How to start the simulation?

First of all, you need to set up the whole system, both the landscape and initial population with all the parameters and initial values of state variables. To do that, press the button:

Every time you press setup, a new set of parameters from designated distributions will be drawn. Now when all is set up, you can start the simulation by pressing the button:

In case you want to stop the simulation before it ends, press on the same button again. If you want to just continue with the same parameter set, again press the GO button. You can monitor which day in which year your model population is through:

Day in year corresponds to Julian days, and every year had 365 d.

What can you do with the model?

You can choose to have a univoltine or bivoltine population, i.e. to have 1 or 2 reproductive cycles per year. By choosing ON on the you choose a bivoltine population:

You can have mobile individuals, by choosing ON on the

If you want some individuals to drift, i.e. to experience longer distance dispersal, chose a fraction on this slider
(if Drift is 0.00, no individuals will drift).

Pesticide applications

If you want to “apply” the pesticide, chose ON on the Then you can choose a year in which you want the pesticides applied with this slider:

Remember that the counting of years starts with 0, so if you choose year 3, that will actually be the 4th year of the simulation. In case you want to have applications in sequential years, it is best to stop the simulation (by pressing GO) in the end of the year, move the slider to e.g. 4, and press GO again. Now the model will expose the individuals again.


Finally, you can choose one of 4 exposure scenarios on

If you click on the red arrow, a menu with all the scenarios will open. You choose one by clicking on it. More information on what the scenarios represent can be found in the Model description.

For further questions, comments and feedback, please use the contact form.

Have fun!