Myriam Djoukwe Tapi

PhD

Myriam Djoukwe Tapi
  • University of Douala, Cameroon, 2014 – 19 June 2020
  • Title: Mathematical modelling, analysis and simulations to improve the control of Miridae, a cocoa pest
  • HAL: tel-03122705
  • Supervisors: S. Bowong, Y. Dumont, L. Bagny-Beilhe (CIRAD)
  • Partners: CIRAD, IRAD

Context

  • Cocoa: major cash crop – Cameroon: 5th largest producer
  • Mirids Sahlbergella singularis
    • feed on and damage young pods and shoots,
    • most dangerous insects
  • Control methods:
    • insecticides; efficient but costly
    • cropping practices
    • mating disruption
    • trapping

Objectives

  • Represent the spatio-temporal evolution of damages caused by mirids in a cocoa plot
  • Compare (bio)control strategies to reduce the pest population and the damages
  • Set up new experiments and observations to validate hypotheses or estimate model parameters

Results

  • Mirid population stage-structured dynamic models: with periodic parameters, or time-delays
  • Model analysis: based on cooperative system theory, conditions for mirid persistence
  • Mirid control: insecticide use could be reduced if applied at the appropriate period of the year; alternative methods, i.e. mating disruption and trapping, could also reduce the pest population

M. Djoukwe Tapi, L. Bagny Beihle, S. Bowong, Y. Dumont. Models for Miridae, a cocoa insect pest. Application in control strategies. Mathematical Methods in the Applied Sciences 41(18):8673-8696, 2018. DOI: 10.1002/mma.5063

M. Djoukwe Tapi, L. Bagny Beihle, Y. Dumont. Miridae control using sex-pheromone traps. Modeling, analysis and simulations. Nonlinear Analysis: Real World Applications 54:103082, 2020. DOI: 10.1016/j.nonrwa.2019.103082

Misc

  • EPITAG visit in France
    • May-July 2017
  • Conference
    • BIOMATH 2017, Kruger Park, south Africa. Poster. HAL: hal-01860858
  • Career after PhD: lecturer, University of Douala, Cameroon, since 2020

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