The effects of the interaction of barley yellow dwarf virus and take-all fungus on the growth and yield of wheat
1990
Sward, R.J. | Kollmorgen, J.F. (Department of Agriculture and Rural Affairs, Victoria (Australia))
Field and glasshouse trials were carried out to determine the single and combined effects of barley yellow dwarf (BYD) and take-all fungus (Gaeumannomyces graminis var. tritici Walker) on the growth and yield of wheat (Triticum aestivum L.), cv. Condor. Inoculation with viruliferous aphids was done at two growth stages and three rates of take-all fungus were produced. Each pathogen reduced grain yield and increased number of deadheads. In a number of cases, the combined effect of BYD and take-all fungus was greater than a simple additive effect of either pathogen alone. Grain yield per plot was reduced, while the incidence of deadheads was increased, particularly following infection with BYDV after tillering. The symptoms of BYD could be confused with take-all.
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