Most borer damage in New Zealand is caused by either house borer or the native two toothed longhorn while the larger borer (Native) will only attack already rotting timber. House and Two tooth borers will attack individual pieces of furniture as well as timber in houses.

The house borer adults emerge in October - January, though mainly in December, leaving small exit holes. Each female deposit 20 white eggs on or near the surface of timber in cracks, crevices, joins or rough sawn timber. Soon after hatching the larvae eat their way into the wood and can spend the next 2-5 years tunnelling in the wood. The life cycle is governed by moisture, temperature and type of wood.

Two toothed longhorn are active from February to late June. The white elongate larvae burrow along the grain and make a much larger tunnel than either house or large borers.

Thermal Fogging

General Spray