Aphid vectors of barley yellow dwarf virus in Hungary
1990
Rakk, Z.V. | Milinko, I. (University of Agricultural Sciences, Keszthely (Hungary))
During 1980-86, the aphid species Sitobion avenae (Fabricius), Rhopalosiphum padi (L.), and Metopolophium dirhodum (Walker) were the most prevalent aphids on cereal crops grown in Hungary. Other species occurred in a relatively low frequency. S. avenae started to appear by mid-May on winter wheat (Triticum aestivum L.) and winter barley (Hordeum vulgare L.), and colonies, mainly present on the spikes, reached maximum during the second half of June. Winter wheat, winter and spring barley, and oats (Avena sativa L.) were equally important host plants for R. padi, which was dominant throughout the season. The first winged individuals started to appear by mid-May, reaching maximum during the second 10 days of June. M. dirhodum were often present on leaves of winter wheat, winter barley, oats, and maize (Zea mays L.), but not on rye (Secale cereale L.). R. padi had the greatest fluctuations in annual numbers. There was no barley yellow dwarf epidemic in 1985 due to the severe winter of 1984-85, followed by unfavorable conditions for aphid multiplication in the spring.
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