t,n .t r,,.r rr,.., r/,{. t,:., "ll {"t,":'", i';,,r,.,, \lrJ,(,nc.,il{.i ll:!,(ilc ',n.hthl IiiJ h\ Iht \nr('rrtJ THE EFFECTIVENESS OF PERMETHRIN AND OR IN ö'U'"OTION. FOR PROTECTION .AEDES TAENIORHYNCHUY DEET, ALONE AGAINST C E' SCHRECK't D' G' HAILE'* rNo D' t tolf:t ' rnsecrs.lrreain, ,n"^ ',,0\jl;j,'ü:::'i;:;::,:t:'ä;:!^ä";;'r:;! L'nired Sntes Depa^men'l Abstract. Fieid tests were conducted-to compare the de-gree of pl:1::tion from bites by the mosquito .t"a,, ,o,*nio,'aä1^ iy'*:T"i'i;;'i,$1,',t,ür:,;::':l':"',liitfrll;i::1 *in"ää;inn" [(3-phenoxyphenvl)metnvt .:;äJ';;;oprvi"ä deet (N,N-diethyl-rn- ljili * lj:]:f :'.nT;'ll' :11ty' ll,üilf il i'i l;;; ; "'i " d ir'itrea t ed ci o t h i n g H u m a n restsubjec,s* .... "*,.äi.-""ui,"i,l"t*::ilh::i::iti::l;*:tl;tfiFi$ ii.ti.'r e daYVtreatment) *th:lä:::r'Hi'ä; ", u .r'..t to determine the overarr subjects were also exPo biting rate or,"orqu,,i',] i-t'' l'-üi'". 1i;,li täir' pÄt*ti:" l:T*l.Ji:t'tiätl 'f i*[tätr'*l;äl{*i';gliü:$ reduced biring ratesuv töötit*ithin rhe irnmediate area wheresuoJec ,i".t"O uniforms for t hours' Personal pto"t'ion from the bites of blood- f..aitt ""ttropods has usuallv ftl i::::- ffi:ä u, ,i" "t" of chtmical repellents app.lied to skin of clothing, or ooth't Currently used re- ;;;t;r;t; effecti'"e onlY when aPPlied ',' :::i tively large quanrltles' and their use may cause p,our.-, or l.*oii:'o T;"ll'-il'L ili J"jl- offensivelY odorous' ar tics. A repellenr mixture (M- 1960) developed for i m pres'ation .' T1tg,'i""tt::;#:l?:ilf :'J accePted due to its od( "tllttä;, bv Schreck et al'''r indicated tllt tl' ": ;ü i i'i + l:: ::';1i, $"1 fi,l'ii :::i' ä; merhrin [(3-PhenoxyPn ';I ;ä;i;t;'t'envtlz' 2dimethvlcvclopropane- ä;;i;;;i offers-a highlve ffecri "'.'"::Y, :' ;;.;;;;ftsect bites because of its toxicactron' In addition, the use ol permethrin has many ad- vantages overthe u" oitonutntional repellents' As a clothing impregnant' it is long lasttng' oe- ;;.',;,ä;s *ashins and wear ana1.1 s11ul; tn ;fir..;oiro. *t-.,t;n it not sreasv't:-:::1 'oi^1,i.''.i. ;'; :' :f,'il, ff :::J::ä'il ?l protects ot i:t lT:::tir reduces the bitins pop- reoellencY; therelore' ulation in the immediate area' T:;;;;; has bcen subjected to'il:1:1"" ,.il;;il;;;rmine its toxicitv to mammals rrom tl*.t,l." "t'ttom chronic ropical andinhalatton exposure.A n.p"",.J"ppiätiont t" -tl,t-tl:.:t various mammals caused no eye-or tl11'lTt"- tion, and no skin "n'itiuitt or histologi'cal le- sions. The authors of a I 3-week study-wtth'var- ious mammats' i"ctuoing bcagle dogs' ::"-t]:o"o that inhalation of ptt--"tftrin does not present an acute to^it n"t"'ä to-t'urn"nt't In a study of 125 AccePted l3 December 1983' e results of rcsearch only' . This paper repons the resltts-11.1:::-":';;;- *."iiä. äi'" pt'tltiat docs not constitutc'a-reco1 ;:ä;ä;' r.' u se bv ll'-J,:.ä'""#äil lt"#"i ; culture. nor does it impry ttStstit:'.:': "'.:;:; " .... u.4 ää;ä i;; *r 1 1 3;iXXr:'ü l[:ffi ':::ä:l.- b" 166 l-[niversity oI rlor ;J, l'i". ;äääi of Hut"n Subjecrs' in accordance ;;, ;' ;;* J;;.' re' h v 1i" i:llX1 : i'T' l;T'l'r" l ll; 103 (b), Federal Regster' 1976. 'rh "nlr."r.t reponcd herc was conduclcd' in' ?"n Yll ."1,ä' ;;;;; ": * l* tr'#.;':;:'J.ä 1:T and DcveloPment Lomm Maryland. ,ts ro: C. E. Schreck, Inst^cts ,*l$läl,xl;l iäül i:l#.:,nr:::,t n uion, P.o.Box 14565' f Rescarch Entomologlst' f Agricultural Engincer'