Effect of planting date and cultivar on grain yield and disease incidence of Fusarium head blight in Moghan region

Kamal Shahbazi, Hassan Khanzadeh, Hossein Karbalaei Khiavi


Fusarium head blight (Fusarium graminearum Schwabe) is an important disease of wheat in the world leading to grains quality and their infection with mycotoxin in addition to yield loss. This study was conducted to determine the best planting date to avoid infection with fungus. Accordingly, five wheat cultivars (Tajan, Falat (control), Moghan 3, N-80-19 and Darya) in combination with four planting dates including 27 October, 11 November, 26 November and 11 December were examined in Moghan Agricultural and Natural Research Station for three consecutive years (2012-2014). The experiment was performed in form of split plots based on Random Complete Block Design (RCBD) with three replicates. The main plots (factors) were planting dates and the subplots were wheat cultivars. Taking note from the disease was done during the period of growth and the effect of disease incidence on grain yield was calculated in all treatments at the end of the season. Based on the results, the highest grain yield was observed in planting date of 11 November. The study on the percentage of wheat infected with FHB indicated a significant reduction of disease from 27 October to 11 December. According to the obtained results, there was a significant yield loss in 27 October due to the increase of FHB percentage. The highest amount of grain yield was obtained in 11 November when the disease incidence was significantly reduced. In planting date 11 November, the line N-80-19 was the best treatment in terms of giving the best grain yield and minimal disease incidence of Fusarium head blight. In general, it is not recommended to culture earlier than 11 November in Moghan region due to the high level of FHB disease and consequently reduction in quality and product yield.

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