Lethal and sublethal effects of matrine (Rui agro®) on the tomato leaf miner, Tuta absoluta and the predatory bug Macrolophus pygmaeus

Articles in Press

Document Type : Research Paper

Authors

Department of Plant Protection, Faculty of Agriculture, Urmia University, Urmia, Iran.

Abstract

Tuta absoluta is a serious pest of Solanaceae plants causing economic damage worldwide and notably owing to its resistance to many commonly used insecticides. Thus the development of integrated pest management (IPM) approaches being effective against this pest. This study evaluated the toxicity of matrine insecticide against different biological stages of T. absoluta. Analysis revealed egg as the most resistant biological stage with LC50 value 1064.32 mg/L. However, the sublethal concentration (LC25) effect of matrine on T. absoluta population growth parameters was estimated using age-stage, two-sex life table theory method. The sublethal concentration (LC25= 838.25 mg/L) of matrine reduced different biological stages longevity and female fecundity in comparison to control treatment (distilled water). Values of population growth parameters: the intrinsic rate of increase (r), net reproductive rate (R0), finite rate of increase (λ) and gross reproductive rate (GRR) with LC25 of matrine were significantly lower than the control. The selectivity ratio (SR) value indicated that matrine are selective and safe for predator Macrolophus pygmaeus. Following the completion further studies and field experiments, simultaneously use of M. pygmaeus with matrine can be recommended in T. absoluta integrated management programs.

Keywords

Journal of Applied Research in Plant Protection

Articles in Press, Accepted Manuscript
Available Online from 12 January 2025

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History

  • Receive Date: 16 June 2024
  • Revise Date: 07 October 2024
  • Accept Date: 07 October 2024

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