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Systematic dipping in derris of all dogs in one area twice each 
week for four seasons, combined with control of meadow mioe for one 
season, was followed by almost complete absence of the American dog 
tick. — U. S. Bureau of Entomology and Plant Quarantine ( 624 , p* 47), 
Haemaphysalis leporis-palustris Pack., the rabbit tiok 
If dogs become infested with this species, treat them with 
derris-talo mixture.— Headlee (274 ) * 
Ixodes holocyolus Newnu, the bottle tick, scrub tiok 
In. Queensland it was reoommended that foals and calves should 
be sprayed every 7 days during the tiok season with the wash of derrls 
and soap used for dogs* Dust dogs with derrls powder, or wash then 
in an infusion of derris in water* The infusion is made by soaking 
1*5 to 2 ounces of derris powder in 1 gallon of water overnight or for 
about 12 hours, using sufficient soap to produce a good lather*— 
Roberts (508) * 
Ixodes ricinus (L*), the castor-bean tiok, sheep tick 
In England much loss can be prevented by dipping the entire flock 
4 to 8 days prior to lambing (this treatment will give comparative 
freedom from ticks for 3 weeks), and by the application of derris dust 
to newlyborn lambs at 2 to 3 weeks intervals, until the end of the 
spring season of tiok a otivity*— Stewart and Ponsford (671 ) ; Stewart 
(570)* 
Rhipicephalus sanguineus (Latr*), the brown dog tick 
Probably the best method of killing ticks on dogs is to apply a 
wash of 2 ounces of derris or cube powder (3 percent of rot en one) , 
1 ounce of neutral soap or soap flakes, and 1 gallon of tepid water* 
Ticks may also be killed by dusting with derris or cube powder (3 to 
6 percent of rotenone) or with fresh pyrethrum* During the war the 
use of rotenone on dogs was not permitted, but an 0*18-peroent arsenio 
trioxide dip oould be used in place of derris or pyrethrum dust for 
infested dogs*— Bishopp (55); Bishopp and Smith (67) * 
Same treatment as for Derma cent or sp*— Da Jesus and Gapur (324); 
for D* variabilis *— Harwood 1268 ) * 
Dogs that are infested should be dusted with the derris-talo 
mixture* Thorough spraying of the infested places with oil contain- 
ing pyrethrins or rotenoids should result in killing all ticks with 
which the spray comes in contact*— Headlee (274) * 
