مطالعه بیماری زنگ قهوه‌ای گندم تحت تاثیر تاریخ کاشت و رقم در استان گلستان

The aim of this experiment was to investigate the effect of planting date, cultivar and their interaction on wheat brown rust disease in Golestan province in the 2015-2016 crop year at Gorgan Agricultural Research Station. Experimental factors include planting date in 5 levels (including 23 October, 11 November, 1 December, 21 December, 10 January) and cultivar in 5 levels (Gonbad, Morvarid, N-87-20, N-91-8 and N -91-9) Traits of brown rust incidence and severity were measured in this experiment. Based on the results of this experiment, the effect of planting date, cultivar and the interaction effect of planting date and cultivar on the incidence of brown rust disease and the percentage of severity of wheat rust disease were significant at the level of 1% probability. Based on the results no wheat rust was observed in the planting dates of 21 December and 10 January. On the date of planting 23 October in Morvarid and N-87-20 cultivars, the incidence of brown rust was 0.86 and 1.58 respectively, and no symptoms was observed on other cultivars. On the date of planting 11 November in Morvarid and N-87 -20, the incidence of brown rust was 0.47 and 0.62 respectively and for other cultivars it was zero. No disease was observed in Gonbad, N-91-8 and N-91-9 cultivars in all planting dates . In general, based on the results of this experiment, it can be stated that all the studied cultivars can be planted on the date of planting on 21 December and 10 January, without the occurrence of brown rust disease, and on the date of planting 23 October, 11 November, 1 December Gonbad, N-91-8 and N-91-9 cultivars are recommended without the occurrence of wheat brown rust disease.