Eucalyptus Infestations in SF South Bay Area

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.

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)

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.

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.

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.

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

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)

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)

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)

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.

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