Aplica？？o de fungicida em plantas de arroz irrigado e seu efeito na qualidade de sementes durante o armazenamento

the storage of irrigated rice seeds consists of the preservation of seed physiological quality for new crops and may involve fungicide applications to the plant canopy in order to maintain this. the objective of this study was to evaluate the effect of the fungicide mixture of propiconazole+trifloxystrobin applied to the plant canopy at different developmental stages of irrigated rice, on the physiological and sanitary quality of seeds produced and stored in two locations, for six months. the experimental design was randomized blocks with four replications in a factorial scheme (4x2x4), with the factors being: application of the fungicide mixture propiconale+trifloxystrobin on plant canopy at stages r2, r3, r2+r4 and plants with no fungicide applications during the growing cycle; two storage locations (cold and dry chamber and warehouse) and 0, 2, 4, and 6 months of storage. we conclude that the use of two applications of the fungicide mixture (propiconazole +trifloxystrobin) benefits germination and seed vigor, as well as reducing the incidence of fungi associated with seeds; the increase of storage time reduces seed vigor and germination, independent of the storage conditions, but the incidence of fungi associated with seeds in a cold and dry chamber is smaller.