Oct. 7-Dec. 30, 1918 



Index 



677 



Page 



Pachycrepoideus dubius — 



enemy of Mediterranean fruit fly 419-466 



puparium parasite of Mediterranean fniit 

 fly 461-463 



Panicularia pauciflora, source of Puccinia 

 graminis avenae transferred to uncongenial 

 hosts 243 



Panicum capillare, food plant of Miris dola- 

 bratus 1S2 



Paracresol, used to determine — 



catalase activity of seeds 162, 166 



oxidase activity in normal and blighted 

 spinach 377-380 



Paramignya longipedunculata, susceptibility 

 to Pseudomonas citri 662-665 



Parasites of Mediterranean fruit fly in 

 Hawaii 419-466 



Parasitism, Morphology, and Cytology of 

 Cronartium ribicola (paper) 619-660 



Peach. See Amygdalus persica. 



Pemberton, C. E.,and W'illard, H. F. (paper): 

 Contribution to the Biology of Fruit-Fly 

 Parasites in Hawaii 419-466 



Penicillium — 

 sp., fungus isolated from Ipomoea bata- 

 tas 355-356,364 



sp.notcauseof dam ping-off in conifers 549 



Pentoxid, phosphorus, in — 



greensand 48s 



mulch, plowsole, and subsoil 508-516 



normal and blighted spinach 371-375 



Peonia officinalis, host of Cronartium flac- 

 cidum 638-639 



Peptid nitrogen in normal and blighted 

 spinach 400-404 



PeridermiuTti — 



cerebrum, parasite of Pinus rirginiana 625 



pini— 



parasite on Pinus sylvestris 625 



acicolum, nuclear division of aeciospores . . 639 



Peroxid of hydrogen, used in determining 

 catalase content of seeds 140-144 



Peroxidase in frozen cabbage leaves 88-89 



Pestalozzia — 

 /wfterea, isolated from damped-off conifers 547-558 

 Aar/iffn, isolated from damped-off conifers. 547-558 

 sp., isolated from Ipomoea batatas 364 



Pheidole megacephala, natural enemy of Med- 

 iterranean fruit fly 419-466 



Phenolphthalein, used in — 



determining catalase content of seeds 139 



titration of silage extract 116-117 



Phleum pratensc — 



food plant of Mtris dolabralus 176, 182-183 



source of Puccinia graminis phleipratensis 



transferred to scmicongcnial hosts 244 



uncongenial host of Puccinia graminis 

 avenae 243 



Phloroglucin, used to determine oxidase 

 reaction in normal and blighted spinach . . 377-380 



Phoma— 

 batatae, reported causal organism of dryrot 



of Ipomoea batatas 349 



bclac, not cause of damping-off in conifers . 540-558 



Phorantha occidentis, parasite of Miris dola- 

 bratus 1 76 



Phosphate — Page 



potassium, in solution used in experiments 



with greensand 486-492 



sodium, effect on plowsole 507 



Phosphates in — 



greensand 483-492 



olive earth *. . . . 484 



Phosphomolybdic acid. See Acid, phospho- 



molybdic. 

 Phosphorus — 



, in hardened and nonhardened cab- 

 bage 97, 105-108 



pentoxid in — 



greensand 485 



mulch, plowsole, and subsoil 508-516 



normal and blighted spinach 37I-37S 



Phosphotimgstate, barium, used in deter- 

 mining nitrogen in spinach 399-404 



Phosphotimgstic acid. See Acid, phospho- 



tungstic. 

 Physiological Studies of Normal and BUghted 



Spinach (paper) 369-408 



Phytophthora sp., causal organism of damping- 

 off in conifers 530 



Picea — 

 engetmanni, host of damping-off parasites. 523-558 



excclsa, host of damping-off parasites 531-558 



Piemeisel, F. J., et al. (paper): Plasticity of 



Biologic Forms of Puccinia graminis 221-249 



Pig, guinea, weight of heart 411 



Pine — 



Austrian. Pinus auslriaca. 

 Corsican. See Pinus nigra poiretiana. 

 jack. See Pinus banksiana. 

 loblolly. See Pinus taeda. 

 pitch. See Pinus rigida. 

 red. See Pinusesinosa. 

 Scotch. See Pinus sylvestris. 

 scrub. See Pinus virginiana. 

 shortleaf. See Pinus echinata. 

 white. See Pinus strobus. 

 yellow. See Pinus ponderosa. 

 Pinus — 

 austriaca, host of damping-off parasites. . 531-558 

 banksiana, host of damping-off parasites. 525-558 



echinata, germination in mineral soil 526 



flexilis, host of Cronartium ribicola 620 



montana, attacked by Melampsora pini- 



torqua 551 



nigra poiretiana, host of damping-oS 



fungi 5*4-558 



parvifiora — 



host of Cronartium ribicola 620 



nature of infection by Cronartium ribi- 

 cola 649, 651 



ponderosa — 



host of damping-off parasites 523-558 



nature of injury from Cronartium comp- 



toniae 649 



resinosa, host of damping-off parasites 53'-Ss8 



rigida, germination in mineral soil 526 



scopuloTum. Syn. Pinus ponderosa. 

 strobus — 



host of Cronartium ribicola 619-660 



host of damping-off parasites 530-558 



sylvestris, host of — 



damping-off parasites 531-558 



Pcridcrmium pini 625 



