Journal of Pest Science (2004) 77, 119-122

Malgorzata Skrzypczynska (2004)
Studies on population frequency of insects and mites causing galls on the leaves of the European aspen Populus tremula L. in southern Poland
Journal of Pest Science 77 (2), 119-122
Abstract: Species composition of galls on the leaves of Populus tremula L. was studied in 2002-2003 in two localities: the Ojców National Park and the Andrychów Forest District. A total of 2,199 galls were found, 1,522 of which were found in 2003. The galls were caused by ten insect or mite species. The species composition of the galls was similar in these two consecutive years. Phyllocoptes populi (Nalepa) was the most abundant species in both areas in 2003. The index of occurrence frequency (F) value was highest in the case of P. populi, namely 0.280 in the Ojców NP (2003), and lowest , i.e. 0.00002, for Trichiocampus grandis (Lepeletier) at both sites in 2003, and for Contarinia petioli (Kieffer) in the Ojców National Park in 2002. The highest value for Agrell's index of species co-occurrence , i.e. 0.944, was found for Harmandia cavernosa (Rübsaamen) and H. tremulae (Winnertz) (Ojców NP, 2002), and the lowest (0.050) for T. grandis and H. globuli (Rübsaamen) (Ojców NP, 2003).
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Malgorzata Skrzypczynska

Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Contarinia petioli	Poplar/aspen (Populus)	Poland
	Harmandiola tremulae	Poplar/aspen (Populus)	Poland
	Harmandiola cavernosa	Poplar/aspen (Populus)	Poland
	Harmandiola globuli	Poplar/aspen (Populus)	Poland
	Phyllocoptes populi	Poplar/aspen (Populus)	Poland
	Trichiocampus grandis	Poplar/aspen (Populus)	Poland