Sublethal effects of indoxacarb and beta-cypermethrin on Rhopalosiphum padi (Hemiptera: Aphididae) under laboratory conditions

Authors

  • Yayun Zuo Key Laboratory of Crop Pest Integrated Pest Management on the Loess Plateau of Ministry of Agriculture, College of Plant Protection, Northwest A&F University, 3 Taicheng Road, Yangling District, Shaanxi Province 712100, China
  • Kang Wang Key Laboratory of Crop Pest Integrated Pest Management on the Loess Plateau of Ministry of Agriculture, College of Plant Protection, Northwest A&F University, 3 Taicheng Road, Yangling District, Shaanxi Province 712100, China
  • Fangfei Lin Key Laboratory of Crop Pest Integrated Pest Management on the Loess Plateau of Ministry of Agriculture, College of Plant Protection, Northwest A&F University, 3 Taicheng Road, Yangling District, Shaanxi Province 712100, China
  • Yuting Li Key Laboratory of Crop Pest Integrated Pest Management on the Loess Plateau of Ministry of Agriculture, College of Plant Protection, Northwest A&F University, 3 Taicheng Road, Yangling District, Shaanxi Province 712100, China
  • Xiong Peng Key Laboratory of Crop Pest Integrated Pest Management on the Loess Plateau of Ministry of Agriculture, College of Plant Protection, Northwest A&F University, 3 Taicheng Road, Yangling District, Shaanxi Province 712100, China
  • Jaime C. Piñero Lincoln University, Cooperative Research & Extension, 900 Chestnut St, Jefferson City, Missouri 65101, USA
  • Maohua Chen Key Laboratory of Crop Pest Integrated Pest Management on the Loess Plateau of Ministry of Agriculture, College of Plant Protection, Northwest A&F University, 3 Taicheng Road, Yangling District, Shaanxi Province 712100, China

Keywords:

bird cherry-oat aphid, pyrethroid, toxicity, life table parameter

Abstract

Rhopalosiphum padi (L.) (Hemiptera: Aphididae) is a devastating pest of wheat worldwide. Beta-cypermethrin is widely used to control piercingsucking pest insects, including R. padi. Field-applied insecticides gradually descend to sublethal concentrations with the passage of time. Sublethal concentrations of insecticide may affect physiology and behavior of pests, potentially leading to pest resurgence. This study investigated potential sublethal effects of beta-cypermethrin and indoxacarb on an experimental population of R. padi. Indoxacarb is a relatively new pesticide with a mechanism of action that is different from that of beta-cypermethrin. The leaf dip method was used to test the acute toxicity of these insecticides to adult aphids, and life tables were constructed to analyze the effects of 2 sublethal concentrations of beta-cypermethrin (B-LC10, B-LC30) and indoxacarb (I-LC10, I-LC30) on the development and reproduction of the F0 and F1 generations of R. padi. Results of these analyses showed that sublethal concentrations of the 2 insecticides can significantly reduce the fecundity and longevity of the F0 generation. Also, sublethal concentrations of both insecticides prolonged the development of nymphs in the subsequent generation. Life table parameters demonstrated that the evaluated insecticides at sublethal concentrations did not stimulate aphid reproductive potential. This information could be important to enable a more effective use of these insecticides in management programs for R. padi.

 

Resumen

Rhopalosiphum padi (L.) (Hemiptera: Aphididae) es una plaga devastadora de trigo en todo el mundo. Beta-cipermetrina es ampliamente utilizado para controlar plagas de insectos chupadores, incluyendo R. padi. Los insecticidas aplicados en el campo descienden gradualmente a concentraciones subletales con el paso del tiempo. Las concentraciones subletales de insecticidas pueden afectar a la fisiología y el comportamiento de las plagas, que puede resultar en el resurgimiento de dichas plagas. Este estudio investigó los posibles efectos subletales de beta-cipermetrina y indoxacarb en una población experimental de R. padi. Indoxacarb es relativamente un nuevo pesticida con un mecanismo de acción que es diferente de la de los betacipermetrina. Se utilizó el método de inmersión foliar para probar la toxicidad aguda de estos insecticidas a los áfidos adultos, y las tablas de vida se construyeron para analizar los efectos de las 2 concentraciones subletales de beta-cipermetrina (B-LC10, B-LC30) y indoxacarb (I-LC10 , I-LC30) sobre el desarrollo y la reproducción de los F0 y F1 generaciones de R. padi. Los resultados de estos análisis mostraron que las concentraciones subletales de los 2 insecticidas pueden reducir significativamente la fecundidad y la longevidad de la generación F0. Además, concentraciones subletales de los dos insecticidas prolongan el desarrollo de las ninfas en la generación siguiente. Los parámetros de vida demostraron que los insecticidas evaluados en concentraciones subletales no estimularon la capacidad de reproducción de áfidos. Esta información podría ser importante para permitir un uso más eficaz de estos insecticidas en los programas de manejo de R. padi.

 

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Author Biographies

Yayun Zuo, Key Laboratory of Crop Pest Integrated Pest Management on the Loess Plateau of Ministry of Agriculture, College of Plant Protection, Northwest A&F University, 3 Taicheng Road, Yangling District, Shaanxi Province 712100, China

Yayun Zuo, Kang Wang, and Fangfei Lin contributed equally to this work.

Kang Wang, Key Laboratory of Crop Pest Integrated Pest Management on the Loess Plateau of Ministry of Agriculture, College of Plant Protection, Northwest A&F University, 3 Taicheng Road, Yangling District, Shaanxi Province 712100, China

Yayun Zuo, Kang Wang, and Fangfei Lin contributed equally to this work.

Fangfei Lin, Key Laboratory of Crop Pest Integrated Pest Management on the Loess Plateau of Ministry of Agriculture, College of Plant Protection, Northwest A&F University, 3 Taicheng Road, Yangling District, Shaanxi Province 712100, China

Yayun Zuo, Kang Wang, and Fangfei Lin contributed equally to this work.

Jaime C. Piñero, Lincoln University, Cooperative Research & Extension, 900 Chestnut St, Jefferson City, Missouri 65101, USA

Lincoln University

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Published

2016-06-07

Issue

Vol. 99, No. 3 (September 2016)

Section

Research Papers

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