AN EPIDEMIC SIMULATION MODEL OF STRIPE RUST (Puccinia striiformis) ON SLOW RUSTING CULTIVARS OF WHEAT (Ⅱ)

The Slow Rusting Epidemic Simulation Model (SRESMI) was built based on the resistance com-ponent data obtained from field experiments. In the preliminary validation of the model, the simulatedepidemics basically conformed to the observed ones and the structure of the model seemed to be basicallycorrect. Among the resistance components, infection frequency, sporulation capacity and the lesion expan-sion rate played the most important role in the slow rusting epidemic, while the latent and infectiousperiods did the less and the least, respectively. This model may be useful for the exploration of slow-rusting breeding and the evaluation of the potential effectiveness of slow-rusters in practical cultivationunder different epidemic pressures.