Spatial and temporal spread of Uromyces viciae-fabae causing pea rust

Intensity and spread of the pea rust disease were highly influenced by the wind direction. The disease started spreading from infection foci after two week of inoculation. A foci was set in the centre of the experimental plot. The intensity of disease spread was more towards the south western side. The minimum of 30 per cent disease was observed after 7 weeks in the whole plot during both the seasons. The maximum disease 70 per cent was located up to 2–3 meters from the focus in all the directions near the maturity of crop after 7^th week during both the seasons. The velocity of the rust spread was observed 0.83–0.89 m week⁻¹.