Dr. Phyto

Norway spruce

Picea abies

Diseases & pests on this plant

• spruce pineapple-gall adelgidAdelges abietis

  Green, pineapple- or cone-shaped galls form at the tips of the new spruce shoots in early summer, each made of swollen needle bases enclosing tiny insects; the galls turn brown and woody and dry open in late summer, after which the shoot tip is often killed or distorted. The neat pineapple-shaped swelling at the shoot tip is unmistakable.

• Phytophthora root + crown rotPhytophthora cinnamomi

  Sudden wilting + collapse of mature trees during summer heat stress, dark sunken cankers at base of trunk often oozing dark sap, root system rotted away to small white feeder roots only, gradual general decline + sparse foliage 1-3 years before final collapse, characteristic V-shaped soil-line lesion when bark peeled back.

• drought stressabiotic_drought_stress

  Wilting leaves that don't recover by morning, leaf edges browning and curling, drop of older leaves, flowering halts, slow recovery only after deep watering.