WHITE MOLD ON COMMON BEAN RELATED TO PLANT DENSITY, FUNGICIDE, IRRIGATION AND APPLICATION OF TR1CHODERMA SPP.

摘要

Common beans are staple food in Brazil. Bean diseases caused by soilborne pathogens, like white mold by Sclerotinia sclerotiorum, have increased in the last years, especially during the "winter season", in the irrigated areas, because the growers do not properly manage the irrigation, leading to high relative humidity and soil moisture conditions. No single treatment provides a satisfactory disease management, but some practices used simultaneously may be effective to control white mold. Low temperature, high humidity and plant canopy and/or soil surface wetting favour disease progress. Therefore, wider row and/or plant spacing may provide less favourable environmental conditions due to better light penetration into plant canopy and soil, and more ventilation.