^^0 LOCUSTS, HOPPERS, SUllPACE BEETLES, fil^C. 



['6) AVliere white-ants are prevalent, tlie -woodwork of a house 

 can be protected by a liberal application oi: any form of arsenic to the 

 door-frames, Avindow-frames, wooden pillars or any exposed wood, as 

 well as to the floors w4iere this is possible. Several forms of arsenic 

 are procurable in the bazaars (white arsenic, sambul, somal, sanha, etc, 

 yellow arsenic, lartal, etc.), which can be ground up very fine, mixed 



with water and poured on. If the 



floors of all buildings were treated 



with a solution of white arsenic 



(formula No. 14) before the top layer 



is put on, no white-ants would come 



up through the floor at any time. 



Termites will not oat through anything 



impregnated with arsenic and will 



leave their tunnels if a solution of 



Fia. 275. arsenic comes near. In these cases 



Worker Termites of two hinds helonffing ,, nnfdrlp walk in 



to one nest. (Magnified.) ^^^^7 ^^J ^^^^ "P OUtSlQe wailS in 



their covered ways, and will then enter 

 the building if possible. No application of arsenic will check this. 



(4) If a house is infested with white-ants little can be done. If 

 their tunnels or entrances can be found, this can be destroyed and the 

 places treated with arsenic. If they have a nest outside and come into 

 the house, their entrances to the house should be searched out. Fumi- 

 gation with hydrocyanic acid or carbon bisulphide is as fatal to termites 

 as to all other insects, and where possible every infested building should 

 be fumigated, search made for the termites^ tunnels, and their future 

 entrance prevented by the use of arsenic. 



(5) In fields infested with termites, crops 'are occasionally attacked, 

 especially sugarcane, wheat and ground-nut. If the nest cannot be found, 

 the termites can be discouraged before the crop is planted, by cultiva- 

 tion* Such crops as sugarcane, planted from setts, can be protected 

 by the treatment of the setts. A cane sett dipped in sanitary fluid, 

 fcti-ong soap or copper sulphate [tiUia) solution or crude oil emulsion, 

 Will not usually be attacked by white-ants. This is a very simple and 

 oiitirely efltective treatment. Such vegetable substances as castor cake, 

 ksafoetida [Jiing), dekamali gum, etc., are less effectual but still have 

 some effect in deterring wliil cants. 



Similar but less lasting results follow from the impregnation of 

 the irrigation water tvitli small cpiantities of poisons. It is necessary 

 to use those which will have no permanent effect on the soil or crop. 

 Crude oil emulsion, sanitary fluid, kerosene oil^ pure or in emulsion, are 



