Apr .-Sept., 191 s 



Index 



575 



Phoma — Page 

 belae — 

 causal organism of field-rot of Beta vulga- 

 ris 144-14S 



causal organism of storage-rot of Beta 



vulgaris 144-145. 165 



control of 148-151, 174-177 



dissemination of 173-174 



identity of, with Phyllosticta betae 140-141 



inoculation of Beta vulgaris 'with 143-147 



isolation of, from Beta vulgaris 138 



morphology of 141-143 



perpetuation of 147-148 



relation of age of leaves of Beta vulgaris to 



infection by 170-173 



relation of, to Phyllosticta betae 170-173 



source of infection of 141 



s>-mptomatology of 169-1 70 



taxonomy of 139-140 



vitality of 143 



destructiva — 



character of spotting produced by 13 



cultural characteristics of 14-16 



description of 1-2, 13-14, 19 



distribution of i7j 19 



inoculation of Beta vulgaris with 11 



inoculation of Datura tatula with 12 



inoculation of Lycopersicon esculentum 



with. 2-10. 12 



inoculation of Solatium tuberosum with. . lo-ii 



mycelial growth of 13 



pycnidial development of 13-14 



pycnospores of 14 



relation of temperature to grov^th of 17 



taxonomy of 18-19 



vitality of 16-17 



Phoma Betae on the Leaves of the Sugar Beet 



(paper) 169-178 



Phoma Destructiva, the Cause of a Fruit-Rot 



of the Tomato (paper) 1-20 



Phosphorus — 



amount of, ingested by lambs 465-467 



comparison of, with protein in feed 468 



daily balance of, in lambs 472 



in feces of lambs 46S-472 



methods of analysis of 461-462 



Phosphorus Metabolism of Lambs Fed a Ra- 

 tion of Alfalfa Hay, Corn, and Linseed Meal 



(paper) 459-473 



Phyllodoce empetriformis, host plant of Herpo- 



trichia nigra 252 



Phyllosticta — 

 betae — 



identity of, with Phoma betae 140-141 



relation of age of leaves of Beta vulgaris to 



infection by 170-173 



relation of, to Phoma betae 170-173 



lycopersici, syn. Phoma destructiva. 

 solitaria, source of infection of apple bitter- 

 rot 61-64 



Picea — 

 engelmanni — 



host plant of Herpotrichia guinqueseptata . 252 



new leaf and twig disease of 251-254 



nikaensis, host plant of Rhizina injlata 93 



Pierce, W. D. (paper) Some Sugar-Cane Root- 

 Boring Weevils of the West Indies 255-264 



97209°— 15 7 



Pigeon-pea. See Cajan indicum. Page 



Pinus — 



conlorla, host plant of Rhizina inflata 94 



divaricata, host plant of Rhizina inflata 93 



maritima, host plant of Rhizina inflata 93 



monticola, host plant of Rhizina inflata 93-94 



pinaster, host plant of Rhizina inflata 93 



ponderosa, host plant of Rhizina inflata .... 94 



spp., host plants of Neopeckia coulteri 251 



strobus, host plant of Rhizinainflala 93 



sylvestris, host plant of Rhizina inflata 93 



Pisum sativum, inoculation of, with Phoma 

 destructiva 12 



Plant— 



chloroplasts of 295 



chromoplasts of , 295 



nature of color of 294-296 



plastid color substances of 295 



water requirement of, influence of hybridi- 

 zation and cross-pollination on 391-402 



Poa pratensis, hibernation of Prosopothrips 

 cognatus in 223 



Pool,V.W., and McKay, M. B. (paper) Phoma 

 Betae on the Leaves of the Sugar Beet. . . 169-178 



Populus — 

 anguslifolia, source of infestation of Pemphi- 

 gus betae 249 



balsamifera, source of infestation of Pemphi- 

 gus betae 249 



spp., source of infestation of Pemphigus 

 > betae 243 , 246, 249 



Porthetria dispar — 



distribution of wilt of 102-104 



epidemiology of wilt of 102-104 



etiology of wilt of 115-126 



pathology of blood of 109-112 



pathology of tissues of 109-112, 114 



pathology of wilt of 104-115 



relation of climate to wilt of 1C3-104 



wilt of ". 101-128 



Potato- 

 See Solanum, tuberosum. 

 sweet. See Ipomoea batatas. 



Potato-scab organism, effect of temperature 

 on germination and growth cf 129-133 



Prickly-pear. See Opuntia. 



Prickly-Pears as a Feed for Dairy Cows 

 (paper) 405-45° 



Prorodon ovum, development of, in soil . 541-542, 556 



Prosopothrips cognatus — 



control of 223 



description of 219-220 



distribution of 219 



enemies of 223 



food plants of 220-221 



generations of 220 



hibernation of 222-223 



injury to Triticumspp. by 221-222 



life history of 219-220 



Protein — 

 comparison of, with phosphorus in feed . . . 468 

 relation of, to gain in weight of lambs 462 



Protozoa — 

 development of — 



from field soils 531-542 



from greenhouse soils 516-542 



soil 511-560 



