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almost completely free from the mites and began to put on new feathers. 
The second application completely rid the birds of -the pest.—Granovsky 
(187). 
SarcopteB scablel (Deg.) 
Against human scabies DDT is surprisingly inefficient. A saturated 
solution in oil, or an emulsion in water applied to the skin, kills less 
than 50 percent of the Sarcoptes in 24 hours, whereas benzyl benxoate 
emulsion or sulfur ointment will kill well over 99 percent. DDT is cer- 
tainly not to be reoammended for the treatment of scabies .--Buxton ( 100) • 
SaroopteB suis Gerlaoh 
DDT in aqueous suspension did not control sarcoptio mange on pigs. 
—Shu 11 et al. (315 ) . 
Notoedres muris (Megnin), notoedric mange on rats 
A 1-peroent solution of DDT in liquid paraffin or olive oil had 
very little effeot. A 2-peroent solution led to the death of some of 
the experimental rats after the development of marked hyperaesthesia 
and frequent clonio muscular spasms.— Taylor (343, 544 ) . 
Tetranyohidae 
Paratetranyohu3 oitri (McG.), the citrus red mite 
DDT apparently is not toxic to this mite at the dosages required 
for codling moth control.— Baker and Porter (81). 
In all orchards in which DDT was used there was an inorease in the 
citrus red mite population, and in an orchard in Buena Park, Calif., the 
citrus aphid3, as well as the oitrus red mites, became serious pests, 
whereas neither were of any commercial importance in plots where oil 
only was used. "Where DDT was used with kerosene, or as an aqueous sus- 
pension of powdered solids, or in dust form there was a greater increase 
in the mite population than where it was used in regular spray oil.— 
Ebeling (142). 
Paratetranyohus pilosus (C. and F.), the European red mite 
Destructive increases in mite population at Vinoennes, Ind., did 
not ooour in plots in whioh low dosages of DDT (4 ounces per 100 gallons) 
were used, but they did oocur in most plots in whioh higher ones were 
used. At the dosages required for oodling moth control, DDT seems not 
to be toxic to this species. The use of DDT has in several cases caused 
an inorease in mite population, apparently by eliminating or reduoing 
the numbers of natural enemies of mites.— Baker and Porter (81). 
