Elm Savers

Monterey Pine Aphid

Monterey Pine Aphid (Essigella californica)

monterey-pine-aphid_1The Monterey Pine Aphid is a native of North America, its distribution ranges from southern British Columbia in the north to southern Mexico, it eastern range extends to Nebraska, it is also found as far south as Florida in the southeast. It is a recent introduction to Europe and has been identified in both France and Spain; it has also been identified in New Zealand and Southern Brazil. The Monterey Pine Aphid was first recorded in Australia in March 1998 on Pinus Radiata near Canberra; it is now present in all areas across Australia where pine trees are grown.


monterey-pine-aphid_2aThe insect is typical of aphids in its damage to plant tissue, infestations cause browning and the defoliation of pine needles, this weakens the tree. Monterey Pine Aphid infestations are more frequent in drier years; it is also the cause of substantial losses to the plantation industry.

Treatment Options

Elmsavers treats this insect pest in susceptible pinus species by tree injection. We have treated the Canary Island Pines within the gardens at the Burnley Campus, which is a part of The University Melbourne. Tree injection using Neonicotinyls is the most effective method; it can be undertaken throughout the year offering long term control in resinous coniferous trees.


References and acknowledgements & Links

University of Melbourne Burnley Gardens : Andrew Smith. SARDI for Data and Images. http://www.sardi.sa.gov.au/pestsdiseases/pests/biological_control/monterey_pine_aphid Host Susceptibility: New Zealand Plant Protection Society (Inc.) www.nzpps.org

Elm Savers Factsheet
Read and download our factsheets on pests, diseases and treatment methods
  • Plane Tree Anthracnose Plane Tree Anthracnose is becoming commonplace
  • Tree Injection Trials on Giant Sequoia The main emphasis of these trials is on long term systemic control using chemistries that have a broad spectrum of activity.
  • Monterey Pine Aphid It is now present in all areas across Australia where pine trees are grown
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  • Insect Treatments for Eucalypts Eucalypts trees are targeted by a number of deadly pests.
  • Ash Whitefly A small white sap sucking insect, causes leaf damage in Golden and Claret Ash trees.
  • Birch Leaf Spot Birch Leaf Spot is a foliar leaf disease that affects Birch, Aspen and Cottonwood trees and other members of the Betulaceae family.