INDEX 
Spraying—contd. 
effect on the plant, 187. 
the process of, 185. 
Spraying, dusting and sterilization, 194. 
Spreaders, 176, 183. 
Steam sterilization, 90, 156. 
box and grid method, 156. 
drain-pipe method, 164. 
small grid method, 158. 
tank method, 162. 
tray method, 160. 
Stem diseases, 88. 
Sterilization : 
by baking, 166. 
by drying, 169. 
by chemical compounds, 167. 
effect on plant disease, 172. 
of propagating soil by formalde- 
hyde, 168. 
with cresylic acid, 167. 
Sterilization of water, 173. 
Sterilized soils: 
ammonia production in, 155. 
Stigmonose, 52. 
Stone, 19, 20. 
Straw manure : 
as a carrier of disease, 30. 
necessity of obtaining 
material, 30. 
Strawberry mildew, 34. 
** Streak ” disease, 132. 
** Stripe ” disease of the tomato, 46. 
control of, 133. 
effect of ‘‘ damping ”’ on, 130. 
effect of forced and slow growth 
clean 
on, 130. 
effect of manurial treatment on, 
129 
effect of nitrogenous fertilizers 
on, 47. 
effect of potash on, 47. 
organism causing, 132. 
symptoms of, 131. 
Striped cucumber beetle, 123. 
Sulphur fungicides, 181. 
“Summer ”’ spores, 54. 
Sunburn of tomato fruit, 35. 
Surface drainage, 16, 60. 
Surface moisture, 26. 
Surface sterilization with hot water, 164. 
Sweet pea, 84. 
downy mildew of, 113. 
Rhizoctonia root rot of, 71. 
Verticillium wilt of, 83. 
Sycamore, 84. 
Talc, 148. 
Temperature : 
difference between soil and air, 23. 
effect on disease, 23. 
relation to humidity, 25. 
207 
Temperature—contd. 
maximum, 38. 
minimum, 38. ~ 
optimum, 23, 37. 
soil, 23. 
in relation to different stages of 
growth of the same plant, 23. 
in relation to disease resistance, 35. 
in relation to plant growth, 35. 
in relation to the plant and patho- 
gen complex, 37. 
of soil covered by straw mulch, 27. 
The soil, 43. 
aeration of, 45. 
artificial aeration of, 45. 
degree of compactness of, 45. 
physical conditions of, 44. 
ramming of, 45. 
the chemical conditions of, 45. 
the food holding capacity of, 44. 
the texture of, 44. 
the water holding capacity of, 44. 
in relation to disease, 44. 
“Tip burn ”’: 
of lettuce, 34. 
method of combating, 35. 
of the tomato, 34. 
Tissues: maturing of, 23. 
Tomato, 24, 84. 
bacterial wilt of, 134. 
Botrytis stem rot of, 90. 
Grand Rapid’s disease of, 135, 
hollow stem of, 51. 
leaf spot disease of, 103. 
** Nailhead ” spot of, 120. 
Macrosporium disease of, 119. 
mosaic disease of, 142. 
potato blight of, 118. 
sleepy disease of, 73. 
stem canker of, 90. 
‘stripe ’’ disease of, 127. 
Verticillium wilt of, 73. 
Tomato fruits : 
Botrytis rot of, 115. 
brown rot of, 137. 
“ buckeye ” rot of, 114. 
Fusarium rot of, 117. 
soft rot of, 136. 
sunburn, 35. 
Penicillium rot of, 117. 
Rhizoctonia rot of, 115. 
Rhizopus rot of, 116. 
Tomato mildew, 14, 100. 
conditions favourable to, 101. 
control of, 102. 
Tomato seedlings: 
“damping off ” of, 56. 
“Tops,” $4: 
Training, 28. 
Transpiration, 23. 
Tulip blindness, 53. 
