Oct. i, 1920-Mar. 15, 192 1 



Index 



895 



Page 



Dourine, inefficacy of echinacea against So-82 



Downy mildew of maize. See Sderospora spp. 



Drechsler, Charles, and Jones, Fred Reuel 

 (paper): Crownwart of Alfalfa Caused by 

 Urophlyctis alfalfae 295-324 



Drying, effect on formaldehyde injury to seed 

 wheat 231-242 



Dryinidae, parasite of Eutettix tenella 231 



Eaton, S. V., and Appleman, Charles O. 

 (paper): Evaluation of Climatic Tempera- 

 ture Efficiency for the Ripening Processes 

 in Sweetcorn 795-805 



"Ebony, Mexican." See Siderocarpus Jlexi- 

 caulis. 



Echinacea — 



anguslofolia, medicinal properties 63-84 



purpurea. Syn. Brauneria purpurea. 



Echinacea therapy 63-84 



Edlefsen, N. E., and West, Frank L. (paper): 

 Freezing of Fruit Buds 655-662 



Edson, H. A. (paper): Vascular Discoloration 

 of Irish Potato Tubers 377-294 



Effect of Season and Crop Growth on the 

 Physical State of the Soil (paper) 397-404 



Effect of Various Crops upon the Water Ex- 

 tract of a Typical Silty Clay Loam Soil 

 (paper) 663-667 



Effects of X-Rays on Trichinae (paper). ..845-854 



Electrolytic hypochlorite solutions, effect of 

 ammonia i 0} 



Electrometric titration, indication of relation 

 of calcium content of soil to reaction 855-868 



Emmer, host of Gibberella saubinelii 16 



Empoasca sp. , host of A bbella sub/lava 250 



Enarmonia tristrigana. Syn. Laspeyresia tris- 

 trigana. 



Ennychia rufofascialis. Syn. Noctuelia rufo- 

 fascialis. 



Enzym in Chinese colza seed destroyed by 

 tartaric acid 130 



Enzym ic action — 



in Pseudomonascitri cultures 450-455 



of Rhizopus tritici on starch 761-786 



Ephestia osirinella. Syn. Moodna ostrinella. 



Epigaea repens, influence of cold in stimulat- 

 ing growth (PI. 30) 151-160 



Erodiuin — 



cicutariunt, host of Eutettix tenella 247 



moschaium, host of Eutettix tenella 247 



Erebinae, species collected on Hibiscus lasio- 

 carpus, Malvaviscus drummondii, and Abu- 

 tilon incanum 834 



Ether — 

 ethyl, effect on formation of potato tubers . . 623 

 extract — 



in Chinese colza seed 127 



in sugar beet top silage 538-540 



in sunflower and corn silage 881-888 



Ethmia — 

 bittenella, similarity to Pectinophora gos- 



sypiella 819 



delliella, reared from Wissadula lozani 819 



Ethmiidae, similarity of certain species to 

 Pectinophora gossypiella 819 



Ethyl— Page 



bromid, effect in stimulating sprouting of 



potato tubers g 23 



chlorid, effect in stimulating sprouting of 



potato tubers 623 



ether, effect on formation of potato tubers . 623 

 Euchlaena luxurians, susceptibility to Sclero- 



spora spontanea 671 



Eucosma — 



discretivana, n. sp 823-824 



helianthana, similarity to Pectinophora gos- 

 sypiella 8 24 



obfuscana, similarity of E. discretivana. . . 823-824 

 pkbeiana. Syn. Crocidosema plebeiana. 

 Eupatorium sp., shelter plants of Pyrausla 



ainsliei 8 39 



"Eusol," value as disinfectant 86-110 



Eutettix tenella — 



description 245-246 



life history 247-248 



natural enemies 250-251 



seasonal history 248-249 



Evaluation of Climatic Temperature Effi- 

 ciency for the Ripening processes in Sweet- 

 corn (paper) 795-805 



Evaporation, effect on formaldehyde injury 



to seed wheat 221-222 



Ewing, Clare Olin, et al. (paper): Studies in 

 Mustard Seeds and Substitutes: I. Chinese 

 Colza (Brassica campestris chinoleifera 



Viehoever) 1 17-140 



Exenterus diprioni, parasite of Neodiprion 



lecontei 757-758 



Exorista vulgaris, parasite of Pyrausta sp 843 



Experimental Study of Echinacea Therapy, 



An (paper) 63-84 



Exponential indices of ripening in sweetcorn . 802- 



S04 



Extract, soil, relation to soil solution 381-395 



Fagopyrumfagopyrum, food plant of Pyrausta 



ainsliei 838 



Fasciola hepatica, liver fluke of cattle and 



sheep 194, 198 



Feed, poultry, potential acidity and alka- 

 linity 141-149 



Ferric — 

 benzoate, availability to rice plants in 



calcareous and noncalcareous soils 50-54 



chlorid — 

 availability to rice plants in calcareous 



and noncalcareous soils 50-54 



effect on growth of rice 42-44 



citrate — 



availability to rice plants in calcareous 



and noncalcareous soils 50-54 



effect on growth of rice 4 2- 44 



oxalate, availability to rice plants in cal- 

 careous and noncalcareous soils 50-54 



tannate, availability to rice plants in cal- 

 careous and noncalcareous soils 50-54 



tartrate — 

 availability to rice plants in calcareous 



and noncalcareous soi's 50-54 



effect on growth of rice 43-44 



