Effect of nitrogen fertilization on seed-borne Fusarium species in oat
2016
Guo, Wei | Chen, Yuanhong | Al-Rewashdy, Yasamin | Foran, Nicholas | Ma, Baoluo | Yan, Weikai | Fregeau-reid, Judith | Liu, Jinghui | Ren, Changzhong | Pageau, Denis | Vera, Cecil Lautaro | Xue, Allen
Fusarium head blight (FHB) is a common disease of oat and resistant cultivars are not available in Canada. The effect of nitrogen (N) fertilization on incidence of seed-borne Fusarium spp. was evaluated under natural field conditions in three locations (Ottawa, Ontario; Melfort, Saskatchewan; Normandin, QuĂŠbec) in Canada in 2013 and 2014. At each site, oat cultivars, CDC Morrison, AAC Nicolas, and AAC Noranda, were used under four levels of N fertilization (0, 50, 100 and 150 kg N ha-1). Of the seven Fusarium spp. recovered, F. poae, F. equiseti, F. graminearum, F. sporotrichioides, and F. avenaceum were the most common species, and isolated from 9.6, 1.3, 1.1, 1.0, and 0.3% of the harvested grain representing 72, 10, 8, 7, and 3% of the pathogen population, respectively. The remaining species including, F. acuminatum and F. oxysporum, were each recovered from a single seed only. A significant N treatment effect (P
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