My research focusses on how interactions between parasites, competition and facilitation, impacts parasite life-history trait evolution including traits such as virulence and transmission. I do selection experiments with different species of spider mites (Tetranychus urticae and T. evansi) and Tomato spotted wilt virus to see how traits change when evolving or coevolving with another parasite species. Another approach I use is inbred lines of T. urticae to look at genetic relationships between parasite traits (virulence and transmission). Recently I have also been looking at how the scale of competition and type of dispersal impacts the evolution of sex allocation, sexual conflict and virulence in spider mites.