



Polyporosc 425, 429. 



Polyporus 



betulinus 432, carneus 436, 

 fraxinophilus 431, juniperinus 

 435, obtusus 419, pergamenus 

 429, pinicola 429, 422, pondero- 

 sus 447, Schweinitzii 426, squa- 

 mosus 421, subacidus 419, sul- 

 phurous 416, versicolor 425. 



Polysticta versicolor 429, 434. 



Pomaceous fruits 69. 



Poplar 447. 



leaf blight 447, marsoniose 447, 

 powdery mildew 447, rust 447, 

 uncinulose 447. 



Potassium sulphide 34. 



Potato 10, 13, 263. 



bacillose 277, 279, black leg 279, 

 blight 13, 14, 23, cercosporose 

 278, cost of spraying 46, downy 

 mildew 236, early blight 275, 

 fusariose 275, late blight 14, 263, 

 leaf blotch 278, little potato 271, 

 rosette 271, rot 279, scab 23, 

 267, spraying 281, stem rot 271, 

 tip burn 279, wilt 275, 277. 



Powdery mildew 20. 



apple 93, barley 330, bean 206, 

 cabbage 216, cantaloupe 221, 

 catalpa 433, cherry 119, chrys- 

 anthemum 463, cowpea 394, cu- 

 cumber 234, currant 155, dahlia 

 465, elm 439, golden glow 466, 

 gooseberry 19, 157, grape 19, 

 164, hop 240, Japan clover 395, 

 lilac 468, maple 443, oak 444, 

 oat 352, pea 258, peach 132, 



133, pear 107, plum 143, poplar 

 447, pumpkin 285, rose 19, 475, 

 roselle 286, rye 362, strawberry 

 183, squash 289, sycamore 449, 

 turnip 315, verbena 478, Vir- 

 ginia creeper 482, wheat 375, 

 willow 451. 



Power sprayer 44. 



Prepared Bordeaux 32. 



Prevention of plant diseases 18. 

 methods 19, historical 5. 



Preventive treatment for smut 322. 



Primrose 



ascochytosc 472, botryose 473, 

 colletotrichose 472, phyllostic- 

 tose 472, ramulariose 472. 



Privet 



anthracnose 473, gloeosporiose 

 473. 



Profits from spraying 50. 



Protective sprays 20. 



Protocoronospora nigricans 397. 



Pseudomonas 209, 469. 



Avense 351, campestris 211, 225, 

 314, Juglandis 449, Medicagi- 

 nis 382, Phaseoli 202, Sava- 

 stanoi 192, Stewarti 339, tume- 

 faciens 130, 131, 177, 464. 



Pseudomonosc 



alfalfa 382, cauliflower 225, 

 corn 339, chrysanthemum 464, 

 nasturtium 469, oat 351, walnut 

 449. 



Pseudoperonospora cubensis 231. 



Pseudopeziza 



Medicaginis 377, Ribis 153, Tri- 

 folii 390. 



Public plant sanitation 24. 



Puccinia 



arenariae 472, Asparagi 194, 

 bullata 229, Chrysanthemi 461, 

 Fraxini 431, graminis 330, 349, 

 359, 396, 397, Grossulariaj 160, 

 Helianthi 478, malvacearum 

 466, Menthae 453, Poarum 385, 

 Pruni-spinosae 143, Rhamni 396, 



