Host Plant Resistance and the Spread of Plant Viruses 1

Publisher Website
Google Scholar
Abstract
Crop cuitivars resistant to insect vectors of plant viruses are likely to alter the population size, activity, and probing and feeding behavior of the vector, thereby influencing the pattern of virus spread. The effect of a vector resistant cuitivar on virus spread will depend upon the type of resistance (nonpreference, antibiosis, or tolerance), the level of resistance, the relative importance of primary and secondary virus spread, the length of the acquisition, inoculation, retention, and latent periods of the virus, and the effect of virus infection on vector resistance in the plant. Each combination of these factors may result in a different effect on virus spread; the possibilities are discussed. Because of the complexities involved, a thorough understanding of the ecology of virus spread, the biology of vector resistance, and the ecology of the vector arc essential to predict the effect of vector resistance on virus spread.