Dip:Agromyzidae
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Melanagromyza lappae (Loew, 1850)
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puparium

Food Plant: Arctium lappa (Greater Burdock), A.minus (Lesser Burdock)

Mine: Summer

Notes: An internal stem borer. The larva makes a short leaf mine into the midrib and then down into the main stem, forming a long channel in the pith. The larvae feed throughout the summer with pupariation taking place in the autumn. The adults emerge the following spring. Plants below 2 feet in height contain few feeding channels or puparia. Stems >20mm diameter have more feeding signs than narrower stems. A puparium is shown along with feeding channels in the pith of the stem. Puparia, which are orange yellow, are found at various points within the stem. Puparia turn whitish grey after emergence of the adult. The adjoining posterior spiracles have processes with 16-22 bulbs and also a strong central horn. Probably an under recorded species.

Data: late autumn. winter 2017/early months 2018, East Yorkshire, VC61

Image:© Barry Warrington

Recording Grade: 4

References:
Robbins, J (1990) - A Provisional Atlas of The Leaf Miners of Warwickshire.
Spencer, K A (1972) - "Diptera: Agromyzidae" Handbooks for the Identification of British Insects, Royal Entomological Society of London
Spencer, K A (1976) - The Agromyzidae of Fennoscandia and Denmark

Warrington, B P (2018) - The larval habits and rearing of Melanagromyza lappae Loew (Diptera Agromyzidae), Dipterists Digest 25, 1, 25-29

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

www.leafmines.co.uk