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On synergistic co-infection in crop diseases. The case of the Maize Lethal Necrosis Disease

Abstract : Crops are often subject to intense attacks by pests and diseases. Among them, Maize Lethal Necrosis (MLN) is a serious disease that impact maize crops in many Southern countries. It results from the synergistic interaction of two plant viruses, transmitted by two vectors. In this paper, we develop a general deterministic epidemic model of crop-vector-borne disease for synergistic co-infection, with a particular focus on MLN disease. A theoretical analysis shows that different thresholds exists that drive the dynamics of the system: the well known basic reproduction numbers and also invasion reproduction numbers. The latter are essential for the emergence or not of the MLN disease. After a global sensitivity analysis, we illustrate our results through numerical simulations and discuss potential control methods such as vector control and roguing.
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https://hal.inrae.fr/hal-02964242
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Submitted on : Monday, October 12, 2020 - 11:54:34 AM
Last modification on : Thursday, February 18, 2021 - 3:32:44 AM

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Michael Chapwanya, Americo Matusse, Yves Dumont. On synergistic co-infection in crop diseases. The case of the Maize Lethal Necrosis Disease. Applied Mathematical Modelling, Elsevier, 2021, 90, pp.912-942. ⟨10.1016/j.apm.2020.09.036⟩. ⟨hal-02964242⟩

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