Long-term foliar persistence and efficacy of spinosad against beet armyworm under greenhouse conditions.

Santís, Erika L. and Hernández, Luis A. and Martínez, Ana M. and Campos, Jesús and Figueroa, J.I. and Lobit, Philippe and Chavarrieta, Juan M. and Viñuela Sandoval, Elisa and Smagghe, Guy and Pineda, Samuel (2012). Long-term foliar persistence and efficacy of spinosad against beet armyworm under greenhouse conditions.. "Pest Management Science", v. 68 (n. 6); pp. 914-921. ISSN 1526-498X. https://doi.org/10.1002/ps.3250.

Description

Title: Long-term foliar persistence and efficacy of spinosad against beet armyworm under greenhouse conditions.
Author/s:
  • Santís, Erika L.
  • Hernández, Luis A.
  • Martínez, Ana M.
  • Campos, Jesús
  • Figueroa, J.I.
  • Lobit, Philippe
  • Chavarrieta, Juan M.
  • Viñuela Sandoval, Elisa
  • Smagghe, Guy
  • Pineda, Samuel
Item Type: Article
Título de Revista/Publicación: Pest Management Science
Date: December 2012
ISSN: 1526-498X
Volume: 68
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Producción Vegetal: Botánica y Protección Vegetal [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

BACKGROUND: The immediate lethality caused by spinosad has been widely studied on Spodoptera exigua (H ¿ ubner). However, long-term effects can also provide valuable information on insecticide toxic action. Here, the persistence of spinosad on Capsicum annuum L. foliage and the lethal and sublethal effects of greenhouse-aged foliar residues of this insecticide on third instars of S. exigua are reported. RESULTS: Foliage was collected at 0, 3, 5, 10, 20, 30, 40 and 50 days after application, and spinosad residues were measured. Residues decreased over time according to first-order kinetics. The average rate constant and half-life of disappearance were 4.44×10?3 and156 daysand5.80×10?3 and120 days for60and120 mg L?1 respectively. Larval mortalitygradually decreased, corresponding to the residues, but was still appreciable (35 and 65% for 60 and 120 mg L?1 respectively) when the larvae were fed with foliage collected 50 days after treatment. Subsequently, pupal development was reduced and varied between 20 and 60% and between 21 and 41% for 60 and 120 mg L?1, respectively, in all ages of leaf residues that were bioassayed. At all time points, the consumption rate by the larvae was reduced between 62 and 84% for both concentrations that were bioassayed. CONCLUSION: It is concluded that, under the present greenhouse conditions, the degradation of spinosad was slower than that reported by other authors in the field, and, because of that, its residues could cause lethal and sublethal effects to S. exigua larvae.

More information

Item ID: 15969
DC Identifier: http://oa.upm.es/15969/
OAI Identifier: oai:oa.upm.es:15969
DOI: 10.1002/ps.3250
Official URL: http://onlinelibrary.wiley.com/doi/10.1002/ps.3250/abstract
Deposited by: Memoria Investigacion
Deposited on: 27 Jun 2013 16:49
Last Modified: 21 Apr 2016 16:17
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