Invertebrate pest of summer grain crops are often highly mobile and able to feed on numerous crops. These features make pest control challenging. In a National GRDC project we investigated grain pests and beneficials in crop and non-crop habitat in several landscapes in Darling Downs, QLD, southern NSW (Bethugra and Cootamundra), and southern WA (Albany). Focusing on Rutherglen Bug (RGB), we show the seasonal dynamic of RGB population across landscapes. Weedy pasture allows RGB population build-up, which then move into crops. Native plants rarely support RGB, nor do pasture in good condition. Using these results, we generated spatial models to explore the outcomes of management options on RGB populations. These scenarios include differing intensity and spatial extent of broad-leaf weed management in pasture and road-sides, and differing amount of RGB susceptible crops. From each of these management options, we show the outcomes and discuss the implications for broad-scale RGB suppression.