Last modified: Jan. 5, 2024, 10:55 a.m.
In the past it was assumed that it was only one species, but since the publication of Keld Gregersen and Ole Karsholt in Nota Lepidopterologica 40(1):65–85, Taxonomic confusion around the Peach Twig Borer, Anarsia lineatella Zeller, 1839, with description of a new species (Lepidoptera, Gelechiidae) , we know that there are 2 species involved.
The first confirmed observation after 1980 is of a caterpillar found in a peach, origin from Spain, and bought in a supermarket in Zemst (VB) on 30.vi.2023.
Native
Wingspan 11–14 mm.
Yellowish eggs and measure 0.3 to 0.5 mm. They are deposited singly or in groups on flower buds, petioles and young fruit, on the bark, depending on the time of year.
Brown pupae.
The caterpillars usually first feed on terminal growth of twigs, later moving to fruits shortly after the pits start to harden. It overwinters as a partially grown caterpillar, protected in a small silk-covered cell on the bark of fruit trees. Later they pupate on the trunk and larger branches.
The adults are on the wing from May towards early September.
The larva lives on woody Rosaceae, especially on Prunus persica, also on Prunus armeniaca, Prunus dulcis, Prunus domestica, Prunus salicina, Prunus cerasus, and additionally on Prunus spinosa, Malus domestica, Pyrus communis.
It inhabits urban areas and orchards.