234 
Pycnidia—Continued. 
Of Phoma abietina, 164. 
Produced from cultures of Fenestella, 119. 
Produced on Platanus from Fenestella spores, 
121,122. 
Pyrenomycetes, contributions to the development 
of, 53,113,181. 
Radish, cultivated, Cystopus in, 203. 
Rainfall: 
And Peronosporece, 6. 
Erysiphece not affected by, 188. 
Influence on peach-rot, 128,129. 
In Iowa in 1887 and 1888,6. 
Rainy weather: 
Effect on spotting of peaches, 33. 
Effect on cracking of fruit, 33. 
Reviews of recent literature, 39, 98,165, 216. 
Rhizomania in Ribes, 226. 
Root-mold of the vine, 90,107. 
Root-rot: 
Effects on apple-trees, 200. 
In New Zealand, 200. 
Roots, abnormal growths of, 226. 
Rose, leaf-blight of, 161. 
Rot of peaches. ( See Peach-rot.) 
Rot of timber, 175. 
Rust of: 
Ash leaves, 95. 
Clover, 161. 
Flax, 32, 215. 
Grass, 161. 
Plum trees, 38. 
Rusts whose feleutospores germinate at once after 
ripening, 217. 
Ryernot injured by Claviceps, 30. 
Saccardo’s Sylloge: 
Aim of, 24. 
Scleroderma in, 23. 
Saprophytic fungi on apricot, 222. 
Scab: 
Of apples, treatment of, 33, 35, 210. 
On potatoes, diminished, 160. 
Scabby apples, comparative size of, 213. 
Scald of peaches, 124. 
Schultze’s solution used for staining, 14,17. 
Sclerotia-. 
Of Ergot, 204. 
Of Peziza tuberosa , 224. 
On Alnus and Betula, 41. 
On Prunus padus, 41. 
Scribner, F. L., on Diseases of Irish potatoes, 
178. 
Sedges, diseased spikes of, 30. 
Septosporium on grape leaves, 69. 
Sexual organs in jEcidium, 44. 
Shepherd’s purse, mildew on, 10. 
Shipley, A. E., on Macrospot iiim parasiticum, 178. 
Shot hole fungus, 200. 
Smut: 
Avoided by rapid germination, 90. 
Beetles, 219. 
Directions for treatment with hot water, 165. 
Fungi, previous knowledge of, 87. 
Infecting oats with, while in bloom, 218. 
In oats, preliminary report on, 218. 
Losses consequent upon,166. 
Smut—Continued. 
Natural enemies of, 219. 
Of wheat and oats, 165. 
Of Zea mays , 14. 
Prevention of, 164. 
Prevention and propagation of, in oats and 
barley, 42. 
Spores in manure, 218. 
Spores in soil, 218. 
Stinking, 165,219. 
Treatment for, 89. 
Varieties of, 42. 
Smuts, injury to Western grasses and sedges, 13, 
30,31. 
\ 
Soda: 
For peach-rot, 133. 
Used for smut, 89. 
Soda hyposulphite, for apple-scab, 35, 36, 37, 210, 
212 . 
Strength of, 210. 
Soil: 
In vineyards, necessity for keeping clean, 110. 
Necessity for cleanliness of, 166. 
Treatment for oat smut, 218. 
Sorghum blight: 
Bacteria in, 43,196. 
External appearance of, 43. 
Fermentation in, 195. 
Prevention of, 43. 
Question of priority concerning, 195, 199. 
Red color in, 195,199. 
Roots diseased in, 43. 
Spermatia, function of, 104. 
Spermogonia: 
Of black-rot changed into peritliecia, 45. 
Of JJredinece, 104. 
Sphcerotheca: 
Favorable conditions for, 86. 
On Phytoptus galls, 85,134, 177,209. 
Spiny pores, characterize genus Mucronoporus, 28. 
Spore powder, amount required for a given area, 
170. 
Spores: 
Cladosporium viticolum, germination of, 94. 
Cytispora platani, 114. 
Discida platani, 56, 57. 
Fungi, dispersion of, 168. 
Uymenomycetes, a method ofpreserving 163. 
Peach-rot, 127. 
Single, cultures from, 28. 
TJstilayincce, germination of, 88. 
TJstilago, dessemination of, 84. 
Sporopycnidia, 183. 
Spotting of peaches. (See Cladosporium carpo- 
philum.) 
Spraying. (See Applications.) 
Squash, Peronospora on, 201. 
Starch, how affected by Gummosis, 226. 
Status of the Sorghum Blight, 195. 
Stinking smut, 165. 
Sulfosteatite for potato and tomato rot, 227. 
Sulphate of copper. (See Copper sulphate). 
Sulphate of iron. (See Iron sulphate). 
Sulphur: 
And lime for powdery mildew, 214. 
Compounds for peach-rot, 133. 
