Plant Parasites of Europe

leafminers, galls and fungi

Oligonychus ununguis

Oligonychus ununguis (Jacobi, 1905)

spruce spider mite

mainly on conifers

Oligonychus ununguis on Picea pungens

Picea pungens, Hungary, Budapest, Bikás park, © László Érsek

Oligonychus ununguis on Picea pungens

infected shoot

Oligonychus ununguis on Picea pungens

much spinning around the base of the needles

Oligonychus ununguis on Picea pungens

the needles are mottled; here and there an egg is visible

Oligonychus ununguis: eggs

characteristically, each egg bear on top a “haie” (recognisable at the far right egg)

Oligonychus ununguis: mite


Oligonychus ununguis: mite

the body bears one, continuous, dark spot.


mites free on the leaves, much webbing. Hibernation as egg. High densities cause notable damage and browning of the needles. The shoots become shortened, the needles fall off prematurely. The trees weaken and grow more slowly under the cover of the fine webs.

host plants


Abies; Aesculus hippocastanum; Alnus; Buxus sempervirens; Cedrus atlantica; Chamaecyparis lawsoniana, pisifera; Cupressus nootkatensis; Euonymus fortunei; Juniperus chinensis, excelsa, oxycedrus, pseudosabina, sabina, virginiana; Picea abies, engelmannii, glauca, orientalis, pungens, sitchensis; Pinus sylvestris; Platycladus orientalis; Prunus domestica; Pseudotsuga menziesii; Quercus; Taxus; Thuja occidentalis; Ulmus.

distribution within Europe

(PESI, 2020).


Paratetranychus ununguis. Oligonychus pini (Hirst, 1924) =?= O. pini Tuttle, Baker & Abbatiello, 1976 is sometimes considered a valid species.


Auger, Garrigue, Fossoud & Migeon (2023a), Bondareva, Zhovnerchuk, Kolodochka, ao (2020a), Geijskes (1939a), Kamaev (2022a), Kontschán, Kiss & Ripka (2018a), Lehman (2002a), Vierbergen (1990a), Yeşi̇layer & Çobanoğlu (2015a), Zhovnerchuk (2014b), Zhovnerchuk, Dudynska & Romanko (2019a).

Last modified 29.v.2023