986 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



in 1886, and has since been largely employed for potatos and other plants 

 subject to fungoid diseases. 



In the case of spraying with combined insecticide and fungicide, the 

 poisonous insecticide should be carefully mixed with water to form a 



Figure 6. 



Fig. 224. 



thick paste, afterwards diluted and added to the wash. Paris green and 

 green arsenite are used at the rate of about 4 oz. to 40 gallons of water ; 

 some use 8 oz. and some use as much as 1 lb. to the cask of 40 gallons. 



Fig. 22."). 



Lead arsenite (another good insecticide) may be used in the same pro- 

 portion. Paris green and London purple, if used alone in water, should 

 have an equal amount or even twice the quantity of lime added, to prevent 

 the possibility of burning the foliage, flowers, or fruit. 



