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How to Manage Pests

The UC Guide to Healthy Lawns

Masked chafers (white grubs) — Life cycle

Adults emerge from the soil in the late spring to early summer and lay eggs in the root zone. Larvae emerge and go through 2 instars, feeding on roots. Larvae overwinter as third instar larvae and pupate in the spring. There is one generation per year.

Masked chafer pupal cast skin and new adult

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