396 STATE BOARD OF AGRICULTURE. 



Dissolve the copper sulphate in about five gallons of water and the soda or 

 lye in ten or twelve gallons. Pour the soda solution into the copper solution while 

 stirring. "When about two-thirds of the lye solution has been added test with red 

 litmus paper and cease to add any more of the alkali as soon as the paper turns 

 blue. Then add the lime previously slaked and diluted, after which water is to 

 be added sufficient to bring the mixture up to 30 gallons. 



This fungicide was first used in 1S95 by Prof. Halsted of New Jersey, who 

 has given it subsequent trials with very satisfactory results. The small amount 

 of lime which it contains gives it considerable advantage over the ordinary 

 Bordeaux mixture in the ease of application and the almost total absence of any 

 unsightly coating, hence it is adapted to use on fruits just before maturity. 



Persons who use Soda-Bordeaux for the first time are advised to make a 

 thorough test upon a small scale, with one or two plants, before the application 

 is made general. 



SODA-BORDEAUX WITH PARTS GREEN. 



It has been satisfactorily demonstrated that Paris green may be combined with 

 Soda-Bordeaux even to the extent of one pound to one hundred gallons, "a much 

 higher percentage than is usually employed," without harmful effects on foliage. 



copper sulphate solutions, 

 (strong) 



A. Copper Sulphate 1 pound 



Water 25 gallons 



This strong solution is for use on trees and shrubs before the leaf buds open 

 in spring. After the leaves appear it should not be used as the foliage would 

 be killed by it. 



(weak) 



B. Copper Sulphate 1 pound 



Water 2.50 gallons 



C. Copper Sulphate 1 pound 



Water 400 gallons 



The above solutions are recommended by Professor Taft as being very service- 

 able and safe. No. B may be used without danger to the foliage of any except 

 the most tender plants. For the peach and equally tender kinds the No. C solu- 

 tion may be used. These solutions possess the advantages of easy preparation 

 and application and do not discolor the foliage and fruit as does the Bordeaux 

 mixture. They may therefore be used when the fruit is maturing and in the 

 latter part of the season when the foliage is less tender. 



AMMONIACAL SOLLTION OV COPPER CARBONATE. 

 CUPRAM. 



Copper carbonate 1 ounce 



Ammonia — Enough to dissolve the copper. 



Water 12 gallons 



Dissolve the copper carbonate in the ammonia with constant agitation. This 

 may be kept for a considerable time, in stoppered bottles and when wanted diluted 

 with the proper proportion of water as given above. The strength of ammonia 

 as generally obtained is apt to vary considerably. The strength usually recom- 

 mended is the 22° or 26° Baume. If these are used a less amount is required 

 than that generally sold, otherwise the preparation is the same. 



A modified form of the above solution may be prepared by using: 



Copper Sulphate 2 pounds 



Carbonate of Soda (Salsoda) 2^2 pounds 



Dissolve each salt in two gallons of water then mix. The copper is precipi- 

 tated in the form of carbonate and if allowed to settle may be collected and dried 

 after pouring off the water. Or enough ammonia may be added to dissolve the 

 copper carbonate and diluted with water to 40 gallons. 



