402 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



FUNGICIDES 



are mixtures which are applied to diseased plants either to prevent or 

 mitigate the ravages of fungoid parasites — if in a fluid form by sprinkling, 

 spraying, or sponging the foliage ; and if in powder by dusting it over the 

 plants or the soil, as the case may require. 



Fluid. 



A mmoniacal Carbonate of Copper. — Mix three ounces of sulphate of 

 copper, and three ounces of carbonate of soda, with one quart of concentrated 

 ammonia, and as soon as all action ceases dilute with twenty-two gallons 

 of water. Some persons advocate the dilution with twenty-eight gallons 

 of water as being less injurious when applied to fruit. 



May be used in greenhouses, and is especially useful in epiphytic 

 diseases, such as Rose mildew, Hop mildew, and other Eri/siphcei and 

 surface moulds, like Oidium. 



Arsenical Solution, — One ounce of arsenic dissolved in a little alcohol 

 and mixed with 100 gallons of water. 



This is recommended in America for spraying Carnation rust, but it 

 must not be used on fruit trees or plants, on account of its poisonous 

 nature. 



Berichonne Mixture, — Dissolve six and a half pounds of sulphate 

 of copper in four gallons of hot water. In another vessel dissolve 

 seven and a half pounds of carbonate of soda. When cold mix the 

 two solutions and add oiuwpint and three quarters of liquid ammonia. 

 Dilute with water to make foVty-four gallons. 



Similar in use to amnioniacal carbonate of copper. 



Bordeaux Midi arc. — Sulphate of copper sixteen pounds dissolved in 

 twenty-two gallons of water. Thirty pounds of lime dissolved in six 

 gallons of water. When the lime-and- water is cold mix the two solutions 

 together slowly and thoroughly. 



The above is the original formula, of which the following is a modi- 

 fication : — 



Sulphate of copper six pounds, dissolved in four gallons of hot water. 

 Four pounds of lime dissolved in four gallons of cold water. When the 

 solutions are cold mix thoroughly, and when desired for use dilute to 

 twenty-two gallons with cold water. 



Air-slaked lime should never be used, since it injures the foliage. 



This is considered to be the cheapest and best all-round fungicide ; 

 indeed general testimony is that " it is the most effective fungicide 

 known." 



Condi/' s Fluid. — See Potash Permanganate. 



/•.'</// Celeste, or lUue Water. 1 Hssolve one pound of sulphate of copper 

 in three or lour gallons of warm water. When completely dissolved, and 

 the water has cooled, add one pint of liquid ammonia, then dilute to 

 twenty-two Dillons. The concentrated liquid should be kept in a keg, or 

 BOme wooden vessel, and diluted when required for use. 



