Christmas tree (True fir)-Conifer root aphid

Prociphilus americanus

Pest description and crop damage Tree above ground is stunted and off-color. Below ground colonies of white aphids attached to roots often tended by small ants. In severe cases, replanting may be required as unhealthy trees are slow to recover.

See table:

Management-chemical control

  • spirotetramet (Ultor, Movento)-Appropriate surfactant necessary. (Group 23)
  • thiamethoxam (Flagship 25 WG)-(Group 4)