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Assessment of Toxicity Risk of Selected Insecticides Used in Pistachio Ecosystem on Two Egg Parasitoids (Hymenoptera: Scelionidae) of Stink Bugs (Hemiptera: Pentatomidae).
Ranjbar, Fateme; Reitz, Stuart; Esmaeili Sardary, Abbas; Jalali, M Amin; Ziaaddini, Mahdi; Izadi, Hamzeh.
Afiliación
  • Ranjbar F; Pistachio Safety Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.
  • Reitz S; Department of Crop Protection, College of Agriculture, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran.
  • Esmaeili Sardary A; Department of Crop and Soil Science, Oregon State University, Ontario, OR, USA.
  • Jalali MA; Department of Crop Protection, College of Agriculture, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran.
  • Ziaaddini M; Pistachio Safety Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.
  • Izadi H; Department of Crop Protection, College of Agriculture, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran.
J Econ Entomol ; 114(4): 1588-1596, 2021 08 05.
Article en En | MEDLINE | ID: mdl-34240149
Psix saccharicola (Mani) and Trissolcus semistriatus (Nees) are the most abundant eggs parasitoids of the stink bug, Acrosternum arabicum Wagner, in pistachio orchards and have the potential to contribute to their suppression. However, treatment of orchards with broad-spectrum insecticides may greatly reduce populations of these beneficial natural enemies. Therefore, we conducted risk assessments and evaluated sublethal impacts of two insecticides routinely used in pistachio orchards: the organophosphate fenitrothion and a formulated mixture of the neonicotinoid thiamethoxam and the pyrethroid lambda-cyhalothrin on parasitism success, emergence and sex ratio of P. saccharicola and T. semistriatus. Based on the values of their risk quotients (RQ), which are derived from toxicity data, the two insecticide products would be classified as slightly-to-moderately toxic although an alternative metric, the safety factor (SF), showed them to be highly risky. Assessments of sublethal effects on adult wasps showed that insecticide exposure significantly reduced their ability to successfully parasitize stink bug eggs, and exposure of adult females reduced the emergence, survival, and proportion of females of their progeny, which could disrupt biological control for an extended period of time. Analysis of the decreased emergence and parasitism for P. saccharicola and T. semistriatus in accordance with the standards of the International Organization for Biological Control (IOBC) indicate that fenitrothion is slightly harmful to both parasitoid species whereas the mixture of thiamethoxam + lambda-cyhalothrin is moderately harmful. These findings will be useful for integrating insecticides and egg parasitoids into a comprehensive integrated pest management program for managing stink bugs populations in pistachio orchards.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Avispas / Heterópteros / Pistacia / Hemípteros / Himenópteros / Insecticidas Tipo de estudio: Etiology_studies / Guideline / Risk_factors_studies Límite: Animals Idioma: En Revista: J Econ Entomol Año: 2021 Tipo del documento: Article País de afiliación: Irán Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Avispas / Heterópteros / Pistacia / Hemípteros / Himenópteros / Insecticidas Tipo de estudio: Etiology_studies / Guideline / Risk_factors_studies Límite: Animals Idioma: En Revista: J Econ Entomol Año: 2021 Tipo del documento: Article País de afiliación: Irán Pais de publicación: Reino Unido