Effectiveness of seed treatment against Fusarium spp. and Cochliobolus sativus of spring barley in different conditions
Estonian Crop Research Institute, J. Aamisepa 1, EE48309 Jõgeva, Estonia
Effect of fungicide seed treatments on initial growth of spring barley (Hordeum vulgare L.) was evaluated in greenhouse trials. The soil collected from minimum tillage fields where spring barley, spring wheat (Triticum L.) and oilseed rape (Brassica napus L.) have been cultivated in previous growing season were used in trials. Eight fungicide seed treatments and untreated seed as the control were evaluated. Root rot severity and seedling emergence rate were assessed at growth stages 20–22. In addition the incidence of seed-borne Fusarium spp. and Cochliobolus sativus and germination were assessed in treated and untreated spring barley seeds in laboratory condition. Fungicides prothioconazole and tebuconazole significantly reduced incidence of seed-borne Fusarium spp. Seed treated with fludioxonil and tebuconazole more effectively decreased root rot infection in soil from minimum tilled barley field, fludioxonil + difenoconazole in soil from minimum tilled spring wheat field and prothioconazole mixes with tebuconazole or fluoxastrobin in soil from minimum tilled oilseed rape field. This study brings out the pre-crop and seed treatment interaction effect on control of root rot in spring barley.