Your browser doesn't support javascript.
loading
High-dose strategies for managing phosphine-resistant populations of Rhyzopertha dominica (F.) (Coleoptera: Bostrichidae).
Afful, Edwin; Tadesse, Tesfaye M; Nayak, Manoj K; Phillips, Thomas W.
Afiliação
  • Afful E; Department of Entomology, Kansas State University, Manhattan, KS, USA.
  • Tadesse TM; Department of Plant Science, Bahir Dar University, Bahir Dar, Ethiopia.
  • Nayak MK; Department of Agriculture and Fisheries, Queensland Ecosciences Precinct, Brisbane, Australia.
  • Phillips TW; Plant Biosecurity Cooperative Research Centre, GPO Box 5012, Bruce, ACT 2617, Australia.
Pest Manag Sci ; 76(5): 1683-1690, 2020 May.
Article em En | MEDLINE | ID: mdl-31749328
BACKGROUND: Rhyzopertha dominica is a serious pest of stored grains and many populations have resistance to the fumigant phosphine. Some populations contain beetles with a 'strong resistance' phenotype. Recent work found the LC50 values for two strong-resistant populations recently studied in North America, Belle Glade and Minneapolis were 100- and 595-fold higher, respectively, compared to LC50 of a lab-susceptible strain. Populations with 'weak-resistant' phenotypes had LC50 values 5- to 10-fold that of a susceptible strain. The work reported below aimed to determine the minimum phosphine concentrations and number of days of exposure needed to effectively control all life stages of representative weak- and strong-resistant strains, and then to recommend the treatment conditions needed to control strongly phosphine-resistant R. dominica in pest populations. RESULTS: A dose-mortality assay estimated that phosphine fumigation over 48 h using 730-870 ppm at 25° C would control adults of both strongly resistant R. dominica populations. Fumigations with mixed life stage cultures found 200 ppm killed all susceptible and weak-resistant beetles in 2 days, but the strong-resistant Minneapolis and Belle Glade strains had substantial survivors at 200 ppm. Furthermore, the Belle Glade strain had beetles that survived 1000 ppm in 2-day fumigations. The strong-resistant Belle Glade strain needed nearly 10 days at over 400 ppm to have acceptable levels of control. CONCLUSION: This study recommends protocols to manage strongly resistant R. dominica populations provided that a minimum phosphine concentration of 400 ppm be maintained at 25° C or higher for up to 10 days. © 2019 Society of Chemical Industry.
Assuntos
Palavras-chave
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Besouros Tipo de estudo: Guideline Limite: Animals País/Região como assunto: America do norte / Caribe / Caribe ingles / Dominica Idioma: En Revista: Pest Manag Sci Assunto da revista: TOXICOLOGIA Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Estados Unidos País de publicação: Reino Unido
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Besouros Tipo de estudo: Guideline Limite: Animals País/Região como assunto: America do norte / Caribe / Caribe ingles / Dominica Idioma: En Revista: Pest Manag Sci Assunto da revista: TOXICOLOGIA Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Estados Unidos País de publicação: Reino Unido