EXPERIMENTS AGAINST CHICKEN LICE AND DOG FLEA. 



13 



WASHES. 



Table VI gives the results of tests with emulsified disinfectants 

 used as washes against the dog flea. 



Table VI. — Results of tests with sprays used as fumigants against the dog flea. s 



Test 

 No. 



Phenols. 



Other ingredients. 



Method of treatment. 



Num- 

 ber of 

 dogs. 



Dura- 

 tion 

 of test. 



Killed or 

 repelled. 



1 



Per cent. 

 16.16 

 7.32 

 5.00 



4.15 



2.17 





Confined in painted box. . . 

 Confined in sprayed box. . 

 Wrapped in sprayed blan- 

 ket. 

 do 



do 



1 

 2 



2 



1 



1 



Hours. 

 1 

 i 

 2 



2 



Per cent. 

 100 



2. . . 



Coal-tar distillate 



100 



3 



4 



do 



Benzol, naphthalene, tar acids, 

 pyridine. 



100 

 100 

 100 











These emulsified disinfectants proved to be very effective when 

 used as washes at a dilution not to exceed 1 to 130 (2 tablespoonfuls 

 to a gallon). Where dogs are regularly washed, as they should be, 

 this method of treatment offers an easy and effective means for the 

 control of fleas, since the emulsified coal-tar disinfectants are obtain- 

 able at almost any drug store and can very readily be added to the 

 bath water. 



DIPS. 



Eight dipping tests were made with emulsified coal-tar disinfectants 

 and, as might be expected, they were found to be effective at about 

 the same strength as when used as washes, i. e., 1 part to 130 parts 

 of water. At the rate of 1 to 200 in two tests only 20 per cent of the 

 fleas were killed or repelled. 



LIQUD3S USED AS FUMIGANTS. 



Table VII gives the results of tests with liquids used as fumigants: 



Table VII. — Results of tests with sprays used as fumigants against the dog flea. 



Test No. 



Phenols. 



Other ingredients. 



Method of treatment. 



Number 



of 



dogs. 



Dura- 

 tion of 

 test. 



KUled 



or 



repelled. 



1 



Per cent. 

 16.16 



7.32 



5.00 



4.15 



2.17 





Confined in painted 



box. 

 Confined in sprayed 



box. 

 Wrapped in sprayed 



blanket. 

 ... .do 



1 

 2 

 2 

 1 



Hours. 

 1 



i 

 2 



Per cent. 

 100 



2 





100 



3 



Creosote oils and carbon 

 disulphid. 



Benzol, naphthalene, nico- 

 tine, water. 



100 



4 . 



100 





. . .do 



2 



100 











