900 



Sphagnum 187, 249, 256 



— peat in horticulture 261 



Sphakelltinos 42 



SpHoceae pouii Fr 168 



Spinacla olcracea 147 



Spiraca 105 



— Canker 598-600 



Spirah'smus Mor 334 



Splitting of cucumbers 462 



Sporodcsmium 710 



Spraying. Intumescence 441, 762 



Spring growth. Freezing 559-62 



— winds, Raw. Danger 479 



— wood 774 



Sprouting of fruit 375 



— of the stock 376, 378, 785 



Spruce. Layering 253-54 



— Sinker formation 255 



— Stilt growth 92-94 



— Top blight 91 



— Usefulness 253-56 



Stalks. Lodging 542 



Staminody 342 



Starch formation 299 



Statistics of plant diseases 71 



Statocytes 858, 859 



Stem browning of cotton 228 



Stercum liirsufuin. W'illd 614 



Siencjmntocystis nujra. Lack of 



potassium 300 



Sterilc-hcad condition dwa to frost. .542-47 



Sterility 289-92 



Sterility, Hereditary 291 



Sterility due to drought 290 



Stilbum 54 



Stilts. Growth 92-98 



Stilts on pines 94 



Stimuli. Traumatic 885 



Stock, Grafting. Dwarf 105 



Mutual influence of scion 



and 841-47 



Sprouting 376. 378, 785 



Yellowing 284 



Stone fruits. See Pomes. 



Stones in soil. Significance 236 



Stoniness of pears 170-74 



Storage of winter apples 323 



Strain wood 553 



Stratification 159, \o- 



Straw. Fxcessivc growth in grain 365 



— Fertilization 269 



Street planting I53-5.t 



Streets. .Asphalting 106 



Strcptothrix species. Humus ferment- 

 ing organisms 272 



Strophomania 334 



Stunting of plants 1/5-77 



— of trees, due to wind tictinn 474 



Substrata, Xutritive. for parasites 17 



Suckers 331 



Suffocation due to lack of oxygen 313 



Sugar. Accumulation due to lack of 



light 668 



— Blocking due to lack of light 667 



Sugar beets. Root blight 220-26 



Sugar cane. Cobb's disease 696-97 



Diseases 227-28 



Sugar Cane. DongkcUancicktc 228 



Effect of lack of calcium 304 



Leaf spot disease 22S 



Powdery disease 696 



Root rot 227-28 



Rusts 696 



Sercli disease 692-96 



Suillus 53 



Sulfarin. Effect of use 372 



Sulfate of iron 192 



Sultkl, Hydrogen 98, 741, 742 



— Iron 250 



— Sodium 741 



Sulfur. Lack. Changes due to 312 



Sulfur, Metallic. Poisoning of the 



soil 250-51 



Sulfuric acid. Free 250, 881 



Sulfuric acid for soaking hard seeds... 421 



Sulfurous acid 718-24, 884 



Summer defoliation 347, 411, -661 



— drought. Effect 501 



— rust of hops 282 



Sun cracks 647-48 



Sunburn. Blisters 642 



— Failure of seeds 643 



— Injury to bark 647 



— Injury to buds 645 



— Injury to grapes 646-47 



— Seed cracking 647-48 



Sunburn in blossoms 645-46 



— in Cliz'ia nobilis 643 



— in fruits 645-46 



— of leaves in nature 641-43 



— spots on conservatory plants. . .643-^4 

 Sunlight. Effect of increased intensity. 75 



Superphosphates 768 



.Surface wounds 831 



Swamps. Conversion of land into. .. 196-98 



Sweet potatoes. F'avorable soil 232 



Symbionts. Graft callus formation 887 



Symbiosis. Antagonistic 11 



— Mutualistic 11 



Symphoria 105 



Symptomatics 7 



Syringa. Twisting 177 



Taaretes 147 



Tail-rot of beets 697 



Tainarix gallica. Wind bending 474 



Tan disease 209-19 



Apple 210-13 



Cherry 213-17 



Plum' 218 



Tannic substances 151 



Taphrina. Fr T46. 179 



Tar coating. Injury 756 



— fumes 732-35 



— vapor 737 



Taro. Favorable soil 232 



Taste, Watery, in fruit 323 



Taxtis haccata 254 



Tea. Shrivelling disease 692 



— Unfavorable soil 231 



Tears, Frost, Internal 569 



Tears due to drought 568 



Tccoiiia radicans. Fasciation 334 



Temperature. Fluctuations 88. 504. 506 



