Oct. i-Dec. 3, 1931 



Index 



523 



Page 

 PHYSIOLOGICAL STUDY OF GRAPE- 

 FRUIT RIPENING AND STORAGE, 



A 263-279 



Picea engelmanni, storage of seed 481-510 



Pigmentation of maize 1-31 



Pine— 

 lodgepole. See Pinus contorta. 

 western white. See Pinus tiionticola. 

 yellow. Pinus pandetosa. 

 Pine beetle. See Dendroctonus inonticolac. 

 Pinus — 

 contorta— 



host of Dendroctonus tnonticolae 189-220 



storage of seed 481-510 



monticola — 

 influence of period of transplanting on 



growth of seedlings 33-46 



storage of seed 481-510 



ponderosa — 

 threatened by Dendroctonus Tnonticolae. 189-220 



storage of seed 481-510 



sirobus, storage of seed 481-510 



PLUM BLOTCH, A DISEASE OF THE 

 JAPANESE PLUM, CAUSED BY 

 PHYLLOSTICTA CONGESTA HEALD 



AND WOLF 365-370 



Plum, Japanese. See Prunus triflora. 



Poa nemoralis var. firmula, host of Puccinia 



triiicina 164-172 



Poplar, yellow. See Liriodendron tulipifera. 

 Porosagrotis — 

 delorata. Syn. Porosagrotis orthogonia. 

 orthogonia — 



control 307-313 



distribution 291 



economic importance 305-306 



history 289-290 



life history 293-305, 314-320 



natural enemies 313-314 



Porthetria dispar, host selection 191-220 



Pope, Merritt N., and Harlan, Harry V.: 

 ASH CONTENT OF THE AWN, RA- 

 CHIS, PALEA. AND KERNEL OF 

 BARLEY DURING GROWTH AND 



MATURATION 433-449 



Potato- 

 Irish. See Solanum tuberosum. 

 sweet. See Ipomoea batatas. 



Potato tuber-rot, blackleg 81-92 



Prosopis juUfiora, host of Cyllene crinicornis. . 203 

 Prunella vulgaris, susceptibility to Puccinia 



triticina 152-172 



Prunes, effect of — 

 orchard spraying on transportation rots. . 471-477 



temperature on damage from rots 452-465 



Prunus triflora, host of Phullosticta congesta . 365-370 



Pseudotsuga taxifolia, storage of seed 481-510 



Puccinia — 

 Agropyri — 



ascia on Ranunculaceous hosts 154 



rust on Thalictnim dasycarpum 165 



alternans^ 



aecia on Ranunculaceous hosts 154 



rust on Bromi's Porleri 165 



borealis, rust on A grostis borealis 164 



Page 

 Pwccmja- Continued. 

 bromina, pathogenicity to Symphytum 



officinale 154-172 



Clematidis, aecia 151-172 



Cockerelliana, rust on Festuca Thurberi 165 



dispersa, brown rust of wheat 152-172 



glumarum, on wheat 151-172 



graniinis, on wheat 151-172 



obliterata, rust on Thalictrum alpinum 165 



perplexans, aecia on Ranunculaceous hosts. . 154 

 Persisiens, aecia on Ranunculaceous hosts. . 154 



rubigo-vera, on rye 151-172 



straminis. Syn. Puccinia rubigo-vera. 



triticina, aecial stage 151-172 



Pulmonaria — 



inontana, host of Puccinia bromina 154-172 



officinalis, failure to become infected from 



basidiosporesof Puccinia rubigo-vera 152-172 



Pyrus coronaria, organic acids 221-229 



Pythium debaryanum, confused with causal 



organism of blackleg potato tuber-rot 81-92 



Quamasia hyacinthina. Syn. Camassia esculenia. 



Quercetin, in brown-husked maize 1-3 1 



Quercus alba, host of Neoclytus capraea 210-211 



Rachis of barley, ash content 433-449 



Ragweed. See Ambrosia artemisiifolia. 



Ram, relation of age to fertility 232-233 



Ranunculus— 



susceptibility to Puccinia triticina 152-172 



aconitifolius, resistance to teliospores of 



Puccinia triticina 155-172 



acris — 

 failure to become infected from basidios- 

 poresof Puccinia rubigo-vera 152-172 



resistance to teliospores of Puccinia tri- 

 ticina 155-172 



asiaticus, susceptibility to Puccinia triti- 

 cina 152-172 



auricomus, susceptibility to Puccinia triti- 

 cina 152-172 



bulbosus, failure to become infected from 



basidiosporesof Puccinia rubigo-vera. . . . 152-172 

 Ficaria, susceptibility to Puccinia triti- 

 cina 152-172 



flammula, susceptibility to Puccinia triti- 

 cina 152-172 



lanuginosus, susceptibility to Puccinia 



triticina 152-172 



repens, susceptibility to Puccinia triticina. 152-172 

 Read, J. W., and Sure, Bamett.: BIOLOG- 

 ICAL ANALYSIS OF THE SEED OF 

 THE GEORGIA VELVET BEAN, 

 STIZOLOBIUM DEERINGIANUM .... 5-15 

 Redbud. See Cercis canadensis. 

 Red maple. See Acer rubrum. 

 RELATION OF SOIL TEMPERATURE 

 AND OTHER FACTORS TO ONION 



SMUT INFECTION 235-262 



Rhanius — 

 cathartica, failure to become infected from 



basidiospores of Puccinia rubigo-vera .... 152-172 

 Frangula, failure to become infected from 

 basidiosporesof Puccinia rubigo-vera. . . . 152-172 

 Rhizoctonia solani, similarity to Corticium 

 vagum 51 



