Giant Conifer Aphids
- up to 1/5 inch long; large aphids with long legs
- purple to black in color; bodies may have a coating of grayish-white powder
- winged or wingless
Host Plants, Diet & Damage
- found on many species of conifer, including juniper\
- feed on bark, twigs, foliage and roots
- honeydew production can lead to black needles (sooty mold)
Biology, Life Cycle & Damaging Life Stage
- overwinter as eggs on bark or needles
- emerge in spring from eggs
- often found in large groups on host trees
- Giant conifer aphids have little negative effect on tree health; tolerate pest.
- Spray with high pressure water to dislodge aphids.
- Use insecticidal soap.
- Apply a systemic insecticide (neonicitinoid) in the spring.