The occurence ofSipha (Rungsia) elegans is recorded in 11Aegilops species and in two wildTriticum species grown on an experimental plot in Praha-Ruzyně in 1993–1995. Abundance ofS. elegans varied in various years, and the infestation of species tested also differed. The highest aphid number, 0.91 individuals per tiller, was recorded in 1995 at the latest date of counting. In 1994, at the earliest counting date, the lowest aphid number was recorded, i.e. 0.14 individuals per tiller. The highest proportion ofS. elegans, 42–48% of its total number on plants, was recorded in wild einkornT. boeoticum. In all yearsAe. cylindrica, Ae. tauschii andAe. triuncialis were more infested than otherAegilops spp. tested. The aphid number on remaining eightAegilops spp. were either low or varied in particular years.
A certain aphid number was observed on spring wheat plants in isolation strip in all three years. On bothAegilops and wheat plantsS. elegans preferred the upper surface of the flag leaf tips where it caused clearcut yellow patches.