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Problems involving trees, shrubs, and ground covers

Photo courtesy of Clark.

Symptoms: Damages on conifer needles.

Diagnosis: Toxicity from ozone.

Solutions: Reduce ozone pollution, if possible.

Photo courtesy of Clark.

Symptoms: Necrotic spotting on maple leaves.

Diagnosis: Ozone toxicity.

Solutions: Reduce ozone pollution, if possible.

Photo courtesy of Larry Costello.

Symptoms: Severely injured Canary Island pine.

Diagnosis: This damage was caused by gases released from a leak in a nearby buried gas line.

Solutions: Avoid deep-rooted plantings over or near underground utility lines.