Wydanie 341(46)2 2018

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Population Dynamics and Spatial Distribution of Panaphis juglandis (Goeze, 1778) (Hemiptera: Aphididae) on Common Walnut (Juglans regia L.)
(Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2018) Krzyżanowski, Robert; Department of Biochemistry and Molecular Biology, Siedlce University of Natural Sciences and Humanities, Poland
Common walnut (Juglans regia L.) has gained recognition in Poland as an ornamental species in city environments. More frequent use of walnut in the city landscape has induced a more thorough analysis of the factor that causes a significant decrease in the decorative values of this tree. The aim of this paper was to trace population dynamics and spatial distribution of Panaphis juglandis (Goeze 1778) occupying the J. regia trees. The studies were conducted on walnut trees (J. regia) in Siedlce in the years 2010–2012. Three tree stands in home gardens were selected for observation (H1, H2, H3) and one near the street (H4). Results showed that higher aphid population was found on the studied tree at the street stand in relation to the home gardens trees. P. juglandis were observed on trees growing in street-side stand, where it formed colonies along the main vascular vein on the top part only of the first three external leaflets.