Eucalyptus Infestations in SF South Bay Area

As of this date I've examined 306 eucalyptus trees for infestation by either lerp-psyllids or Australian tortoise beetles in the parks and preserves that I frequent in the South San Francisco Bay Area. Here's the breakdown:

  • Baylands Park: 202 trees inspected; no bug infestation found, but there were a few leaves with a fungus infection.
  • Sierra Azul: 23+ trees inspected. Infestations by both lerp-psyllids and tortoise beetles found on all blue gums. Only lerp-psyllid infestation found on river red gums.
  • Edenvale Park: 20+ trees inspected. Infestations by both lerp-psyllids and tortoise beetles found on all trees.
  • Almaden Lake Park: 50+ trees inspected. Infestations by both lerp-psyllids and tortoise beetles found on all trees. I also saw a tree infested with Ophelimus maskelli here.
  • Rancho San Antonio Preserve: one tree inspected. Infestation by tortoise beetles found. Possible infestation by lerp-psyllids as well.
  • Bay Trail (near water treatment plant): 10+ trees inspected. Infestations by lerp-psyllids found on all trees.
Posted on September 05, 2016 03:28 PM by truthseqr truthseqr

Observations

Photos / Sounds

What

Tasmanian Blue Gum (Eucalyptus globulus)

Observer

truthseqr

Date

April 26, 2016 01:52 PM PDT

Description

Huge eucalyptus tree with peeling bark, long and pointed aromatic leaves, and nuts with + pattern. All the leaves I saw had bite marks along the edges.

This park, which is adjacent to the Hayes Mansion in San Jose, used to be an amusement park called Frontier Village, and prior to that it was part of the Hayes estate.

Photos / Sounds

What

Tasmanian Blue Gum (Eucalyptus globulus)

Observer

truthseqr

Date

May 15, 2016 11:37 AM PDT

Description

This is a massive tree with shaggy bark and aromatic leaves.

Photos / Sounds

What

River Redgum (Eucalyptus camaldulensis)

Observer

truthseqr

Date

August 7, 2016 09:04 AM PDT

Description

This tree has multiple trunks (I counted 7), each 2-3" in diameter. Bark is peeling. Height: ~16'

Leaves are stalked, broad at the base, tapering to the tip. The adult leaf color is a dull blue-green. Stems are reddish.

This tree caught my attention due to its infestation with eucalyptus redgum lerp psyllids, Glycaspis brimblecombei (see http://www.inaturalist.org/observations/3848076)

2016-08-21, added three more pictures to show the tree, multiple trunks, and flower buds.

Photos / Sounds

What

Red Gum Lerp Psyllid (Glycaspis brimblecombei)

Observer

truthseqr

Date

August 7, 2016 09:04 AM PDT

Description

Leaves of river red gum, Eucalyptus camaldulensis, covered with eucalyptus redgum lerp psyllids, Glycaspis brimblecombei. (Reference: http://ipm.ucanr.edu/PMG/PESTNOTES/pn7460.html)

(Sierra Azul; Priest RockTrail)

Photos / Sounds

What

Australian Tortoise Beetle (Trachymela sloanei)

Observer

truthseqr

Date

April 26, 2016 01:52 PM PDT

Description

Infestation of blue gum eucalyptus with Australian Tortoise Beetle. All the leaves on this blue gum eucalytus had evidence of chewing. I couldn't find a single leaf that wasn't affected, either on the tree or in the leaf litter. I learned from @sea-kangaroo that the leaf bite marks are from introduced Australian Tortoise Beetles.

This tree is representative of approximately 19 blue gum eucalyptus trees in this park - all of which appear to be infested with the beetle. (Note: I won't submit an observation for each one unless the study director needs this data.)

See the following observation for identification of the tree itself:
http://www.inaturalist.org/observations/3040542

2016-08-24, I added a photo of a broken limb with dried leaves. Notice that all the leaves have evidence of chewing.

2016-08-30, Now that I know to look under the bark for the beetles, I saw dozens of them today and photographed a few. Added 3 new photos.

Photos / Sounds

What

Red Gum Lerp Psyllid (Glycaspis brimblecombei)

Observer

truthseqr

Date

August 24, 2016 03:34 PM PDT

Description

Eucalyptus tree infested with lerp psyllid. I'm not sure what species this tree is, so I included pictures of the leaves and trunks as well as infected leaves.

Notice that this tree has been tagged with two spray-painted blue dots for some reason.

At least 3 eucalyptus trees in this park are infested.

