• Title, Summary, Keyword: Permethrin

Search Result 40, Processing Time 0.047 seconds

Effect of Permethrin on Embryonic Developments in Rats (랫드에 미치는 Permethrin의 발생독성에 관한 연구)

  • Yoon, Hyo-Jung;Chung, Moon-Ho
    • Journal of Environmental Health Sciences
    • /
    • v.31 no.4
    • /
    • pp.254-259
    • /
    • 2005
  • Permethrin, a synthetic pyrethroid insecticide, has been widely used to protect domestic animals and the public health, as well as in agriculture against a variety of pests, which provides potential for environmental exposure. Permethrin is classified as possible human carcinogen and endocrine disrupting chemical by many international authorities. However, its developmental effects have been rarely studied. This study investigated the effects of permethrin during embryo-genesis. Developmental toxicity of permethrin was evaluated using short-term in vitro battery system. Gestation day 9.5 rat embryos (organogenesis) were cultured with permethrin (0.1,0.4 and 0.8 mg/ml) for 48 hours using whole embryo culture system. All the treatments exhibited significant decreases in the total morphological score. Permethrin induced significant growth retardation and the developmental abnormality at doses of 0.4 and 0.8 mg/ml. Moreover, the DNA and protein contents of embryos decreased in dose-dependent manner. These observations suggest that permethrin contributes to toxicity on embryonic developments in rats.

Adsorption and Leaching of cis and frans-Permethrin in the Soil (토양 중 cis 및 trans-Permethrin의 흡착 및 침출)

  • Sam Edward Feagley
    • Journal of Environmental Science International
    • /
    • v.4 no.4
    • /
    • pp.379-386
    • /
    • 1995
  • Permethrin [3-phenox yben zyl(1RS)-cis,tans-3-(2,2-dichloroviny1)-2,2- dimethylcyclopropane carboxylate] insecticides were selected to study adsorption and leaching potentials related to pollution on Commerce silty clay loam soil near Baton Rouge, Louisiana, USA. GLC-ECD chromatogram of permethrin included 32.5 % of cis-pemehin and 67.4 % of trans-permethrin. Extraction efficiencies of is and trmu-pemetun were 92.5 % and 92.3 % in fortified water, respectively and 85.9 % and 88.8 % in fortified soil, respectively. At a 1:10 moi]/water ratio,the Koc values for sis and fan isomers of permethrin were 938 and 877, respectively. Leaching of permethrin was evaluated in soil columns$(5.4 cm i.d. \times 26 cm length)$. Total recoveries of the permethrin applied to the soil column were $84.5\pm3.1%$. When the soil columns were leached with three pore volumes of water, the distributions of cis-permethrin leached were 6.10 % and 0.07 % of amount applied in the untreated zone soil and leachate water, respectively Trans-pemethrin distributions were 5.20 % in the untreated zone soil and 0.05 % in leachate water. Cis and trans-pemethrin was strongly adsorbed to soil. The results of the study showed the strong relationship between adsorption and leaching. Cis and trans-permethrin to be leached into the groundwater in soils with shallow aquifers were suggested a low leaching potential.

  • PDF

Sorption Isotherms and KocS Estimation of Pyrethroids in Sediments

  • Lee, Sang-Jin;Shin, Hyun-Moo
    • Journal of Environmental Science International
    • /
    • v.12 no.11
    • /
    • pp.1173-1179
    • /
    • 2003
  • Laboratory sorption isotherm batch studies have been attempted to elucidate interaction of synthetic pyrethroids (bifenthrin and permethrin) with sediments and their fractions. As a nonlinear isothermal model, the Freundlich equation was applied to sorption results obtained from sediments to investigate the relationship between synthetic pyrethroids and sediments containing different amounts of organic carbon. Results demonstrated that the sorption capabilities of bifenthrin and cis- and trans-permethrin was in the order of bifenthrin, cis-permethrin and trans-permethrin, respectively, indicating that adsorbed bifenthrin was the most stable followed by cis- and trans-permethrin in all sediments. Their sorption capability was closely related to organic carbon contents in sediments. Higher sorption was observed in sediments containing higher organic carbon contents. Sorption study extended into the fractions, clay and humic acids, extracted from a sediment, indicated that higher sorption capacity in humic acids occurred than in the clay of both examined bifenthrin and permethrin. This study demonstrates the sorption of synthetic pyrethroids with sediments, and will help in the understanding of the transport and fate of synthetic pyrethroids existing in field sediments.

