How to Manage Pests

Pests in Gardens and Landscapes

Seasonal development and life cycle—Roundheaded borer

Adult females of most species of roundheaded borers lay eggs in bark crevices. The larvae bore beneath the bark and sometimes into the wood on tree limbs, trunks, and main roots. During the spring and summer the eucalyptus longhorned borer may complete its life cycle in 3 to 4 months, but in the fall and winter, it may require up to 9 months.

Mature eucalyputus
Mature eucalyptus longhorned borer larva

Statewide IPM Program, Agriculture and Natural Resources, University of California
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Agriculture and Natural Resources, University of California

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