We study systems
Phase space diagrams for model systems. Upper pair are population models with second order auto-regressive (AR) characteristics; left is purely deterministic model with unregulated oscillations, right is one realization of the same model with stochastic AR parameters. Lower pair correspond to the upper pair, but population now subject to control through the imposition of a threshold-based control effort.
We work on a range of important crop commodities in California, but the majority of our efforts are focused on
Citrus - particularly in relation to suppression of HLB
Wine grapes - particularly the management of vector-borne viruses
Processing tomato - particularly TSWV and BCTV
I curate my Google Scholar citation page. You can view it here
Alongside our applied research and extension work, we also work on basic and methodological aspects of epidemiology, particularly how to integrate human behaviour into epidemiological models, and the use of information theory to understand aspects of epidemic dynamics.