CHAPTER V 

 FUNGICIDES AND INSECTICIDES 



The following Formula. 1 have been compiled from many sources, several 

 of the most common being derived from the leaflets issued by the Board 

 of Agriculture and Fisheries. By the kind permission of the editor several 

 others have been taken from volume xxxiv. part iii. of the Journal of the 

 Royal Horticultural Society ; these are marked with an asterisk (*). Many of 

 the variations of Formula? are the results of years of patient experiment, 

 and experts are agreed that we have yet much to learn in the matter of 

 spraying for the eradication of pests. In the meantime there is great truth 

 in the remarks of two of our well-known experts when they say, " The 

 grower must know what to spray for, what to spray with, and when to do 

 it." It is hoped that this chapter will give a few useful hints to those who 

 may be on the look-out for simple remedies. Those more especially in- 

 terested in the question of spraying of fruit-trees may be referred to the 

 above-mentioned Journal, which contains a full account of the admirable 

 papers read at the Conference held in October 1908. 



Ammoniacal Carbonate of Copper. Useful in epiphytic diseases, such as 

 Rose Mildew. 



I. Dissolve 5 ozs. carbonate of copper in 14 pint water; slowly add 3 

 pints strong aqua ammonia ; dilute with water to 45 gallons. 



II. Mix 1 oz. carbonate of copper and 5 ozs. carbonate of ammonium, 

 and dissolve in 1 quart hot water; add 1G gallons cold water. 



III. Mix 3 ozs. sulphate of copper and 3 ozs. carbonate of soda with 

 1 quart concentrated ammonia ; when all action ceases dilute with 22-28 

 gallons water. 



Arsenate of Lead. Destruction of caterpillars. 



I. Roses. Arsenate of lead (98 per cent.), 2| ozs. ; arsenate of soda 



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