Oct. I, 1919-Mar. 15, 1920 



Index 



615 



Phaseolus — Page 



lunatus, effect of relative length of day and 



night 600 



vulgaris — 

 effect of relative length of day and night. 565, 



577-578 



host of Sderotium rolfsii 128 



Phihps, A. G., Carr, R. H., and Kennard, 

 D. C. (paper): Meat Scraps versus Soybean 

 Proteins as a Supplement to Corn for Grow- 

 ing Chicks 391-398 



Phlegetkontius — 



S-maculata at light traps 477-481 



sexla, experimental host of Sorosporella 



uvella 43 2-436 



Phleum pratense, host plant of Oscinisfrit. . . . 471 



Phlox sublata, host of Sclerolium rolfsii 129 



Pholus pandorus at light traps 477-481 



Phosphate — 



absorption by plant 73-1 1 7 



diammonium, effect on yield in acid soils. 121-122 

 dipotassium — 



effect on yield in acid soils 121-122 



in poultry rations 394 



in soils at various moisture contents 141-142 



potassium, effect of moisture in substratum 

 on physiological proportion to other 



salts 357-378 



rock, effect of oxidation of sulphur on solu- 



biUty 329-345 



sodium, effect on sodium-chlorid tolerance 



of wheat seedlings 352 



Phosphorus — 



in Hordeum spp 55-721 78-96 



in Sorghum vulgare 4-30 



in water-free composts 331-340 



Photoperiod, new term for favorable length 



of day 603 



Photoperiodism, new term for response of 

 organism to relative length of day and 



night 603 



Phymatotrichum omnivorum. Syn. Ozonium 



omnivorum. 

 Phytophlhora infestans, resistance of potatoes 



to 281 



Pistillate spikelet, development in Zea 



mays 255-266 



Plant- 

 distribution, effect of length of day 593-597 



growth and reproduction, effect of length 



of day and night 553-606 



reproduction, effect of length of day and 



night 572-578 



Poa pratensis, host plant of Oscinis frit 471 



Polia renigcra at light traps 477-481 



Pollen, barley, germination 525-535 



Polysaccharides in juice 6i Sorghum, vulgare. . 16-22 

 Porihrelria dispar, larva not attacked by 



Ezii>iomyia calosom.ae in experiment 495 



Potash in Sorghum vulgare 4-30 



Potassium — 



absorption by plant 73-117 



alum, effect on sodium-chlorid tolerance of 



wheat seedlings 352 



chlorid, effect on — 

 sodium-bicarbonate tolerance of wheat 



seedlings 353 



sodium-chlorid tolerance of wheat sced- 



hngs 352 



Potassium — Continued Page 

 chlorid, effect on — Continued 

 sodium-sulphate tolerance of wheat seed- 

 lings 353 



in Hordeum, spp SS-721 78-96 



in soils at various moisture contents. . . . 141-142 



iuSorghurmulgare 4-30 



nitrate, toxiclimits 272-274 



phosphate, effect of moisture in substratum 

 on physiological proportion to other salts 357- 



378 

 Potato- 

 sweet, hostoi Scleiciiumrolfiii 127-128 



SeeSolanum tuberosum. 

 Potato-rot fungi, temperature relations. . . . 511-524 

 Prcdenia — 



commitinae at light tiaps 477-481 



eridania, experimental host of Sorospctella 



■uzella 43O; 437 



ot nilhogalli atM^ht traps 477-481 



Propionic acid. See Acid, propionic. 

 Protein — 



crude, in yellow-berry wheat 167 



in brown and black alfalfa 301-303 



in gainof two-year-old steers 251-252 



in rationof two-year-old steers 242-251 



in Sorghum, zulgare 4-30 



in sunflower and com silage 327 



Proteins, soybean, comparison with meat 

 scraps as supplement to com for growing 



chicks 391-398 



Pseudaltactocera calosomae, parasite of Calo- 



scma calidum, 483-484 



Pseudomonas — 



azenae, effect of dry heat 386-390 



glycineum. Syn. Bactetium glycineum. 

 Psidium — 



cattleianum, host ftuit of Ceratitis capitata. 442-446 

 guajaza, host fruit of Ceratitis capitata. . . . 442-446 

 Physiological Study of the Parasitism of 

 Pythium debaryanum Hesse on the Potato 



Tuber (paper) 275-298 



Pyrausta ainsliei, n. sp 175-176 



Pythium debaryanum — 

 effect on starch, sugar, and pentosan con- 



tentof potatoes 277-278 



method of growth 291-292 



physiology 275-298 



rate of growth 278-295 



effect of — 



corking 287-288 



hydrogen-ion concentration of potato 



juice 281 



resistance of cell walls 281-295 



Pyrausta — 

 nelumbialis. Syn. Pyrausta ainsliei and 



Pyrausta penitalis. 

 nubilalis — 



adult 173-174 



larva 174 



pupa 174 



penitalis — 



adult 1 76-1 77 



latva 177 



pupa 177 



spp.— 



adult 171-172 



la rva 1 7 2-1 73 



pupa 172 



Pyrrhia umbra at light traps 477-481 



