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Monitoring resistance of Helicoverpa armigera to different insecticides used in cotton in Spain

 

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Opened Access Monitoring resistance of Helicoverpa armigera to different insecticides used in cotton in Spain
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Author: Avilla Hernández, Carlos
González Zamora, José Enrique
Department: Universidad de Sevilla. Departamento de Ciencias Agroforestales
Date: 2010
Published in: Crop Protection, 29, 100–103
Document type: Article
Abstract: Helicoverpa armigera is the key pest of cotton in Spain, resulting in many insecticide treatments against it. The resistance status of H. armigera to different insecticides currently used in cotton was evaluated in Spain in two different seasons, 1999 and 2004. Four populations were tested in total, two in each season. Toxicological bioassays were conducted in the laboratory, and performed on third instar larvae by topical application of the insecticides. LD50's were estimated by probit analysis and resistance factors (RF) were calculated at the LD50 level. Four insecticides were evaluated, but only endosulfan reached a moderate resistance level (RF = 11.4), and the others (methomyl, chlorpyrifos and lambda-cyhalothrin) showed low resistance (RF between 1.9 and 6.0). Such results indicate the generally low resistance of H. armigera to most of the insecticides used against this pest in cotton in Spain. Possible explanations for this situation are discussed
Cite: Avilla Hernández, C. y González Zamora, J.E. (2010). Monitoring resistance of Helicoverpa armigera to different insecticides used in cotton in Spain. Crop Protection, 29, 100-103.
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art Zamora

URI: http://hdl.handle.net/11441/29397

DOI: 10.1016/j.cropro.2009.09.007

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