CHAPTER VIII. 



PREPARATION, COMPOSITION, AND GENERAL CHARACTERS OF 



THE SPRAYS USED. 



PREPARATION OF THE COPPER SPRAYS. 



It is not the intention to consider in this place the many forms of 

 copper sprays which have been used at one time or another in the 

 treatment of fungous diseases, but to confine the discussion to those 

 forms tested in the present work. 



Most of the formula for those copper sprays which have been tested 

 in the treatment of peach leaf curl have been personally prepared at 

 one time or another and the results they gave have been carefully 

 studied. Several other formula have been recommended by the writer, 

 but these were prepared and applied by the growers themselves, so 

 that for the results of this work their reports have been consulted. 

 There are still a few other formula for copper sprays which have 

 been reported upon, but these are the suggestions of others or were 

 chosen ])y the growers themselves. 



The different copper sprays which have been tested in separate form 

 (not in union with other fimgicides) are shown in the following list. 

 This list includes 22 distinct formula. Each formula is that used with 

 45 gallons of water, except the first for Bordeaux mixture, which was 

 with 48 gallons; 



Table 41. — Copper sprays applied for the control of peach leaf curl. 



Copper sulphate solution: 



* 4 pounds copper sulphate, 45 gallons water. 



* 2 pounds copper sulphate, 45 gallons water. 

 Bordeaux mixture: 



t24 pounds copper sulphate, 45 pounds lime. 



"^ * 6 pounds copper sulphate, 15 pounds lime. 



j 5 pounds copper sulphate, 15 pounds lime. 



*3 pounds copper sulphate, 15 pounds lime. 



X 6 pomids copper sulphate, 10 pounds lime. 



* 5 pounds copper sulphate, 10 pomads lime. 



* 3 pounds copper sulphate, 10 pounds lime. 

 *5 pounds copper sulphate, 5 pounds lime. 



* 4 pounds copper sulphate, 5 pounds lime. 



* 3 pounds copper sulphate, 5 poimds lime. 



« 



* Prepared and tested by the writer, and in many cases also tested by growers. 

 t Chosen and tested by grower. 



t Recommended by the writer, Ijut tested by the growers. 

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