Effects of Meteorological Factors on the Development of Coffee Leaf Rust1

The development of coffee leaf rust (Hemileia vastatrix) was studied at Pindorama, SaTo Paulo State, Brazil, on a non-sprayed coffee plantation (cv. Mundo Novo). The disease intensity, evaluated by the proportion of rusted leaves, was lower during January and increased to reach its highest values in June-July. Stepwise regression analysis was used to identify the meteorological factors influencing coffee rust Rain and temperature explained most of the variation in the coffee leaf rust development.