2 4 FRUIT TREES AND THEIR ENEMIES 



"^ this, or similar preparations, than to make the material 

 5^ themselves. It should be mixed up with water in the 

 (2 same way as Paris green paste. The proportions to 



% 



be taken are- 



{ ^ (3<:) Lead arsenate paste . 3 to I2 ozs. 



I '^^ Water . . . . lO oralis. 



i<^ 



4. Arsenate of calciinn. — Tlus has been suggested 

 as a cheap substitute for arsenate of lead ; but it seems 

 to be somewhat less effective than the lead salt. 



(4) Arsenate of soda, " crystallised " 3^ ozs. 

 (or if " crude " arsenate, 2 ozs.) 



Quicklime • • • • Si ozs. 



Water 10 galls. 



Dissolve the arsenate in the whole of the water, 

 then add to it the lime, previously made into a milk 

 (see p. 36). 



Bordeaux mixture. See Copper sulpJiate. 



5. Cai'bolzc acid {Phenol). — This has been very 

 thoroughly tested both in this country and in America, 

 and the conclusion arrived at is that its value as an 

 insecticide or fungicide is too slight for it to be 

 recommended for use. It has been tried in the form 

 of a I to 2 per cent, solution in water, as well as in con- 

 junction with glycerine, soap, lime, etc. Some of the 

 much-advertised insecticides recently placed on the 

 English market consist largely of carbolic acid. 



6. Carbon disulphide. — This is a very volatile and 

 inflammable liquid, which is used for preventing insects 

 from destroying stored grain, and also for the destruc- 

 tion of insects in the soil, being then injected with the 



