902 



Journal of Agricultural Research 



Vol. xx 



Physa— Page 



nuttalli, susceptibility to copper salts. . . . 199-200 

 occidentalis, susceptibility to copper salts. . 199 



Physoderma — 



agrosiidis, morphology Ji3~3 1 4 



buimio, morphology 3 ; 3 



calami, morphology 314 



(Cladochytrium) — 

 butomi, similarity to Vrophlyctis alfalfae. . 305 



flammulae 3°5 



maculate, similarity to Vrophlyctis alfalfae . 306 



coinari, morphology 3 '3 



eleochardis, morphology 3 1 3 



gerhardti, morphology 313 



graminis, morphology 3 I 3 



hipurides, morphology 3 14 



iridis, morphology 313 



maculare, morphology 313 



menthae, morphology 3 13 



menyanthis, method of germination 314 



(Protomyces) menyanthis, similarity to 



Urophlyctis alfalfae 305 



schroeteri, morphology 3 I 3 



spargani, morphology 3 r 4 



speciosum, morphology 314 



vagans, morphology 3 '3 



zeae-maydis, morphology 313 



Physopsis, intermediate host of Schistosoma 



haematobium and S. mansoni 198 



Phytolacca, host of Gibberella saubinctii 16 



Picea — 



canadensis, hypertrophied lenticels 255-266 



mariana, hypertrophied lenticels 255-266 



pungens, hypertrophied lenticels 255-266 



rubens, hypertrophied lenticels 255-266 



Pigweed. See Amaranlhus hybridus. 



Pimpinella nigra, host of Urophlyctis kricge- 

 riana 313 



Piuc — 

 Austrian. See Pinus austriaca. 

 jack. See Pinus banksiana. 

 loblolly. See Pinus taeda. 

 longleaf. See Pinus palustris. 

 maritime. See Pinus pinaster. 

 mugho. See Pinus mughus. 

 red. See Pinus resinosa. 

 Scotch. See Pinus sylvestris. 

 scrub. See Pinus virginiana. 

 shore. See Pinus conlorta. 

 silver. See Pinus monticola. 

 western yellow. See Pinus pondcrosa. 

 white. See Pinus slrobus. 

 yellow. See Pinus ponderosa. 



Pinkbollworm, similar lepidoptera 807-836 



Pinus — 



austriaca, host of Neodiprion leconiei 757 



banksiana — 



host of Neodiprion lecontei 756-757 



hypertrophied lenticels 255-266 



. caribaea, hypertrophied lenticels 255-266 



conlorta, host of Neodiprion lecontei 757 



coulteri, hypertrophied lenticels 255-266 



eldarica, host of Neodiprion lecontei 757 



excelsa, hypertrophied lenticels 255-266 



marilima, hypertrophied lenticels 255 



Pinus — Continued Page 



monticola — 



host of Neodiprion lecontei 757 



hypertrophied lenticels 255-266 



mughus, host of Neodiprion lecontei 757 



palustris, host of Neodiprion lecontei 757 



pinaster, calcifugous nature 34 



ponderosa — 



host of Neodiprion lecontei 757 



hypertrophied lenticels 253-266 



var. scopulorum, hypertrophied len- 

 ticels 253-266 



resinosa — 



host of Neodiprion lecontei 757 



hypertrophied lenticels 255-266 



rigida, hypertrophied lenticels 255-266 



strobus — 



host of Neodiprion lecontei 757 



hypertrophied lenticels 255-266 



sylvestris — 



host of Neodiprion lecontei 757 



hypertrophied lenticels 255-266 



taeda, host of Neodiprion lecontei 757 



virginiana — 



host of Neodiprion lecontei 757 



hypertrophied lenticels 255-266 



Pipunculus — 



industrius, parasite of Eulettix tenella 250-251 



vagabundus, parasite of Euteltix tenella. . . 250-251 

 Planorbis calliogly plus — 

 intermediate host of Schistosoma haemato- 

 bium and .S". mansoni 198 



susceptibility to copper salts 199 



Plant growth, influence of cold 151-160 



Plants.transpiration, correlation and causa- 

 tion 57S-585 



Platyedra vilclla, similarity to P. gossypiella. . 809 

 Plalynota — 



ftavedana, similarity to P. roslrana 82a 



roslrana, similarity to Pectinophora gossy- 

 piella 821-823 



Pod-borer, tamarind. See SUophilus linearis. 



Polarization of sugars in storage 638-653 



Polygonum — 

 hydropiperoides, food plant of Pyrausta 



ainsliei 838 



incarnalum. Syn. P. lapalhifolium. 

 lapathifolium, food plant of Pyrausta ains- 

 liei 838 



pennsylvanicum, food plant of Pyrausta 



ainsliei 837-844 



persicaria, food plant of Pyrausta ainsliei. . . 838 

 Polynema eutetlixi, parasite of Euteltix tenella. 250 

 Poncirus trifoliata, influence of temperature 

 on — 



development of Pseudomonas citri 483-488 



growth 459~47i 



rest period 459 



Potash— 

 in plants grown with — 



ferrous sulphate and gypsum 42 



sodium bicarbonate and sprayed with 



lime and iron salts 46 



Sec Potassium. 



