Parameter | Description | Default value |

S | number of the susceptible plant hosts | - |

I | number of the infected plant hosts | - |

R | number of the recovered plant hosts | - |

K | sum of the total plant hosts | 50 - 1000 |

X | density of the susceptible insect vectors | .. |

Y | density of the infected insect vectors | - |

N | sum of the total insect vectors density | 50 - 100 |

β | infection ratio between infected hosts and susceptible vectors | 0.01 - 0.02 |

β | biting rate of an infected vector on the susceptible host plants | 0.01 - 0.02 |

β | infection incidence between infected and susceptible hosts | 0.01 - 0.02 |

γ | the conversion rate of infected hosts to recovered hosts | 0 - 0.4 |

μ | natural death rate of plant hosts | 0 - 0.1 |

Λ | birth or immigration of insect vectors | 5 |

m | natural death rate of insect vectors | 0 - 0.5 |

d | disease-induced mortality of infected hosts | 0.1 |