Successful Treatment with Permethrin for Fur Mite Infestation in Pet Rabbits: Case Report (애완 토끼에서 털응애 감염증에 대한 Permethrin의 성공적 치료: 증례 보고)

  • Kim, Sang-Hun;Jun, Hyung-Kyou;Park, Bae-Keun;You, Myung-Jo;Kim, Duck-Hwan
    • Journal of Veterinary Clinics
    • /
    • v.25 no.2
    • /
    • pp.112-114
    • /
    • 2008
  • The fur mite is a highly contagious zoonotic mite that causes skin disorders in rabbits. In this case report, four rabbits with a fur mite infestation were treated with a single dermal application of permethrin (65%) at a dose of 0.1 ml. All the rabbits were treated successfully with permethrin without any adverse reactions at 8 weeks after treatment. This suggests that permethrin is an effective treatment for fur mite infestations in rabbits.

Resistance Development and Cross-Resistance of Chlorpyrifod, dichorovs and Permethrin-Selected House Fly (Musca domestica L.) (집파리에 대한 Chlorpyrifos, Dichlovos 및 Permethrin의 저항성 유발과 교차저항성)

  • 이용규;김정화;이형래
    • Korean journal of applied entomology
    • /
    • v.33 no.3
    • /
    • pp.166-172
    • /
    • 1994
  • This study was conducted to investigate the resistance development and cross-res~stance of house fly (Musco dornestica L.) selected with chlorpyrifos, dichlorvos and permethrin for 11 generations to various p u p s of insectiodes. The resistance ratio (RR) of the chlorpyrifos-selected (Q), the d~chlorvos- selected (&) a d the permethrin-selected (R,) stmlns were 42 0. 38 and 187 tlrnes in female. and 42.0, 4 1 and 16.4 time; in male from the susceptible strain, respectively. The Rc strain showed highest cross-resistance to permethlin among the insectic~des tested: RR=7.5 and 9.6 tunes in female and male, respectively, whereas negatively correlated cross-resistance to propoxur was observed. High cross-res~atance to chlorpyrifos were produced for female (RR= 13.3) and male (RR=15.9) of Rd strain, and female (RR=8.7) and male (RR= 9 7) of R, strain. respectively

  • PDF

Use of a Combination Imidacloprid and Permethrin for Psoroptic Mite Infestation in Three Pet Rabbits (세 마리 애완 토끼의 귀진드기 감염증에 imidacloprid와 permethrin 합제의 이용)

  • Kim, Sang-Hun;Choi, Kyeong-Ha;Kim, Duck-Hwan
    • Journal of Veterinary Clinics
    • /
    • v.26 no.6
    • /
    • pp.622-624
    • /
    • 2009
  • Psoroptic mites can cause severe pruritic otitis externa with crusts in rabbits. In this case report, three rabbits with a psoroptic mite infestation were treated with a formulation containing 10% imidacloprid and 50% permethrin at a dose of 0.4 ml regardless of body weight. One week after treatment, the rabbits showed mild pruritus with no crusts, mites or eggs. Four weeks after treatment, there were no clinical signs, mites or eggs observed in the rabbits. The rabbits were treated successfully with this combination without adverse reactions for 8 weeks after treatment. This case report suggests that a single topical application of a combination of imidacloprid and permethrin may be an effective and practical treatment for psoroptic mite infestations in pet rabbits.

Studies on the Insecticide Resistance of the German Cockroach (Blattella germanica L.) II. Resistant Developments and Cross resistance (바퀴(Blattella germanica L.)의 살충제 저항성에 관한 연구. 2. 저항성 발현 및 교차저항성)

  • 방종렬;이형래;김정화
    • Korean journal of applied entomology
    • /
    • v.32 no.2
    • /
    • pp.129-133
    • /
    • 1993
  • The German cockroach (Blattella germanical L.) populations were successively selected with chlorpyrifos and permethrin for xis generations. The resulting resistant strains, $R_{chlorpyrifos}$(Rc) and $R_{permethrin}$(Rp) were observed resistant development and the cross-resistance. The result indicated that the values of $LC_{50}$ were increased 3.32 and 2.10 times from the susceptible strain, respectively. In the Rc strains, the values of the $LC_{50}$ of fenvalerate, propoxur, permethrin were to 3.89, 2.97, and 1.31 times higher than that of the suseptible, respectively. In the Rp strains, the values of the $LC_{50}$ of fenvalerate, chlorpyrifos, and propoxur showed 5.23, 1.42, and 1.80 times cross-resistance.

