| 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 |
| β1 | infection ratio between infected hosts and susceptible vectors | 0.01 - 0.02 |
| βP | biting rate of an infected vector on the susceptible host plants | 0.01 - 0.02 |
| βS | 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 |