Argyresthia thuiella (Packard, 1871)
Thuja occidentalis © Thérèse Arcand, Natural Resources Canada, Canadian Forest Service
© John A. Weidhass, Bugwood.org
The egg is deposited not far from the tip of a shoot, usually at the underside. The larva mines one leaf after the other, working in the direction of the base of the twig. After hibernation the larva mines some hundred leaves more (up to five leaves can be dispatched daily). Most frass is ejected by 1 to three openings in the mine (after service they are closed with silk). Pupation is within the mine in Soft cocoon. The mined twig containing the pupa generally drops to the ground (Silver, 1957b; van Frankenhuyzen, 1974b).
Larvae from mid-July to end of May. Hibernation in a light spinning in the mine.
BE recorded (Phegea, 2010).
NE recorded since 1971 (van Frankenhuyzen & Houtman, 1972a; van Frankenhuyzen, 1974a)
LUX not recorded (Fauna Europaea, 2010).
distribution within Europe
From Germany and Poland to the Alps and Hungary (Fauna Europaea, 2010). Originally a North American species.
The body is greenish to brown; head, prothoracic and anal plates are dark brown to black. See also Konečná (2013a), Konečná & Šefrová (2014a) for a detailed description.
Abdomen characteristically curved; cremaster with 10 hooks (Silver, 1957a; Patočka & Turčáni, 2005a).
Sometimes a pest in gardens.
Agassiz (2004a), Baran (2008a), Burger ao (1984a), Burmann (1989a), Csóka (2001a, 2003a), van Frankenhuyzen (1974b), van Frankenhuyzen & Houtman (1972a), van Frankenhuyzen Houtman & Kabos (1982a), Freeman (1967a), Kirichenko, Augustin & Kenis (2018a), Kollár (2007a), Kollár & Hrubík (2009a), Konečná (2013a), Konečná & Šefrová (2014a), Kurir (1983a), Matošević, Pernek, Dubravac & Barić (2009a), Patočka & Turčáni (2005a), Plate & Köllner (1977a), De Prins (1998a), De Prins & Steeman (2011a), Sefrová (2005a), Silver (1957a, b), Stigter & van Frankenhuyzen (1992a).