  • PDF

ALTERATIONS IN SEX STEROID RECEPTOR LEVELS AND HOXA-10 EXPRESSIONS OF THE UTERI FOLLOWING NEONATAL EXPOSURE TO PERMETHRIN IN FEMALE MICE

  • Kim, Byung-Ho;Kim, Soon-Sun;Rhee, Gyu-Seek;Sohn, Kyung-Hee;Kwack, Seung-Jun;Kim, So-Hee;Lee, Rhee-Da;Lee, Hyun-Joo;Park, Sung-Soo
    • Proceedings of the Korean Society of Toxicology Conference
    • /
    • /
    • pp.167-167
    • /
    • 2002
  • Many pesticides possess hormonal activity and have been thus classified as endocrine disruptors. Permethrin, a pyrethroid insecticide has little been characterized to it's hormonal potential. In the present study, effects of neonatal exposure to permethrin on the sex steroid receptor levels and hoxa-10 expression of the uteri were investigated in female mice.(omitted)

  • PDF

Estrogenic Activity, and Developmental Toxicity Studies of Pyrethroid Insecticides

  • Kim, Soon-Sun;Rhee, Gyu-Seek;Lee, Rhee-Da;Kwack, Seung-Jun;Lim, Kwon-Jo;Yhun, Hyo-Jung;Park, Kui-Lea
    • Proceedings of the Korea Society of Environmental Toocicology Conference
    • /
    • /
    • pp.57-69
    • /
    • 2003
  • It is well known that many pesticides possess hormonal activity, and affect the developments of wildlife and mammals including human. Currently, pyrethroid insecticides are in worldwide use to control in and outdoor pests, providing potential far environmental exposure. Hormonal activities of these pyrethroid insecticides, however, have been little studied, and the developmental effects of them were no reported. Therefore, we firstly examined the potential estrogenic activities of some pyrethroid insecticides (permethrin, cypermethrin, tetramethrin, deltamethrin, sumithrin, fenvalerate and bioallethrin) by immature rat uterotrophic assay, luciferase reporter gene assay and Calbindin-D$\sub$9k/ (CaBP-9k) gene expression assay. Uterine wet weights were increased by permethrin and the permethrin-induced weights were inhibited by ICI 182780 in the uterolrophic assay. On the other hand tetramethrin significantly reduced uterine and vaginal wet weights, and also inhibited the E2-induced weight increases at all doses tested. Cypermethrin and sumithrin had a tendency to increase uterine weights, although not statistically significant. Permethrin and cypermethrin dose-dependently increased the luciferase activity in reporter gene assay. Northern blot analysis showed that permethrin induced CaBP-9k mRNA expression whereas tetramethrin inhibted. Subsequent studies were conducted to investigate the possible developmental effects of four pyrethroid insecricides (permethrin, cypermethrin, sumithrin and teramethrin). Either diethlbestrol (DES) or 17${\beta}$ -estradiol (E2) was used as a reference control in this study. Pyrethroid insecticides were administered to Sprague Dawley rats via subcutaneous injection at 6 to 18 days of gestation or 1 to 5 days after birth. In utero treatment of permethrin (10mg/kg/day) in female rat resulted in significant increases in uterine and ovarian weights while significant decreases in serum E2 concentration, uterine and ovarian ER${\alpha}$ mRNA levels. Sumithrin and permethrin led to acceleration in vaginal opening of female rat, while delay in preputial separation of male after neonatal treatment. Anogenital distances of PND 18 were significantly reduced in sumthrin-treated, and permerhrin-treated male rats after neonatal treatment. All the pyrethroid insecticides tested caused significant increases in uterine weights on PND 18, while significant reductions in the first diestrus phase when neonataly treated. In addition, exposure to pyrethroids in neonatal period led to significant reduction in relative brain weight in female rat on PND 18, but its weight was recovered in diestrus phase. In summary, Our experimental data demonstrate the possibilities of developmental effects of pyrethroid insecticides via estrogenic or antiestrogenic activity.

  • PDF

Enzyme Activities of a Honeybee(Apis mellifera L.) Associated with the Degradation of Some Insecticides (서양종(西洋種)꿀벌의 살충제분해효소에 관(關)한 연구(硏究))

  • Suh, Yong-Tack;Shim, Jae-Han
    • Applied Biological Chemistry
    • /
    • v.31 no.3
    • /
    • pp.241-248
    • /
    • 1988
  • In order to determine the approptiate usage of insecticides to honeybee(Apis mellifera L.), median effective dose to seven insecticides were studied. $LC_(50)$ value of DDT was the highest as being 58 ppm, and that of EPN was the lowest as being 1.61ppm. Various detoxifying enzymes from the midget cf adult worker bee, including microsomal oxidases, glutathione Stransferases, esterases, and DDT-dehydrochlorinase were assayed. Effects of various insecticides on microsomal enzyme activities were as follows: Aldrin epoxidase activity was inhibited by malathione and permethrin treatment. N-demethylase activity was induced by diazinon and EPN treatment and O-demethlase activity was induced by diazinon treatment. Of the glutathione S-transferases, aryltransferase(DCNB conjugation) activity was significantly induced by diazinon, and moderately induced by permethrin. Of the esterases, ${\alpha}-NA$ esterase activity was moderately inhibited by malatjione and permethrin. Acetylcholinesterase activity was not affected by the sublethal exposure of honeybee to the insecticides. Sublethal exposure of honeybee to the insecticides had no effect on DDT-dehydrochlorinase activity, except carbaryl and permethrin were significantly induced.

  • PDF