SPRAYING 211 



(b) Ammoniacal Copper Carbonate. 

 The objection to the use of Bordeaux is 

 that it stains the leaves and foliage of the 

 sweet pea plant. This is not a serious ob- 

 jection when sweet peas are grown for 

 seeds or even commercially as a cut flower. 

 However, when grown in conservatories 

 or in public parks for ornamental purposes, 

 the use of Bordeaux becomes objection- 

 able. In this case ammoniacal copper car- 

 bonate may take the place of Bordeaux, 

 since the former is a colorless material. It 

 is prepared as follows : 



Copper carbonate 50Z. 



Ammonia (26° Baume') 3 pints 



Water 50 gallons 



This fungicide should be used as soon as 

 it is made, as the ammonia evaporates 

 quickly. 



(c) Potassium Sulphide. This is a 

 valuable fungicide for the control of the 



