We derive a mean - field description
that accurately captures the salient features of the model , most notably a phase transition between annual and biennial outbreaks .
We derive a mean - field description that accurately captures the salient features of the model , most notably a phase transition between annual and biennial outbreaks .
We derive a mean - field description that accurately captures the salient features of the model , most notably a phase transition between annual and biennial outbreaks .