450 
Spores— 
diffusion, 177. 
endogenous formation in Chalara ungeri , 
5. 
germination, discussion, 51. 
Spot disease of— 
beet, 303. 
cherry— 
notes, 192. 
treatment, 174. 
currants— 
notes, 192. 
treatment, 174. 
gooseberries, 192. 
peach, 91, 374. 
pear (See Pear leaf blight), 94. 
plum, treatment, 174. 
Spot of— 
plum fruit, 410. 
quince, treatment, 422. 
Spotting and cracking of pears, 405. 
Sprayed fruit- 
copper on, 402. 
harmless, 309. 
Sprayer Japy knapsack, notes, 39, 40, 41. 
Spraying- 
apparatus, 169, 203, 312. 
crops, 314. 
. does it pay? 109,175. 
in Illinois, 313. 
machines— 
fittings, 306. 
notes, 174, 313, 418, 420. 
tests, 308. 
orchards, 175, 310, 333, 337, 456. 
pear orchard cost, 338. 
puni]), new, 309. 
tank, description, 358. 
value of, for vines, 402. 
Spraying for— 
almond disease, 235. 
apple scab, 17. 
black rot of grape, 12. 
fungous diseases, 176. 
leaf-bliglit, 333, 338. 
prune rust, 356. 
wheat rust, 173, 196, 198. 
Starch, in fungi, 177, 315. 
Stem rot of— 
sweet potato, 160. 
tobacco, 409. 
Stinking smut of wheat— 
fungicides, 171. 
Jensen liot-water treatment, 170,171. 
Stock- 
definition, 241. 
effect of leaf-blight on pear, 242. 
in nursery experiment, 262. 
Strawberry leaf-blight— 
notes, 411. 
remedies, 174, 302, 308,411, 417. 
Straw berry— 
disease, remedy, 416. 
leaves and asphalt vapor, 378. 
mildew, treatment, 415. 
notes, 162. 
Strawberry—Continued, 
rust, 62. 
Strawsonizer, for wheat rust, 307, 308. 
Straw — 
weight in Manhattan experiment, 215. 
yield at Rockport, Kans., 219, 221, 224. 
Sugar beet— 
disease, 303,406. 
heart rot, 161. 
treatment, 416. 
Sugar cane— 
disease, 407. 
Sereh disease, 295. 
Sulphate of— 
copper. (See Coppei sulphate.) 
iron solution— 
description, 174. 
treatment for wheat rust, 218. 
Sulphosteatite— 
adhesiveness, 204. 
cupric, 175. 
experiments, 312. 
notes, 202. 
Sulphur— 
adhesiveness, 204. 
and lime treatment for wheat rust, 218, 219. 
flowers of, 202. 
treatment for wheat rust, 218. 
Sun scald in orchard trees, 403, 405. 
Sweden— 
first appearance of Puccinia malvacearum 
327. 
fungi, 322. 
Sweet potato black rot— 
characteristics, 2. 
conidia, 3. 
coniaiophores, 6. 
cultures, 3. 
distribution, 1. 
extent of damage, 1. 
external appearance, 2. 
inoculations, 9. 
Macroconidia, 5. 
Microconidia, 5. 
mycelium, 5. 
notes, 1, 55, 300, 411. 
preventive measures, 9. 
probable life history, 9. 
Pycnidia, 3, 8. 
Pycnospores, 3, 8. 
spores, 7. 
Sweet potato— 
diseases, 419. 
effect of Bordeaux mixture, 174. 
experiments, 299. 
soft rot, 56. 
soil rot, 300. 
stem rot, caused by a new Nectria, 160. 
Swingle, J. F., 214. 
Swingle, W. T., 109, 395. 
Sycamore blight, 95, 413. 
Sylloge Fungorum, prize for, 153, 293. 
Symbionts, definition, 388. 
Symbiosis- 
in fungi, 428. 
root, 387. 
