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Grass-grub adults

Typical grass-grub damage

Large scale grass-grub damage

Grass-grub larvae in the soil

3rd (large) and 2nd (small) instar grass-grub larvae

Grass-grub - 3rd instar larvae

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Grass-grub, brown beetle

Scientific name: Costelytra zealandica

Further information

Grass Grub and Porina in Otago and Southland. A guide to management and control. BIP Barratt, van Toor RF, Ferguson CM and Stewart KM. 1990

Information prepared by AgResearch