The possibility of controlling 0. moubata by feeding hosts 

 on certain chemicals was explored by~De Meillon (194.6^ Fifty 

 mgm. of ptrre gamma isomer of gammexane were mixed with agar and 

 water and fed to rabbits four or five times. The ticks fed only 

 briefly and showed either incoordination or death afterwards. 

 The domesticated tampan's predilection for humsin blood obviously 

 limits the application of this interesting approach, 



0, moubata is al^o susceptible to arsenic conqxjunds in the 

 blood of animus. Injections of neoarsphenamine have been used 

 in rabbits for this purpose (De Meillon, Thorp, and Hardy 19A8). 

 The failure of 2:3 dimercaptopropanal (British anti- lewisite) 

 to ELlter the toxicity of neoarsphenamine was described by Thorp, 

 De Meillon, and Hardy (1948), 



In testing insect and tick mortality when exposed to dry 

 insecticidal film, Busvine and Barnes (194-8) fo\and that 0, moubata 

 nymphs are resistant to DDT but susceptible to garamexane''and 

 pyrethrins. Busvine and Nash (1953) also determined that films 

 of oil solutions are better than dry films for testing insecticides 

 because they give a sharper dose/kill relation. 



The value of certain derivatives of phenol and naphthalene 

 as soil-fumigants in hut floors has been suggested (Robinson 



Derris powder failed to affect nymphal 0, moubata in Riissian 

 laboratory tests (Mironov, Nabokov, and Kachalova 194-6), Pyrethrum 

 sprays and dusts are highly toxic (Robinson 1942C,D ,194-38, 19A4B) 

 but field tests have not been undertaken, probably due to high 

 cost of pyrethrum and effectiveness of cheaper BIC , 



Sulfur dioxide or cyanide fumigation has little effect on 

 0, moubata , and sprays of kerosene and formalin are not success- 

 Tul (Hopkins and Chorley 194-0), A spray consisting of 30 cc, 

 tvcrpentine, 50 cc, twenty-five percent alcohol, 5 cc, kerosene 

 and a little white soap was suggested by these authors, though 

 it is expensive and troublesome to prepare. Their best re- 

 commendation was a coarse, roughly filtered spray consisting 

 of l|- pounds of paradichlorobenzene in one gallon of kerosene 

 applied under high pressure at the rate of twelve to fourteen 

 gallons per two thousand square feet of surface (also reported 

 by Hargreaves 1936), 



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