Generally, the bugs leave trees that are well watered alone. Manage Disease. 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. Once an adult emerges from overwintering, they seek out freshly cut or stressed trees to lay their eggs. 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. Eucalyptus longhorned borers (ELB) are two species of bark beetles that were first introduced into California in the 1980's and around 1995 respectively. Put the feeder in the ground a few feet from the trunk to be the most effective. This insecticide is injected directly into the tree’s vascular system and is released quickly to help kill insects already inside the vascular system. Ferti-lome Tree and Shrub Systemic Insect Granular. Eucalyptus Longhorned Borers Recommended Steps to Control Eucalyptus Long-horned Borers. The larval form of the insect can create tunneling damage in your furniture. So far, only the second of these two beetle species, Phoracantha recurva, has been found . Native species of roundheaded borers attack mostly damaged or dying plants; vigorous trees are rarely attacked. Suitability of the eggs of two species of eucalyptus longhorned borers (Phoracantha recurva and P. semipunctata) as hosts for the encyrtid parasitoid Avetianella longoi. If caught early enough, immediately apply Multi-Insect Killer Tree Injection Kit to the tree. The best way to control Longhorned Eucalyptus borers is to keep trees healthy and well watered. Bio Advanced 12 Month Tree and Shrub Protect and Feed II Concent. This Common Eucalypt Longicorn Beetle became the pest in wood plantation industry too. Damage. Larvae are creamy white in color and have large circular heads and reach one and a half inches in length. Biological Control, 19(2):95-104; 36 … The most obvious indication of the borer is the presence of the adult or larval stage of the insect. The Eucalyptus longhorned borer is the most commonly observed pest as it likes to lay its eggs just underneath the surface of the wood. Adults are blackish-brown beetles up to an inch in length. A good way to do this is to use a hose root feeder especially during droughts and dry seasons. Larval galleries under the bark of Eucalyptus Phoracantha recurva is a large, tree-boring insect that belongs to the long-horned timber beetle family (Cerambycidae). Phoracantha semipunctata, the Australian Eucalyptus longhorn, is a species of beetle in the family Cerambycidae, its common name is the eucalyptus longhorned borer. As the Australia native Eucalyptus trees become the major plants in plantations through out the world. 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