Symptoms Of Lemon Tree Borer Larvae #1
by Science Photo Library
Title
Symptoms Of Lemon Tree Borer Larvae #1
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Science Photo Library
Medium
Photograph - Photograph
Description
A branch of a lemon tree, Citrus limon, showing damage caused by the presence of the lemon tree borer, Oemona hirta, a cerambycid longhorn beetle native to New Zealand. The adult lays eggs in crevices or damaged bark on twigs, and the larvae burrow inside living wood, excavating a tunnel with occasional small exit holes (below centre) to enable the expulsion of frass and sawdust. Such mined twigs may suffer loss of foliage and dieback beyond the site of the larva. The larvae in twigs eventually mine towards thicker wood, and their presence there can cause branches to break off completely. The life cycle of the beetle takes at least two years to complete. Oemona hirta is a serious pest of citrus orchards in New Zealand, and has a wide host range (polyphagous). It has occasionally been intercepted in imports of plants to the UK from New Zealand, but is not established in the UK.
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August 5th, 2016
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