Photos / Sounds

What

Red Gum Lerp Psyllid (Glycaspis brimblecombei)

Observer

truthseqr

Date

August 25, 2016 03:15 PM PDT

Description

Red Gum Lerp Psyllid infestation of eucalyptus tree. Ophelimus maskelli was co-existant on this tree.

This tree is representative of at least a dozen or more eucalyptus trees in this park. I saw signs of lerp psyllid on all of them.

Some of these trees were marked with spray-painted blue dots on the trunk - don't know what this means.

Photos / Sounds

What

Australian Eucalyptus Leafgall Wasp (Ophelimus maskelli)

Observer

truthseqr

Date

August 25, 2016 03:19 PM PDT

Description

Ophelimus maskelli infestation of eucalyptus tree. Red Gum Lerp Psyllid was also co-existant on this tree.

It looks like the tree was cut down awhile ago and several new shoots grew from the cut trunk. Now it is greater than 20' tall again.

See discussion: https://www.inaturalist.org/observations/17114164

Photos / Sounds

What

Tasmanian Blue Gum (Eucalyptus globulus)

Observer

truthseqr

Date

August 27, 2016 06:58 AM PDT

Description

Tasmanian Blue Gum Eucalyptus in flower (late August).

I counted 202 blue gum trees (give or take a few) in the Baylands Park this morning. None showed evidence of infestation by lerp psyllids or tortoise beetles.

However, some of the leaves were spotted with lesions, possibly due to the fungus Kiamyces sp. Eucalyptus. (Reference: http://www.fao.org/docrep/007/y5041e/y5041e09.htm Plate 10.1)

Photos / Sounds

What

Silver Dollar Gum (Eucalyptus polyanthemos)

Observer

truthseqr

Date

August 27, 2016 09:31 AM PDT

Description

Eucalyptus (Baylands neighborhood)

I'm guessing at the ID, so please correct me if I'm wrong.

Photos / Sounds

What

Australian Tortoise Beetle (Trachymela sloanei)

Observer

truthseqr

Date

August 28, 2016 10:12 AM PDT

Description

Beetle damage on Tasmanian blue gum eucalyptus.

I found about a dozen beetles or beetle carcasses under the bark of this tree.

This tree is a "stand alone" that is separate from the grove of trees further down the trail.

(Sierra Azul; Priest Rock Trail)

Photos / Sounds

What

Australian Tortoise Beetle (Trachymela sloanei)

Observer

truthseqr

Date

August 28, 2016 10:41 AM PDT

Description

Beetle damage on Tasmanian blue gum eucalyptus trees.

This observation is representative of the entire grove of 20 massive trees plus a few dozen saplings that all seem to be infested with Australian Tortoise Beetles based on chewing damage to the leaves.

I found at least one beetle on each of the 20 massive trees by peeling back the bark.

(Sierra Azul; Priest Rock Trail)

Photos / Sounds

What

Red Gum Lerp Psyllid (Glycaspis brimblecombei)

Observer

truthseqr

Date

September 2, 2016 01:28 PM PDT

Description

Infested Blue Gum Eucalytptus (Almaden Lake Park)

This tree was infested with both lerp psyllids and Australian Tortoise Beetles. You can see at least two psyllids and some lerps in the first photo. The second photo is the tree itself.

NOTE: This tree is representative of over 50 eucalyptus trees in this park. I closely inspected 6 of them and found evidence on all of them of chewing damage and lerp psyllid infestation.

Photos / Sounds

What

Australian Tortoise Beetle (Trachymela sloanei)

Observer

truthseqr

Date

September 2, 2016 01:26 PM PDT

Description

Infested Blue Gum Eucalytptus (Almaden Lake Park). The first photo shows a dead beetle. I don't know why it's white, but I've seen many like this. Note the chewing damage in the leaf litter.

NOTE: This tree is representative of over 50 eucalyptus trees in this park. I closely inspected 6 of them and found evidence on all of them of chewing damage and lerp psyllid infestation. The beetles are harder to find - you have to peel back the bark. This is a very popular park, and people were giving me dirty looks for peeling back the tree bark, so I stopped after getting these pictures.

Photos / Sounds

What

Australian Tortoise Beetle (Trachymela sloanei)

Observer

truthseqr

Date

September 4, 2016 09:54 AM PDT

Description

Tasmanian blue gum eucalyptus infested with Australian Tortoise Beetle (Lower Meadow Trail).

I was really hoping this grand old tree wasn't affected, but it is badly infested. It might also have lerp psyllids, but the leaves were too high up on the tree to tell.

See the following observation for the tree itself:
http://www.inaturalist.org/observations/3192023

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