Gilletteella cooleyi (Gillette, 1907)
Cooley spruce gall adelgid, Douglas fir adelgid
on Picea, primary hostplant
Picea sitchensis, France, dép. Corrèze, Peyrelevade, 800 m, 14.vii.2020 © Catherine Reymonet
Picea sitchensis, Heerde, de Dellen, 29.x.2011 © Arnold Grosscurt
old gall, cut longitudinally
gall
The gall is elongated, curved, and the needles are not strongly shortened.
host plants
Pinaceae, monophagous
Picea abies, alcoquiana, engelmannii, mariana, orientalis, pungens, sitchensis.
on Pseudotsuga, secondary host plant
Pseudotsuga menziesii, France, dép. Yvelines, Moisson, 2.vi.2018 © Pierre Duhem
Pseudotsuga menziesii, Boswachterij Nunspeet © Hans Jonkman
Pseudotsuga menziesii, Loenen (gld) © Arnold Grosscurt: feeding damage
wax-covered female with eggs
Pseudotsuga menziesii, Landgoed Tongeren © Hans Jonkman: old feeding damage
detail
host plants
Pinceae, monofaag
Pseudotsuga menziesii.
synonyms
Adelges cooleyi.
notes
Originally a species from North America. When in Europe Picea species are not present the species can live permanently, asexually, and without inducing galls, on douglas fir.
references
Albrecht (2017a), Barbagallo, Binazzi, Pennacchio & Pollini (2011a), Béguinot (2006a,b, 2007b), Bellmann (2012a), Börner & Franz (1956a), Buhr (1965a), Carter (1971a), Chinery (2011a), Covassi & Binazzi (1981a), Cumming (1959a), Dauphin & Aniotsbehere (1997a), Görür, Işik, Akyürek & Zeybekoğlu (2009a), Hellrigl (2004a), Kollár (2007a, 2011a), Lambinon, Carbonnelle & Claerebout (2015a), Lambinon & Schneider (2004a), Lampel & Meier (2003a), Redfern & Shirley (2011a), Ripka, Reider & Szalay-Marzsó (1998a), Roskam (2009a), Schneider (2016a), Soria, Carrascal & del Estal (1996a), Wojciechowski, Depa, Halgoš ao (2016a).