Lep:Gelechiidae
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35.146 Teleiopsis diffinis (Haworth, 1828)
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early instar larva

 

Food Plant: Rumex acetosella (Sheep's Sorrel), R.acetosa (Common Sorrel)

Mine: August-May;July-August

Notes: In the autumn mines the leaves of R.acetosa, making a long linear mine (as shown), which may form a blotch at the leaf edge. An early instar larva is shown, extracted from this mine. There may be up to three such mines in a leaf, but only one is usually occupied. Mines made by a Mantura sp.(Coleoptera) may look similar, but, if the mine is pressed close to the larva and the larva quickly moves this would indicate the presence of T. diffinis. Later the larvae spin silken tubes on the leaves of the host along the stem or the upper part of the roots. They may subsequently bore into the stem and roots. This is the first time the larva has been observed as a leaf miner and only the second time that R.acetosa has been recorded as a foodplant in Europe (Heckford & Beavan, 2019). Continental authors (Huemer & Karsholt, 1999) state that the spring generation on R. acetosella feed on seeds from silken tubes on the stem.

Data: 18.x.2018, Black Stone, South Devon, VC3

Image:© RJ Heckford

sponsored by Colin Plant Associates (UK) LLP/Consultant Entomologists

www.leafmines.co.uk