CHAPTER III. 



FUNGICIDES, FOR PLANT-DISEASES. 



The results obtained from the use of any insecticide 

 or fungicide depend much upon the operator. Timeli- 

 ness, thoroughness, and ]}ersistence are the watchwords 

 of success. It is easier to keep an enemy away than 

 to drive him away. The worst foes are often the 

 smallest ones, and the injury is often done before they 

 are detected. Be ready, and begin early. Few people 

 spray with sufficient thoroughness. 



The two most important fungicides are ammonia- 

 cal carbonate of copper and Bordeaux mixture. The 

 former is cheaper and more easily applied. The latter 

 is more adhesive and generally the best. It may be 

 applied even in the rain to advantage, when fair 

 weather does not present itself. In case any disease 

 is not mentioned, or you are in doubt and cannot secure 

 advice, use one or the other of these preparations. 



Copper carbonate costs from 40 to 60 cents per pound. 



Copper sulphate costs 4 to 6 cents per pound. 



Ammoniacal carbonate of copper. — 1. Carbonate copper, 

 1 ounce ; and ammonia (^ to 1 quart) enough to dissolve 

 it. The best ammonia water to use for dissolving copper 

 carbonate is made by using 1 volume 26° Beaume, with 7 

 or 8 volumes of water. It can be kept indefinitely in 

 corked bottles. Dilute with 9 gallons of water when 

 wanted. This is the handiest formula. 

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