Xll TABLE OF CONTENTS, 



PAGE 



Steepinij; of seed-corn -..-.-.... 114 



Sprajin^' -wMh dilute solutionB 115-6 



Use against insects - - 116-7 



32. Potassium CnLORiDE (muriate of potash), KCl ; Potassium Sulphate, K0SO4. 



Natural occurrence - - - - - - - - - - 117 



Properties 118 



Action on plants 118 



Use - 118-120 



Use as weedkiller 118 



Use as pickle for seed-corn 119 



Use agaiust dodder 119 



Use against meadow horsetail 119 



Use against insects 120 



33. Nitrate of Potash, KNO3. 



Occurrence 120 



Preparation 120 



Properties ---......... 120 



Action on plants -----.-..-- 120 



Action on fungi 120 



Action on spores 121 



Use against insects - - * - - - - - - - - 121 



34. Cakbonate of Potash, K2CO3. 



Preparation 121 



Properties 121 



Action on plants 121 



Action on fungi 122 



Action on insects ----------- 122 



35. Potassium Sulphocarbonate, K2CS3H2O. 



Preparation 123 



Properties 123 



Action on plants - - 123 



Action on fungi ----------- 124 



Action on insects 124 



Use 126-9 



Disinfection of vines and graft-bearers by - 129 



36. Xanthogenate of Potassium, CjHbOCSSK. 



Definition 129 



Preparation - 129 



Properties 129 



Use 129 



37. Potassium Cyanide, KCN. 



Preparation ------ ------ 130 



Properties 130 



Rapid toxic action 131 



Action on plants 131 



Trials on healthy vines 131 



Trials as a weedkiller - - 132 



Action on fungi ----------- 132 



Action on insects - - 132 



Use 133 



Cyaniding of trees 133 



Use against insects - - - - - - - - - -134 



Fumigating vines ----.-.---- 134 



Disinfection of vines 136 



38. Potassium Sulphocyanide, KCNS. 



Preparation 136 



Properties .---.-..---- 136 



Action on plants 136 



Trials as a weedkiller I3(j 



Trials on healthy vines in pot 137 



Action on fungi -.-.--.--.- 137 



Action on insects 137 



