July x-Sept. 30,19x8 
Index 
621 
Sunflower. See Helianihus annuus. Page 
Susceptibility and Resistance to Citrus-canker 
of the Wild Relatives, Citrus Fruits, and 
Hybrids of the Genus Citrus (paper).337-358 
Sweet potato. See Ipomea batatas. 
Swine- 
Susceptibility to coccidioidal granuloma. 536-539 
toxicity of cottonseed products to. 449 
Syanthedon pictipes, female, at light traps.. 146-148 
Tangelo, resistance to Citrus-canker. 351 
Terminalia — 
catappa, food plant of Ceratitis capitata. .. 606-608 
chebula, food plant of Ceratitis capitata _606-608 
Tetramyxa — 
palustre, tissue invasion by. 569 
Parasitica , tissue invasion by. 569 
triglochin, tissue invasion by. 569-570 
Tetrastichus giffardianus, parasite erf Ceratitis 
capitata . 606-610 
Thevetia neriifolia, food plant of Ceratitis capi¬ 
tata . 606-608 
Tilling, deep, effect on crops in Great Plains 505-517 
Tissue Invasion by Plasmodiophora brassicae 
(paper). 543-572 
Toxic culture filtrate, value in immunization 
against blackleg. 261-26 2 
Toxicity, cottonseed products..425-452 
Toxin, symptomatic anthrax, concentration 363-264 
Toxoptera graminum, life history. 97-110 
Triglochin — 
host of Tetramyxa palustre. ... 569 
palustre , host of Tetramyxa palustre . 569 
Triphasia trifolia, resistance to Citrus-canker. 341 
Triticum — 
aestivum — 
effect of— 
deep tilling in Great Plains on. 505-517 
soil dynamiting in Great Plains on.. 505-517 
subsoiling in Great Plains on.484-504 
host plant of Pucoinia graminis tritici. . m-124 
resistance of seeds to desiccation. 527-532 
silage of, acidity.400-408 
wheatscab on, when grown following in¬ 
fected corn. 611-612 
dicoccum, host plant of Pucdnia graminis 
tritici . 118-119 
spp.— 
coefficients of correlations between— 
plant characters.380-389 
weight of seed and resultant plant char¬ 
acters. 372-376 
effect of environment during growth... 366-376 
seed, relation of weight to resultant plant 
characters. 376-380 
variations.359-391 
vulgare — 
host plant of Pucdnia gramtnis tritici ... 117-121 
syn. Triticum aestivum. 
True Nature of Spinach-Blight and the Rela¬ 
tion of Insects to Its Transmission (paper). 1-60 
Trypanosoma equiperdum , recovery from 
blood of rats. 574-576 
Trypanosomes, recovery from blood of rats. 573-5 76 
Turner, W. B. (paper): Female Lepidoptera 
at Light Traps. 135-149 
Turnip, curly. See Brassica rapa. Page 
Two Important Introduced Parasites of the 
Brown-Tail Moth (paper). 191-206 
Vaccine, “ germ-free/' value in immunization 
against blackleg... 253-262 
Variation and Correlation in Wheat, with 
Special Reference to Weight of Seed Planted 
(paper).359-392 
Variations in the Moisture Content of the 
Surface Foot of a Loess Soil as Related to 
the Hygroscopic Coefficient (paper).453-480 
Vigna sinensis , whitespot disease of. 598 
Waianae Mountains, coffee collection in, in 
1917. 610 
Wampi. See Clausena wampi. 
Water. See Moisture. 
Watercress. See Roripa sp. 
Water-Holding Capacities of Bedding Mate¬ 
rials for Live Stock, Amounts Required to 
Bed Animals, and Amounts of Manure 
Saved by Their Use (paper). 187-190 
Weather, relation to moisture content of loess 
soil. 454-457 
West Indian medlar. See Mimusops elengi. 
Wheat. See Triticum spp. 
Wheatscab on wheat following infected 
corn. 61i-6ia 
Whisenand, J. W. (paper): Water-Holding 
Capacities of Bedding Materials for Live 
Stock, Amounts Required to Bed Animals, 
and Amounts of Manure Saved by Their 
Use. 187-190 
White sapote. See Casimiroa edulis. 
Whites pot- 
control of. 602 
disease of conifers and other plants.595-604 
resemblance to damping-off disease of 
plants. 595 
Wild rice. See Zizania palustris. 
Willard, H. F., and Pemberton, C. F. (paper): 
Work and Parasitism of the Mediterranean 
Fruit Fly in Hawaii during 1917.605-610 
Willow. See Salix spp. 
Withers, W. A., and Carruth, F. E. (paper): 
Comparative Toxicity of Cottonseed Prod¬ 
ucts.. 525-452 
Wood, yellow. See Ochrosia eUiptica. 
Wool, influence of humidity upon. 285-295 
Work and Parasitism of the Mediterranean 
Fruit Fly in Hawaii during 1917 (paper). 605-610 
Xanthoxylum Bungei , resistance to Citrus- 
canker. 340 
Veliow oleander. See Thevetia neriifolia. 
Yellow-wood. See Ochrosta eUiptica. 
Zea mays — 
. effect of— 
deep tilling in Great Plains. 505-517 
soil dynamiting in Great Plains. 507- 
508,512-514 
subsoiling in Great Plains.481-521 
rootrotof. 611-612 
silage of, acidity.395-409 
Zizania palustris , susceptibility of seeds to 
desiccation. 526 
Zygorhynchus sp., causal organism of stem 
lesions of Solanum tuberosum . 216-219 
