Serropalpus barbatus (Schall.)From: Kolk A., Starzyk J. R., 1996: The Atlas of Forest Insect Pests Occurrence: Widespread in Europe, Siberia, the Caucasian Mountains and in the north-eastern part of North America. Host Plants: The common fir and Norway spruce. Morphology: S. barbatus is 8-18 mm long. The body is brown or blackish-brown, elongated, cylindrical, reminds elaterids. Filiform (11 segments) antennae and palpi (4 segments) are reddish. Elytrae are with delicate ridges. The larva is with legs, yellowish-white, up to 25 mm long with two spines bended outward on the last segment of an abdomen. The pupa is yellowish-white and has sparse spines on tergits and pronotum. Biology: Adults are active from July to September. Swarming occurs in the evenings or during nights. A female oviposits about 170 eggs in bark crevices. Larvae excavate tunnels in the wood up to 5.5 cm in depth and 4.0-5.5 mm in diameter. Galleries run in different directions and are filled with the densely packed saw dust. Larvae overwinter in wood and continue feeding again in spring. At the end of the development, larvae form pupal chambers perpendicularly to the surface of wood and pupate there with the heads outward. Adults emerge through oval exit holes of 2-6 mm in diameter. The entire cycle lasts for 2 years, sometime 3 years. Damage: S. barbatus is not considered a serious technical pest of fir and spruce timber. It has a tendency to be locally abundant, particularly in the mountains, in woodlands damaged by a wind. It develops in the same substrate for several generations. Preventive measures and control: Removal of susceptible material from the forest. The timber infested by S. barbatus should be removed and processed. In some cases chemical treatment is recommended.
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Forest Pests: Insects, Diseases & Other Damage Agents |
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