Manage Disease. Larvae are creamy white in color and have large circular heads and reach one and a half inches in length. Phoracantha recurva is a large, tree-boring insect that belongs to the long-horned timber beetle family (Cerambycidae). in a native eucalypt forest where outbreak densities of a native Australian beetle, the eucalyptus longhorned borer (Phoracantha semipunctata), occurred, a tree dissection study was conducted in Australia. Bio Advanced 12 Month Tree and Shrub Protect and Feed II Concent. Put the feeder in the ground a few feet from the trunk to be the most effective. Products labeled to treat Eucalyptus Longhorned Borers; Bonide Rose RX Systemic Drench Concentrate. Biological Control, 19(2):95-104; 36 … Their larvae are the Eucalyptus wood borers which damage the timber. Ferti-lome Tree and Shrub Systemic Insect Granular. The adult beetles feed primarily on the Eucalyptus pollen, whereas the larvae bore within the trunks of the plant. So far, only the second of these two beetle species, Phoracantha recurva, has been found . This insecticide is injected directly into the tree’s vascular system and is released quickly to help kill insects already inside the vascular system. Generally, the bugs leave trees that are well watered alone. For example, during the spring and summer eucalyptus longhorned borers may complete their life cycle in 3 to 4 months; eggs laid during the fall and winter may require up to 9 months to develop into adults. While generally hardy, eucalyptus does have a few pests, such as the notorious longhorned borers, which leave trails across the surface of bark and cause it to peel and bleed. A good way to do this is to use a hose root feeder especially during droughts and dry seasons. This involved felling 40 trees each of jarrah (Eucalyptus marginata) and marri (Corymbia Suitability of the eggs of two species of eucalyptus longhorned borers (Phoracantha recurva and P. semipunctata) as hosts for the encyrtid parasitoid Avetianella longoi. Phoracantha semipunctata, the Australian Eucalyptus longhorn, is a species of beetle in the family Cerambycidae, its common name is the eucalyptus longhorned borer. The Eucalyptus longhorned borer is the most commonly observed pest as it likes to lay its eggs just underneath the surface of the wood. Native species of roundheaded borers attack mostly damaged or dying plants; vigorous trees are rarely attacked. Damage. Eucalyptus Longhorned Borers Recommended Steps to Control Eucalyptus Long-horned Borers. Adults are blackish-brown beetles up to an inch in length. Larval galleries under the bark of Eucalyptus Once an adult emerges from overwintering, they seek out freshly cut or stressed trees to lay their eggs. The best way to control Longhorned Eucalyptus borers is to keep trees healthy and well watered. If caught early enough, immediately apply Multi-Insect Killer Tree Injection Kit to the tree. Native to Australia, it has now spread to many parts of the world, including practically all countries where tree species of Eucalyptus have been introduced. Learn how to control Eucalyptus Longhorned Borers with these easy to use products! The most obvious indication of the borer is the presence of the adult or larval stage of the insect. The larval form of the insect can create tunneling damage in your furniture. This Common Eucalypt Longicorn Beetle became the pest in wood plantation industry too. As the Australia native Eucalyptus trees become the major plants in plantations through out the world. Eucalyptus longhorned borers (ELB) are two species of bark beetles that were first introduced into California in the 1980's and around 1995 respectively. 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