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Sitka spruce aphid – Liosomaphis abietinum
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Symptoms / species
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Impact / measures
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Pictures
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Occurrence map
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 | | Light yellow spots on the needles, later on broad, light to white-yellow cross bands, then large parts of the needles yellow; finally the whole needle reddish brown to violet; needle cast, the current year's needles remaining unattacked; green aphids with red eyes; sooty moulds on the needles.
| | | Affected tree species | Spruce; | | Affected parts | Needle; |
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| Common on various species of spruce; possibilities of errors: mainly early stage of the spruce needle rust Chrysomyxa abietis; especially young trees may be weakened severly and may decline by secondary damaging agents.
Curative measures
Insecticides controlling aphids(see official register of Plant Protection)before the time of flushing or during the activity of the aphids in spring.
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| Sitka spruce aphid damage on Picea pungens, massive browning of needles | | Sitka spruce aphid damage on Picea pungens, loss of needles, spreading upwards on the tree | | Sitka spruce aphid: green body and red eyes | | Yellowing of needles caused by Sitka spruce aphids | | Sitka spruce aphid |
| 2008
Kapfenberg | 2007
Hardegg | 2003
Raaba | 2002
Eberstein | 2001
Gablitz | 2000
Wolkersdorf im Weinviertel | | Bad Vöslau | | Perchtoldsdorf | 1998
Wien 14. Penzing |
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