A Forecasting Model of Wheat Yellow Rust

Yellow rust is a major disease of wheat in Iran. Airborne spores of the fungal pathogen are the primary source of contamination. Temperature, humidity, intensity and direction of wind, cultivars response to disease, existence of volunteer wheat in summer, planting time and level of nutrition, are main factors which affect the disease epidemic. In forecasting model based on the disease tracing and its severity in a particular year, some effective agents such as climatic factors, cultivars response and plant growth stage, are determining the numbers of fungicide application. In this review, the importance of disease in the world and Iran as well, disease symptoms, causal agent, effective factors in disease spread, forecasting model and its executive steps and also the suitable fungicides for disease control have been described.