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Symptoms
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Luxurious feeding (holes, scraping) on the lower needle surface of firs or irregular feeding from the rim on spruce needles; the needles turn red and become curled; on Taxus feeding from the rim in form of small „bays“
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Impact
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Even intense damage doesn't endanger the plants, since, especially with Phyllobius, only the youngest needles are affected; repeated damage may lead to loss of increment; in Christmas tree production more important.
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Control
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Removal of the beetles, use of insecticides, as soon as the first damage by the imagos are discovered (see official register of Plant Protection)
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| Hosts |
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Douglas fir;
Yew;
Spruce;
Hemlock;
Pine;
Larch;
Fir;
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| Affected plant parts
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Needle;
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Phyllobius: early symptom, single spruce needles damaged
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Phyllobius: red-brown, curled needles on shoots of fir caused by intense feeding
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Damage to a young Douglas fir, furrow-like feeding on the lower needle surface
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Otiorhynchus: typical bay-like feeding pattern from the rim of Taxus-needles
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Phyllobius: luxurious scraping on fir needles
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Phyllobius on spruce
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