The State of Parana is the biggest brazilian producer of white oat (Avena sativa L.) grains, with significant increase in the harvest area each year. The study was achieved in Londrina, State of Parana, where the assay were developed in laboratory and field. The objective was to evaluat the effect of the seed treatment and sowing depth, in the seedling emergence plant development, in the microorganisms population of the rizhosphere and rizoplane of the planting area of plants and production of oat grains. Seeds of white oat, cultivar OR-11, were sown in the depths of 3cm, 5cm and 8cm. It were used fungicides in dosages of g.i.a./100kg of seed, carboxim+thiram (93.7g+93.7g), thiram (210g) and triadimenol (50g) and the bilogical product kodiak C (Bacillus subtilis) (60g). The treatment with the fungicides and the biological product eliminated the fungi presents on the seeds, such as: Fusarium avenae, Colletotrichum graminicola and Helminthosporium avenae and improve the plant development and the soil microorganisms, being this variable with the sowing depth and the treatment.
seed treatment; microorganisms; fungicides; sowing depth
