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Copyright of Agrociencia is the property of Colegio de Postgraduados and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Agrociencia is the property of Colegio de Postgraduados and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Diaphorina citri Kuwayama es el vector reconocido de la enfermedad "Huanglongbing" (HLB). Los insecticidas son la base para su manejo dentro de áreas regionales de control (ARCO). El incremento de la presión de selección sobre poblaciones de campo es ahora un riesgo potencial para el desarrollo de resistencia a insecticidas en el vector y para la diseminación del HLB. En este estudio se determinó la susceptibilidad de D. citri a cuatro insecticidas, en tres ARCO de la costa del Golfo de México: Álamo, Cuitláhuac y Martínez de la Torre, estado de Veracruz; y dos en la costa del Pacífico: una en Tecomán, estado de Colima y una en Buenavista, estado de Michoacán. Los resultados indican niveles de resistencia variables entre insecticidas y ARCO. Las poblaciones de Tecomán (PR50 = 12) y Martínez de la Torre (PR50 = 11.5) mostraron niveles similares de resistencia a cipermetrina, aunque pertenecieran a diferentes regiones; una situación parecida ocurrió con las poblaciones de Álamo y Buenavista en relación a clorpirifos y dimetoato. Sin embargo, las poblaciones de Tecomán resultaron susceptibles a clorpirifos (PR50 = 1.85) y dimetoato (PR50 = 1), las de Buenavista (PR50 = 2.72) y Álamo (PR 50 = 1) a cipermetrina. Todas las poblaciones resultaron susceptibles a imidacloprid. El manejo de D. citri es factible con base en grupos toxicológicos. Por ejemplo, rotación de imidacloprid seguido de cipermetrina, suspendiendo el uso de insecticidas organofosforados y carbamatos, además de incorporar insecticidas de menor impacto biológico y ambiental, podría disminuir la tendencia de D. citri a desarrollar resistencia en las ARCO. Diaphorina citri Kuwayama is the recognized vector of the disease "Huanglongbing" (HLB). Insecticides are the basis for its management within the regional control areas (RCA) in Mexico. The increase in the selection pressure on field populations of D. citri is now a potential risk for the development of resistance to insecticides. In this study, susceptibility of D. citri to four insecticides was evaluated at three RCA from the Gulf of Mexico (Alamo, Cuitlahuac, and Martinez de la Torre, Veracruz), and two on the Pacific coast (Tecoman, Colima, and Buenavista, Michoacan). Results indicate variable levels of insecticide resistance among RCAs. Tecoman (PR50 = 12) and Martinez de la Torre (PR50 = 11.5) populations showed similar cypermethrin resistant levels, although they belong to different regions; a similar situation occurred with populations from Alamo and Buenavista to chlorpyrifos and dimethoate. However, the Tecoman populations were susceptible to chlorpyrifos (1.85X) and dimethoate (1.0X), and those from Buenavista (2.72X) and Alamo (1.0X) to cypermethrin. All populations were susceptible to imidacloprid. Management of D. citri is feasible based on rotation of toxicological groups. Rotation of insecticide could include imidacloprid followed by cypermethrin, while curtailing the use of organophosphorus and carbamate, to include products with reduced biological and environmental impact within RCAs. [ABSTRACT FROM AUTHOR]