Oct. i, 1920-Mar. 15, 1921 



Index 



901 



Page 



Oecophoridae, similarity of one species to 

 Pectinophora gossypiella 814-816 



Oedemalophorus — 



kellicotti, similarity of O. venapunctus 827 



paleaceus, similarity of O. venapunctus 827 



stramineus, similarity of O. venapunctus. . . . 827 

 venapunctus, n. sp 827-828 



Oil, volatile, in Chinese colza seed 127-132 



Okra. See Hibiscus esculentus. 



Olethreutidae, similarity of certain species to 

 Pectinophora gossypiella 822 



Olives, bacteria in cans 375~379 



Olpidium viciae, cytological similarity to 



Urophlyciis alfalfae 309 



Onion Smudge (paper) 685-722 



Opius — 

 flelcheri as a Parasite of the Melon Fly in 



Hawaii (paper) 423-438 



humilis, parasite of Ceratilis capitata 424 



Organic — 

 iron compounds, availability to rice plants 



in calcareous and noncalcareous soils 50-54 



matter, effect on — 



efficacy of chlorin disinfectants 89-110 



Fusarium-wilt of tobacco 529 



influence of copper sulphate in water. . 200-203 



Orthoclase solutions, concentration of potas- 

 sium not a measure of availability to wheat 

 seedlings 615-621 



Oryza saliva, growth on calcareous soil 38-58 



Osmotic pressure — 



in plants 156-157 



of dry seeds 592-593 



Overwintering of Gibberella saubinetii 14-15 



Oxalate, ferric, avalability to rice plants in 

 calcareous and noncalcareous soils 50-54 



Oxid— 

 calcium, in potato tubers, skins, and sprouts 633 

 magnesium, in potato tubers, skins, and 



sprouts 633 



potassium, absorption by plants 616-617 



Oxidation of potassium, effect on availa- 

 bility 619-621 



Oxygen, effect on hypertrophy of conifers. . 259-262 



Pachyzancia bipunctalis, similarity to Pecti- 

 nophora gossypiella 830 



Pak-choi. See Brassica campestris chinensis. 



Paltodora similiella. Syn. Isophrictis simi- 

 liella. 



(Panzeria) Pyrauslomyia penilalis, parasite of 

 Pyrausta ainsliei 843-844 



Paraformaldehyde — 



injury to seed wheat 211-244 



physical properties 21S-223 



Paragonimus — 



lung fluke 193-195 



parasite of Melania 198 



Para-oxybenzyl isothiocyanate, difference 

 from crotonyl isothiocyanate 135 



Paranthrene palmii. Syn. Zenodoxus palmii. 



Pathological Anatomy of Potato Blackleg 



(paper) 325-330 



Peanut nodule bacteria cultures, effect on 

 milk 550 



Pectinophora — Page 



gossypiella, similar Depidoptera 807-836 



malvella, similarity to P. gossypiella 809 



Pediculoides ventricosus, parasite of Sito- 

 philus — 



linearis 443 



oryza 42 i 



Peltier, George L. (paper) : Influence of Tem- 

 perature and Humidity on the Growth of 

 Pseudomonas citri and Its Host Plants 

 and on Infection and Development of the 

 Disease 447-506 



Penicillhim — 



biforme, enzymic action 779 



camemberti, enzymic action 778 



glaucum, enzymic action 778-779 



sp., attacking wheat treated with formalde- 

 hyde 215 



Perilampus hyalinus, parasite of Neodiprion 

 lecontei 757-758 



Perkins, H. Z. E., et al. (paper): Further 

 Studies in the Deterioration of Sugars in 

 Storage 637-653 



Permanence of Differences in the Plots of an 

 Experimental Field (paper) 335-356 



Pe-tsai. See Brassica campestris pekinsis. 



Pkalaena bipunctalis. Syn. Pachyzancia bi- 

 punctalis. 



Phalonia cephalanthana, n. sp 825-826 



Phaloniidae, similarity of one species to Pec- 

 tinophora gossypiella 825-826 



Phaseolus vulgaris, mineral content of cotyle- 

 dons 875-876 



Phenylalanin in potato protein 624 



Phenylthiourea in allyl and crotonyl isothio- 

 cyanate 127 



Philips, A. G. t Carr, R. H, and Kennard, 

 D. C. (paper): Green Feed versus Anti- 

 septics as a Preventive of Intestinal Dis- 

 orders of Growing Chicks 869-873 



Phelum pratense — 



host of Gibberella saubinetii 16 



shelter plant of Pyrausta ainsliei 839 



Phoma alliicola — 



parasite of A Ilium spp 687-688 



similarity to Collctotrichum circinans 718 



Phorocera — 

 claripennis, parasite of Neodiprion lecon~ 



te* 757-758 



comstocki, parasite of Pyrausta sp 843 



Phosphate — 



calcium, effect on growth of plants 40-44 



in normal and mottled citrus leaves 166-190 



in soil extract 387-394 



sodium, effect on availability of potas- 

 sium 616-617 



Phosphoric acid. See Acid, phosphoric. 



Phosphorus — 



in bean cotyledons 878 



in normal and mottled citrus leaves 166-190 



in southern poultry feeds 143 



water-soluble in wheat, changes due to 

 tempering 272-275 



Phycitinae, similarity of certain species to 

 Pectinophora gossypiella 831-832 



