GSOB Survey

Current Survey:

Tree(s) Surveyed
Healthy / Unaffected
Injured / Affected
Recently Dead (< 1 yr)

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Healthy Tree Data

Finish

Species

Size

Injured Tree Data

Tree Data:

Injury Data:

Finish

Species

Size

Crown Rating

Leaf Damage

Leaf-Feeding
Leaf Feeding
Skeletonization
Skeletonization
Discoloration / Mildew
Leaf Discoloration
Leaf Rolling / Tiering
Leaf Rolling
Leaf / Twig Galls
Leaf Gall
Oak Mistletoe
Mistletoe
Done

Discoloration and/or Staining


(Step 1 out of 7)
Any spots which are stained or oozing on any bark surface.

Holes


(Step 2 out of 7)

Insect Emergence Holes on Bark

Circle:


Oval:


D-Shaped:


Fungus


(Step 3 out of 7)

Mushrooms and Fungal Fruiting Bodies

Mushrooms at Base of Tree
Sloughing
Charcoal Canker
Sloughing
Sloughing Bark
Sloughing
Carbon Balls
Carbon Balls
Decay Fungus Conk
Fungus Conk

Caterpillar Cocoons


(Step 4 out of 7)
Caterpillar Cocoons
Cocoons

Woodpecker


(Step 5 out of 7)

Woodpecker Damage

Bark Flaking
Woodpecker Foraging
Sapsucker Holes (Rows of Holes)
Woodpecker Foraging
Acorn Holes
Woodpecker Foraging

Insect Larval Galleries


(Step 6 out of 7)

Insect Larval Galleries (Feeding Patterns)

Only observe galleries if the wood is exposed or bark is flaking off. Do not injure tree to observe symptoms.


Irregular Pattern on Wood (1/8 in.)
Irregular Pattern
Irregular Pattern on Wood (1/4 in.)
Irregular Pattern
Straight Lines Across Wood Grain (1/8 in.)
Straight Lines
Irregular Damage to Outer Bark
Irregular

Insect Frass


(Step 7 out of 7)

Insect Frass

Only observe frass if the wood is exposed or bark is flaking off. Do not injure tree to observe symptoms.


Granular and Tightly Packed
(Dark color between bark & wood)
Granular
Fibrous and Loosely Packed
(Light color between bark & wood)
Fibrous
Pellet-like in Outer Bark
(Has silk-like threads)
Pellets
White Powder on Outer Bark
(Fine like sawdust)
White Powder

Cause of Injury

Suspected Cause of Injury

Insect:

Disease / Fungus:

Other:

Done

Coast Live Oak

Coast live oak is very common in urban landscapes in southern California. This is an evergreen oak species with a broad crown and smooth bark that is common in urban and forest settings. Leaves are leathery and cupped or flat shaped with margins spiny or round. Leaves are oval, oblong, or elliptically shaped and glossy green above. The underside of the leaf may be fuzzy or only possess hairs at vein crotches. Acorns are sharply pointed and elongated.

Close

California Black Oak

California black oak is a deciduous tree found at higher elevations (4,000-8,000 ft). The leaves are bright green and deeply lobed with spines on the tips. The bark is dark in color and ridged in older trees. Acorn cups are deeply cup-shaped with thin, paper-like scales. California black oak is prevalent throughout the mountains in southern California.

Close

Engelmann Oak

This is a semi-deciduous tree species with a rounded crown. The bark is grayish and scaly. Leaves are pale-green, leathery, and flat and are rounded at the tip. Acorns have a rounded tip and the cups enclose nearly half of the seed. This species has a limited distribution in lower elevation oak woodlands in San Diego, Riverside, and Los Angeles Counties.

Close

Valley Oak

Valley oak is a deciduous tree with thick, furrowed bark. Leaves are deeply lobed with 6-10 rounded lobes. The upper surface is a shiny dark green while the underside is pale green with short, dense hairs. Acorns are long, conical with warty scales on the cup. Common in the Santa Monica Mountains and northwest of Los Angeles. Valley oak is found primarily in the Santa Monica Hills region and along Interstate 5, north of Los Angeles.

Close

Canyon Live Oak

This is an evergreen tree that is found in the higher elevation forests (4,000-8,000 ft) and commonly has multiple stems. Leaves are leathery, typically flat, and wedge-shaped with spiny or smooth margins. New leaves have fine red hairs on the underside of the leaf, whereas older leaves possess a gray color on the underside. Acorns have a wide, bulbous cap.

Close

Interior Live Oak

Interior live oak is found in forested areas throughout southern California. Interior live oak is an evergreen oak that can be tree or shrub form. Leaves are leathery, shiny, flat, and lack hairs on both surfaces. Stiff spines are found along the leaf margins. Bark is furrowed and gray when mature. Acorns possess a tapering tip and sit in a deep cup with thin and flat scales.

Close

Blue oak

Blue oak is a deciduous tree with a rounded crown. The bark is light gray in color and shallowly checkered. Leaves are dull green possessing few shallow lobes or entire margins. Acorns are oval-shaped, have a sharply pointed tip, and shallow, warty cups. Blue oak is found in northern Los Angeles and Kern county in southern California.

Close

Holly Oak

This is an evergreen species that is a common ornamental tree found throughout southern California. Bark is gray with checkered, scaly plates. Leaves are shiny dark green on the upper surface and pale green on the underside. Leaves can possess smooth margins or spiny margins. Acorns can be found on stalks with pointed tips and a deep cup.

Close

Cork Oak

Cork oak is a common ornamental tree species found in southern California. It is an evergreen tree with leaves that are shiny green on the upper surface and light green below. Leaf margins are mostly spiny. Bark is thick, furrowed, and very "corky." Outer bark can be easily chipped away. Acorns have a dimpled tip and the cup covers half the seed.

Close

Other Oak

Close

Healthy / Full

Minor-Thinning

Moderate-Thinning

Severe-Thinning

Flagging

Recently Dead

Resprouting

Leaf Feeding

Skeletonization

Discoloration / Mildew

Leaf Rolling / Tiering

Leaf Galls

Oak Mistletoe

Bark Bleeding / Oozing

Mushrooms at Base of Trunk

Charcoal Canker

Sloughing Bark

Carbon Balls

Decay Fungus Conk

Caterpillar Cocoons

Bark Flaking

Sapsucker Holes

Acorn Holes

Irregular Pattern on Wood (1/8 in.)

Irregular Pattern on Wood (1/4 in.)

Straight Lines Across Wood Grain

Irregular Damage to Outer Bark

Granular and Tightly Packed

Fibrous and Loosely Packed

Pellet-like in Outer Bark

White Powder on Outer Bark

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