It is a much larger beetle and its flight holes are larger, up to 7mm, and more oval in shape. Apply at any time of year. Female beetles lay eggs in cracks, crevices, end-grain timbers, or old borer holes. As New Zealand houses get older the damage to timbers accumulates and attacked timbers become progressively weaker. House borers (Anobium punctatum), only 3–4 millimetres long, were introduced from Europe. Scion is the leading provider of forest-related knowledge in New Zealand Formerly known as the Forest Research Institute, Scion has been a leader in research relating to forest health for over 50 years. Follow this guide and use the recommended products and we guarantee you will be successful in eliminating tree borers from your property. The grubs grow, and they grow as big as this one. Lemon-tree borer. Here's one of the grubs of the lemon tree borer. Tree Borer Control: How to Get Rid of Tree Borers. The Two Toothed Longhorn borer is a native to New Zealand and also common. House borer (both Anobium punctatum and the native Leanobium flavomaculatum) is a pest of major economic importance in New Zealand, the significance of which is not yet adequately recognised. This type of borer is less likely to be found in buildings. By the way, the lemon tree borer's a native of NZ, and it lays eggs in elm trees, citrus trees — you name it. Borer Types of borer There are two types of borer – the common house borer and the much rarer two-tooth long-horn borer. Citrus Tree Borer – inject directly into the holes in the trunk and branches. The easiest way to identify which one is affecting timber is to look at the holes they leave: the common house borer leaves a small round hole, the two-tooth long-horn borer an … People with old wooden houses and furniture know them all too well. This page is an expert guide on getting rid of tree borer infestations using the products and methods suggested by our experienced pest control specialists. The Rotorua-based Crown Research Institute continues to provide science that will protect all forests from damage caused by insect pests, pathogens and weeds. Trees that are riddled with borer holes are past the point of saving. Common borer females lay up to 100 eggs on the surface of bare timber or in old borer holes. I would try to get rid of citrus tree borer by following these steps: Lemon or citrus tree borer open holes through the bark of trunks and branches to get rid of their waste and it is through these holes that NO BORER INJECTOR fluid from Kiwicare can be injected to kill the larvae and prevent adults laying viable eggs in the holes. There are up to seven species of wood-boring insect in New Zealand that might attack the timbers of your home or other buildings. Effectively controls the Lemon Tree Borer. Anything can be affected, as long as the wood is alive. Adding mulch around your tree and providing it with supplemental water and fertilizer will help it fight off borers and heal from previous damage.. Chemical Control of Borers. The most common of these is the common house borer (Anobium punctatum) also known as woodworm in other parts of the world. Now, out of these eggs come little grubs that tunnel into the wood. Lemon Tree Borer Oemona hirta.Image: Phil Bendle Collection, Lemon tree borer Oemona hirta.Image: Shaun Lee / CC-BY-4.0 Lemon tree borer / Te kaiwiri rākau rēmana Borer life-cycle.