Oct. i, 1920-Mar. 15, 1921 



Index 



907 



Typha— Page 



latifolia, shelter plant of Pyrausla ainsliei. . S39 

 sp., food plant of Dicymotomia julianalis. 831 



Tyrosin in potato sprouts 624 



Ulmus, host of Gibberella saubinetii 16 



Uranolcs melinus. Syn. Strymon melinus. 



Urocyslis cepulae, similarity to Collelotrichum 

 circinans 718 



Urophlyctis — 



alfalfae, parasite of alfalfa 293-324 



bohemica, haustoria 313 



(Cladochytrium) pulposa, parasite on Chen- 



opodium spp 300 



hemisphaerica, similarity of U. alfalfae in 



growth 303 



kriegeriana — 



haustoria 313 



Syn. U. hemisphaerica. 

 leproidea. similarity of U. alfalfae in growth . 303 



magnusiana, haustoria 313 



major, haustoria 313 



{Physoderma) leproidea, parasite of beets. . 300 

 pluriannulatus , similarity to U. alfalfae. . . . 312 

 pulposa — 



apical apparatus on vegetative cells 306 



haustoria 3 13 



rubsaameni — 



haustoria 313 



nuclear behavior 308 



Vaccinium — 

 corymbosum, influence of cold in stimulat- 

 ing growth 156-160 



sp., calcifugous nature 34 



Valerianate, ferric, availability to rice plants 

 in calcareous and noncalcareous soils 50-54 



Valeric acid. See Acid, valeric. 



Valin in potato protein 624 



Variations in Colletotrichum gloeosporioides 

 (paper) 723-736 



Varietal resistance to Fusarium-wilt of 

 tobacco S3°SS3 



Variety, new 118-140,521,525-536 



Vascular Discoloration of Irish Potato Tubers 

 (paper) 277-294 



Ventilation in barns 405-408 



Vermicularia — 

 circinans. Syn. Collelotrichum circinans. 

 gloeosporioides. Syn. Colletotrichum gloeo- 

 sporioides. 



" Venniculariose." See Colletotrichum cir- 

 cinans. 



Veriicillium albo-alrum, cause of vascular 

 necrosis of potato tubers 277 



Vetch nodule bacteria cultures, effect on milk. 550 



Viburnum americanum, influence of cold in 

 stimulating growth (PI. 21) 151-160 



Vicia faba — 

 composition of green and albino leaves. . . . 182 

 effect on water extract of soil 663-667 



Viehoever, Amo, Clevenger, Joseph F., and 

 Ewing, Clare Olin (paper): Studies in 

 Mustard Seeds and Substitutes: I. Chinese 

 Colza (Brassica campestris chinoleifera 

 Viehoever) 117-140 



Page 



Volatile oil in Chinese colza seed 127-132 



Volutella circinans. Syn. Colletotrichum 

 circinans. 



Walker, J. C. (paper): Onion Smudge 685-722 



Water- 

 caused to become unfree by seeds 587-593 



effect on — 



availability of iron in soil 54-58 



hypertrophy of conifers 258-262 



tempering of wheat 272-275 



extract of soil, effect of various crops .... 663-667 



Water-soluble — 

 nitrates in cropped and uncropped soils . . 663-667 

 phosphorus in wheat, changes due to tem- 

 pering 272-275 



Weed, beggar, nodule bacteria cultures, 

 effect on milk 550 



Weevil — 

 avocado. See Heilipus lauri. 

 rice. SeeSilophilus oryza. 



Welcome, C. J., etal. (paper): Further Studies 

 in the Deterioration of Sugars in Storage. 637-653 



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

 Freezing of Fruit Buds 655-662 



Western yellow pine. See Pinus ponderosa. 



Weston, William H. (paper): Another Coni- 

 dial Sclerospora of PhilippineMaize 669-684 



Wheat- 

 tempering 271-275 



See Triticum spp. 



White pine. See Pinus strobus. 



Wild crab. See Malus coronaria. 



Willard, H. F. (paper): Opius fletcheri as a 

 Parasite of the Melon Fly in Hawaii 423-438 



Wind, influence in dissemination of spores of 



Gibberella saubinetii n-12 



Wissadula — 



lozani, food plant of Zenodoxus palmii 826 



sp., food plant of Telphusa mariona 812 



Worm, scavenger. See Pyroderces rileyi. 



Wright, P. A., and Shaw, R. H. (paper): A 

 Comparative Study of the Composition of 

 the Sunflower and Com Plants at Different 

 Stages of Growth 787-793 



Wright, Sewall (paper): Correlation and 

 Causation 557-585 



Xanthium communis, shelter plant of Py- 



rausta ainsliei 839 



X-rays, effect on trichinae 845-854 



Yeasts in canned ripe olives 377"379 



Yellow pine. See Pinus ponderosa. 



Zea mays — 



effect on water extract of soils 663-667 



host of Physoderma zeac-maydis 3 T3 



host of Sclerospora spontaneum 669-684 



in storage, attacked by Rhynehophora . . 605-614 

 shelter plant of Pyrausla ainsliei 839 



Zenodochium citricolella, similarity to Pec- 

 tinophora gossypiella 817-81S 



Zenodoxus palmii, similarity to Peciino- 

 phora gossypiella 826-827 



o 



