Effects of combined thiamethoxam and diatomaceous earth on mortality and progeny production of four Pakistani populations of Rhyzopertha dominica (Coleoptera: Bostrichidae) on wheat, rice and maize

► Thiamethoxam and DE tested on wheat, rice and maize on four R. dominica populations. ► Thiamethoxam was more effective than DE even with lowest dose rates. ► Adult mortality was greater in wheat than other grains. ► Populations differed in progeny production and effect of DE and thiamethoxam.