Prof. R. Kruger is an Associate Professor at the University of Pretoria. She is particularly interested in insect pests of horticultural crops, including vectors of plant virus diseases, and insects as natural enemies (parasitoids and predators) of insect pests on plants. Further research interests are concerned with the transmission biology of plant viruses by insect vectors. Research on the complex interactions between plants, herbivorous insects and their natural enemies, and plant virus – insect vector interactions forms the basis of integrated pest and disease management programmes.