Analysis - view details of type of pest/disease/disorder |
Symptoms | 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. | |
Impact | 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. | |
Control | Insecticides controlling aphids(see official register of Plant Protection)before the time of flushing or during the activity of the aphids in spring. | |
Hosts | Spruce; | |
Affected plant parts | Needle; |