The aim of the present study was to evaluate the efficacy of
some chemical compounds to management rust disease on
common bean under greenhouse and field conditions. In
vitro, the effect of four chemical compounds, i.e. phosphoric
acid at concentrations 0.3 and 0.6%, benzoic acid, Bion®
(BTH), and pyrocatechol at concentrations 4 and 8 mM from
each, as well as fungicide, Tilt 25%, 0.25 and 0.5 cm3/l water
on urediniospores germination of Uromyces appendiculatus
was tested on water agar medium. All these compounds
decreased the germination of urediniospores percentage.
Under greenhouse and field experiments, application of these
compounds led to decrease in disease incidence compared to
the control treatments. Benzoic acid at 2015 growing seasons
was the most effective in reduction of disease incidence more
than the other compounds, whereas the disease incidence
decreased from 59.92 to 21.43% and from 68.43 to 18.41%
under greenhouse and field conditions, respectively.