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| Montanha,F.P.; Fredianelli,A.C.; Wagner,R.; Sacco,S.R.; Rocha,D.C.C.; Pimpão,C.T.. |
| The acute intoxication of Cypermethrin in Silver Catfish (Rhamdia quelen) was evaluated. Animals weighing 56.67±4.43g and measuring 18.92±1.16cm were exposed to sublethal concentrations of Cypermethrin for the species in hydrological conditions during 96 hours. A total of 52 fish divided into three groups were used and received the following concentrations of Cypermethrin: 0 (n=12); 1.5 (n=20) and 2.5 (n=20)mg/L. The intoxicated animals suffered behavioral changes such as loss of balance, swimming alteration, dyspnea, upright swimming and sudden spiral swimming movements. As soon as the 96-hour period was over, a blood collection for hematological and biochemical analyses was performed. A complete haemogram test, plasmatic protein test, albumin, alanine... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Biomarkers; Ecotoxicology; Haemogram; Pyrethroids. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000300697 |
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| Aguirre-Obando,Oscar Alexander; Pietrobon,Anna Julia; Bona,Ana Caroline Dalla; Navarro-Silva,Mário Antônio. |
| ABSTRACT After a dengue outbreak, the knowledge on the extent, distribution and mechanisms of insecticide resistance is essential for successful insecticide-based dengue control interventions. Therefore, we evaluated the potential changes to insecticide resistance in natural Aedes aegypti populations to Organophosphates (OP) and Pyrethroids (PY) after chemical vector control interventions. After a Dengue outbreak in 2010, A. aegypti mosquitoes from the urban area of Jacarezinho (Paraná, Brazil) were collected in 2011 and 2012. Insecticide resistance to OP Temephos was assessed in 2011 and 2012 by dose–response bioassays adopting WHO-based protocols. Additionally, in both sampling, PY resistance was also investigated by the Val1016Ile mutation genotyping.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioassays; Dengue; Insecticide resistance; Knockdown resistance; Pyrethroids; Temephos. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262016000100094 |
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| Livingston, Michael J.; Storer, Nicholas P.; Van Duyn, John W.; Kennedy, George G.. |
| We examine producer behavior, resistance evolution, and returns under alternative refuge requirements in an eastern North Carolina region with multiple corn, cotton, and soybean fields infested by a mobile pest. Returns are highest, pyrethroid sprays occur least frequently, and pyrethroid resistance evolution is delayed most effectively with no refuge requirement. Complying with the current 20% refuge requirement costs the producer $8.67 per cotton acre, or $34.21 per non-transgenic insecticidal (Bt) cotton acre. Returns are highest under each refuge requirement when one-toxin Bt cotton is not phased out; however, removal of the technology at the earliest phase-out date minimizes regional pyrethroid sprays. |
| Tipo: Journal Article |
Palavras-chave: Bollworm; Bt cotton; Pyrethroids; Resistance; Structured refuge; Unstructured refuge; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies; Q16; Q56; Q57; Q58; R34; R38. |
| Ano: 2007 |
URL: http://purl.umn.edu/6619 |
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| ZANUNCIO,TERESINHA V; ZANUNCIO,JOSÉ C; SERRÃO,JOSÉ E; MEDEIROS,RÔMULO S; PINON,TOBÍAS BM; SEDIYAMA,CAMILLA AZ. |
| The stinkbug Supputius cincticeps (Stål) (Heteroptera: Pentatomidae) can be found in agricultural and forest ecosystems feeding primarily on larvae of Coleoptera and Lepidoptera, where it can be exposed to insecticide applications. This study therefore aimed to evaluate the reproductive potential of'S. cincticeps after exposition to sublethal doses of permethrin (5.74 x 10-3, 5.74 x 10-2, 5.74 x 10-1, 5.74 and 57.44 ppb) through the use of a fertility life table. The development cycle of this predator was determined in order to calculate its net reproductive rate (R0), the infinitesimal (r m) and finite (λ) rates of increase in addition to mean generation time (T). The net reproductive (18.31), infinitesimal (r m) (0.050) and finite (λ)... |
| Tipo: Journal article |
Palavras-chave: Asopinae; Biological control; Pyrethroids; Reproduction. |
| Ano: 2005 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602005000100005 |
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| Bona,Ana C. Dalla; Piccoli,Carla F.; Leandro,André de S.; Kafka,Rosinei; Twerdochilib,Adriana L.; Navarro-Silva,Mário A.. |
| The genetic variability of populations of Aedes (Stegomyia) aegypti (Linnaeus, 1762) is often low due to the intense selection pressure caused by chemical control measures. In this study, we evaluated the susceptibility of larvae and adults of this mosquito to chemical insecticides, the frequency of the Val1016IIe mutation, and the genetic variability of the mitochondrial ND4 gene fragment in the urban area of Foz do Iguaçu, Paraná. The populations of A. aegypti in the southern and central regions of the city were resistant to the diagnostic dose of temephos 0.0162 ppm. Additionally, we detected difference in susceptibility in the northern population. The resistance ratios (RR95) were 3.8, 4.1, and 4.6 for the populations in the north, central, and south... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Knockdown resistance; Mitochondrial DNA; Pyrethroids; Temephos. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000600005 |
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