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MESQUINI, R.M.; SCHWAN-ESTRADA, K.R.F.; VIEIRA, R.A. and NASCIMENTO, J.F.. Control and temporal progress of Asian soybean rust under alternative control in the field. Summa phytopathol. [online]. 2011, vol.37, n.1, pp.24-29. ISSN 0100-5405. http://dx.doi.org/10.1590/S0100-54052011000100004.
The aim of this work was to evaluate the control and the temporal progress of Asian soybean rust, caused by Phakopsora pachyrhizi, under management with alternative treatments. Thus, an experiment was carried out under a randomized block design, in Itambé, municipality, Paraná State, Brazil, during the cropping season 2007/2008. The alternative treatments were: citric biomass, crude extract and essential oil of Eucalyptus citriodora and kefir grains. Chemical control using azoxystrobin + cyproconazol + adjuvant 0,5v/v was also evaluated. Disease severity (in five evaluations), area under the disease progress curve (AUDPC), disease progress rate, productivity and 1000 grain weight were used for comparison among treatments. Significant differences (Pd"0,05) were observed for severity, AUDPC and disease progress rate. In general, citric biomass and kefir grains had the highest control indexes and lower disease progression rates among the alternative treatments showing to be superior to the treatments with crude extract and essential oil of E. citriodora. However, azoxystrobin + cyproconazol were more efficient to control the disease and led to the lowest progress rates, relative to the alternative treatments.
Keywords : Glycine max; Phakopsora pachyrhizi; Eucalyptus citriodora.