Vm TABLE OF CONTENTS. 



CHAPTER I. 



Wateu, Hot and Cold — Submersion of Field, Forest, and Vineyard — Scalding — 

 Hydrogen Peroxide. 



PAGE 



1. Water, H^O 23-24 



Use 23 



Cold Water. 



Submersion of fields and meadows 24 



Submersion of forests 24 



Anti-phylloxeric submersion 25 



Submersion in actual practice .-.--.-. 26 



A. Winter submersion --------- 27 



B. Submersion during the active period of the vine - - . - 27-30 

 Spraying 30 



Hot Water. 



Resistance of insects to heat 31 



Resistance of seed to heat 31 



Resistance of fungi to heat - -------- 31 



Action of dry and moist heat on seeds and spores ----- 31 



Uko of hot water --------... 32 



Hot-water steeping of seed-corn to kill disease spores - - - - 32-36 



Immersion of seed against insects, phylloxera ----- 36 



Hot-water spraying against cochylis, etc. 37-40 



2. Hydrogen Peroxide, HoCj 40 



Preparation ------------ 40 



Properties 40 



Use . - - - 40 



CHAPTER II. 



Hydrogen Sdlphidk — Sulphur. 



3. Hydrogen Sulphide (sulphuretted hydrogen, HjS) 41-2 



Preparation 41 



Properties -----....... 41 



Action on plants ----------- 41 



Action on insects - - - 41 



Use - 42 



4. Sulphur, S. 



Preparation - - 42-4 



Use 44 



How does sulphur act ?--.-----.- 44 



How should sulphur be applied ? 46 



The regulator sulphur bellows (illustrated) 47 



The torpedo sulphur distributor 47 



Use against bacteria (potato scab, etc.) .------- 47 



Use against fungi (rusts and mildews) 48-50 



Drawbacks to sulphuring --.----.. 50 



Use of sulphur against insects 52 



Use against acari - - - - .53 



CHAPTER III. 

 Carbon Bisulphide, CS.j. 



5. Cauuon Disulphide, CS.j 54 



Preparation 54 



Properties ----.--..--- 54 



Action of carbon disulphide on plants 55 



