The objective of this work was to evaluate the control of soybean rust (Phakopsora pachyrhizi) using seed dressing with fluquinconazole integrated with fungicides spraying in soybean above ground parts. Two experiments were carried out, in the crop season 2006/07, at Dourados, MS and Paulinia, SP, using soybean seeds of the cultivars BRS 245 RR and CD 208, respectively. Soybean rust severity, defoliation and yield were evaluated in this experiment. The experimental design was a randomized complete block, with four replications, using a factorial arrangement of 2x5 with two treatments of seeds, with and without fluquinconazole, and five combinations of foliar fungicide mixtures applications. The results observed in these experiments showed that the addition of fluquinconazole to standard seed treatment in soybeans, without considering the foliar fungicides application, delayed the soybean rust progress, and showed significant difference from standard seed treatment without fluquinconazole in relation to disease severity and defoliation, but not for grain yield. Considering the integration of seed treatment with fluquinconazol and foliar fungicides application, in the majority of the evaluations of rust severity and defoliation, as well as in relation to grain yield, no significant interaction between these two practices was observed. The foliar fungicides application were effective in the control of soybean rust, providing lower levels of disease severity and defoliation and higher grain yield, in relation to untreated control. No phytotoxic effects on soybean plants due to use of fluquinconazole on soybean seeds were observed.
yield; defoliation; seed treatment
