Fungal and seed treatment interference in the viability of Coriander seeds

Resumo

The determination of the sanitary quality is important to diagnose if the commercialized lots are free of pathogens and to make a decision about the need for seed treatment. The objective was to evaluate the interference of fungi associated with coriander lots seeds in their physiological performance and the effect of seed treatment with the fungicide (Metalaxyl-m + Fludioxonil). The study was carried out in two steps. In experiment I, the physiological potential and sanitary characterization of coriander seeds were evaluated, using the tests, water content, tetrazolium test and health test. In experiment II, it was evaluated whether the physiological performance of coriander seeds with and without fungicide treatment  using the first count and germination test. Coriander seeds have high physiological potential. Lots of coriander seeds showed high physiological potential, however, not all lots expressed their maximum potential in the germination test without treatment, due to the negative effect of fungi associated with seeds, mainly A. dauci and in association with A. alternata. There was an improvement in the physiological performance of coriander seeds treated with Metalaxyl-m+ Fludioxonil fungicide.