EFFECT OF CHEMICAL CONTROL OF ALS (PSEUDOCERCOSPORA GRISEOLA) ON SEED YIELD OF TROPICAL BLACK BEAN CULTIVARS IN VERACRUZ, MEXICO

摘要

In Veracruz, Mexico, angular leaf spot (ALS) caused by the fungus Pseudocercospora griseola (Sacc.) Ferraris, is a disease that affects bean yields in both cropping systems, rainfed and residual soil moisture (Lopez et al., 2006; Tosquy et al., 2012).This situation becomes more critical, as most local farmers grow landraces and black bean cultivars introduced from different places such as the USA; both of these type of cultivars have shown susceptibility to bean diseases such as ALS. In addition, producers do not apply fungicides for disease control. The aim of the study was to determine the effect of ALS chemical control on seed yield performance of tropical black bean cultivars by applying dithiocarbamate, a non-systemic agricultural fungicide.