نتایج جستجو برای: pyrethroid insecticides

تعداد نتایج: 15273  

Journal: :Genetics and molecular research : GMR 2011
R N Christian T S Matambo B L Spillings B D Brooke M Coetzee L L Koekemoer

Anopheles funestus is a major vector of malaria in most of the African region. Resistance to pyrethroid and carbamate insecticides has been recorded in populations of this species in South Africa and Mozambique. The P450 gene, CYP6P9, has been shown to be highly transcribed in a permethrin (pyrethroid)-resistant laboratory strain, FUMOZ-R, originating from southern Mozambique. We examined ...

Journal: :Insect biochemistry and molecular biology 2000
R Hernandez H He A C Chen S D Waghela G Wayne Ivie J E George G Gale Wagner

Two esterase cDNA sequences were obtained from susceptible and organophosphorus resistant strains of Boophilus microplus. Both sequences have a high degree of homology to carboxylesterase B. One gene has identical sequences in both strains and the other showed two point mutations. One mutation produces an amino acid substitution when the amino acid sequence is deduced, this mutation was detecte...

Journal: :Memorias do Instituto Oswaldo Cruz 2002
Antonio Thadeu M Barros Alberto Gomes Ana Paula K Ismael Wilson W Koller

From October 2000 to April 2001, insecticide bioassays were conducted in 18 ranches from 10 counties in the states of Mato Grosso and Mato Grosso do Sul, in Central Brazil. Horn flies from wild populations were exposed to diazinon-impregnated filter papers immediately after collection on cattle, and mortality was recorded after 2 h. A high susceptibility to diazinon was observed in all tested p...

2017
Shaiene C Moreno Flaviano O Silvério Marcelo C Picanço Elson S Alvarenga Renata R Pereira Paulo A Santana Júnior Gerson A Silva

Insect pests are responsible for major losses in crop productivity, and insecticides are the main tools used to control these organisms. There is increasing demand for new products for pest management. Therefore, the aim of this study was to assess the toxicity of pyrethroids with acid moiety modifications to measure the insecticidal activity of these compounds on Tuta absoluta (Meyrick) (Lepid...

Journal: :journal of arthropod-borne diseases 0
m shahi school of public health, hormozgan university of medical sciences, bandar abbas, iran aa hanafi-bojd department of medical entomology and vector control, school of public health, tehran university of medical sciences, tehran, iran h vatandoost department of medical entomology and vector control, school of public health, tehran university of medical sciences, tehran, iran

background: the german cockroach, blattella germanica l . , is a serious household and public health pest worldwide. con­trol of this species has been very difficult to achieve. toxicity of cypermethrin ec10%, deltamethrin ec5%, diazi­non ec0.5%, lambda-cyhalothrin ec5% and negon® (permethrin+propoxur oil liquid1%) commercial for­mula­tions were investigated against adult males of german cockro...

Journal: :Journal of medical entomology 2002
María M Rodríguez Juan Bisset Michel Ruiz Alaín Soca

A sample of Aedes aegypti (L.) from Santiago de Cuba, Cuba, with a high level of temephos resistance (19.58x at the 50% lethal concentration [LC50]), was subjected to temephos selection to evaluate the utility of this organophosphate insecticide for mosquito control. High resistance developed after six generations of selection (200.00x). Little or no cross-resistance was observed to the organop...

2015
Adriano E. Pereira Haichuan Wang Sarah N. Zukoff Lance J. Meinke B. Wade French Blair D. Siegfried Mario Soberón

Pyrethroid insecticides have been used to control larvae or adults of the western corn rootworm (WCR), Diabrotica virgifera virgifera LeConte, a key pest of field corn in the United States. In response to reports of reduced efficacy of pyrethroids in WCR management programs in southwestern areas of Nebraska and Kansas the present research was designed to establish a baseline of susceptibility t...

2016
David G. Lilly Cameron E. Webb Stephen L. Doggett

Insecticide resistance in bed bugs (Cimex lectularius and Cimex hemipterus) has become widespread, which has necessitated the development of new IPM (Integrated Pest Management) strategies and products for the eradication of infestations. Two promising options are the diatomaceous earth and silica gel-based desiccant dusts, both of which induce dehydration and eventual death upon bed bugs expos...

Journal: :Pest management science 2017
Jeffrey G Scott

Houseflies, Musca domestica L., are a significant pest because of the numerous diseases they transmit. Control of housefly populations, particularly at animal production facilities, is frequently done using pyrethroid insecticides which kill insects by prolonging the open time of the voltage-sensitive sodium channel (VSSC). Houseflies have evolved resistance to pyrethroids owing to mutations in...

Journal: :Insect biochemistry and molecular biology 2000
Z Liu S M Valles K Dong

Knockdown resistance (kdr) to pyrethroid insecticides has been attributed to point mutations in the para sodium channel gene in more than a half dozen insect pest species. In this study, we identified two novel para mutations in five highly resistant kdr-type German cockroach strains. The two mutations, from glutamic acid (E434) to lysine (K434) and from cysteine (C764) to arginine (R764), resp...

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