Quality of seeds of white oats (Avena sativa) and black oats (Avena strigosa) treated with vegetable oil

The objective was to verify the physiological and phytosanitary effect of vegetable oil on seeds of white oats (Avena sativa) and black oats (Avena strigosa). Doses of 0.05; 0.2; 0.4 and 0.8 mL L-1 of emulsifiable vegetable oil (Natur-oil®) (VO) and water in the control treatment. The white oat seeds were distributed on germitest paper roll and then on them, the treatments were sprayed. The black oat seeds were immersed for 30 minutes on the OV doses and later the same methodology was adopted. For both seeds, total germination, germination velocity index (GVI) and mean germination velocity (MGV) were determined. On the last day of germination evaluation, the seeds showing symptoms or presence of fungi were transferred to Petri dishes containing culture medium (PDA). The experimental design was completely randomized, with five treatments and four replicates, containing 50 seeds each. It was observed that the treatments presented no significant statistical differences for the physiological parameters of the seeds. However, the dose of 0.8 mL L-1 of VO showed a fungitoxic effect on the pathogen Rizophus sp., present in black oat seeds.