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Capnodis tenebrionis

Flatheaded woodborer

Description

Capnodis tenebrionis, commonly known as the flatheaded woodborer or peach rootborer, is a significant pest primarily affecting Rosaceae trees. Its lifecycle involves eggs laid in dry soil near tree bases, with larvae burrowing into the roots and lower stems of weakened trees. This species is oligophagous, targeting hosts such as Prunus (peach, apricot, cherry), Malus (apple), Pyrus (pear), and others. It is distributed across southern and central Europe, North Africa, and parts of Asia.

The larvae form long galleries under the bark, progressively enlarging as they grow. This activity disrupts nutrient and water flow within the tree, leading to reduced vitality and, in severe cases, tree mortality. Infestation results in visible damage and deformities, negatively impacting both the health and aesthetic appearance of trees. Adult beetles also feed on young branches and buds, further exacerbating damage.

Symptom

Infested trees exhibit bark cracking at the base, long frass-filled galleries beneath the bark, and dieback of branches. Larvae create large, irregular tunnels, leading to girdling and localized decay. Leaves may wilt and fall prematurely as the tree deteriorates.

Tree Species: Peach, Cherry, Quince, Hawthorn, Pear, Apple Tree, Apricots, Rose, Cotoneaster

Part of a plant- attacked: Tree trunk

Pest significance: Very harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes