Simulations of bird cherry—Oat aphid population dynamics: A tool for developing strategies for breeding aphid-resistant plants

Abstract A model of the population dynamics of the bird cherry—oat aphid ( Rhopalosiphum padi (L.)) has been used to study the likelly effects of plant resistance on aphid population growth. The sensitivity to changes in aphid population variables (landing, wing formation, birth, mortality, development) and their timing were simulated. Based on the simulations, we suggest that resistant plant genotypes should have the following characteristics in their effects on the aphid: (i) cause high nymphal mortality, (ii) cause prolonged development during early plant stages and (iii) cause low birth rate close to ear emergence. The simulations also stress the need for further research on the damaging effects of R. padi on the plant.