EFFECT OF SOWING DATE ON OCCURRENCE AND SEVERITY OF BARLEY YELLOW DWARF VIRUS (BYDV) IN DIFFERENT WHEAT CULTIVARS

Published in Scientific Papers. Series A. Agronomy, Vol. LX
Written by Reza AGHNOUM, Mahmoud NAZERI, Ali Akbar MOAYEDI, Bahman KOUHESTANI

Barley yellow dwarf virus (BYDV) is considered as the most important viral disease of cereal crops in several Asian countries including Iran. Field studies were conducted to determine the effect of planting date on naturally occurring barley yellow dwarf virus (BYDV) incidence in different wheat genotypes. The experimental design was a split-plot arrangement in a randomized complete block with three replications. Eight seeding dates (SD) at one month intervals were assigned to main plots. Fourteen cultivars (Twelve bread wheat, one durum wheat and one triticale cultivar) were subplots that randomized within each main plot. The effect of sowing date, cultivar and the interaction between sowing date and cultivar grain yield and KTW was statistically significant. Our results indicated that wheat genotypes showed different level of BYDV infection in different sowing dates. There was a high correlation between the growth habit and the level of BYDV severity. In general, the spring wheat cultivars, except the durum cultivar, Behrang, showed more BYDV infection than the winter cultivars. Most of the susceptible cultivars showed their highest level of infection in the first sowing date. Our results demonstrated the role of planting date in the level of BYDV infection and can be used to recommend modifying the sowing dates as a means to escape the disease in the BYDV hot spot regions.

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AGHNOUM R., NAZERI M., MOAYEDI A.A., KOUHESTANI B. 2017, EFFECT OF SOWING DATE ON OCCURRENCE AND SEVERITY OF BARLEY YELLOW DWARF VIRUS (BYDV) IN DIFFERENT WHEAT CULTIVARS. Scientific Papers. Series A. Agronomy, Vol. LX, ISSN 2285-5785, 191-196.


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