Be able to identify your trees also, this will go a long way in determining which beetle you are looking at. Borer damage also provides an opening for infection by heart rot fungus (Fomes rimosus). Adult locust borer and damage caused by the tunneling of the locust borer grub. Locust Borer Another thing I noticed about my purple robe black locust tree is it had a rather large bulge at the top of the trunk where the branches begin to come out. Megacyllene robiniae, commonly known as the locust borer, is a species of longhorn beetle endemic to eastern North America. are all no doubt affected by soil type, drainage, soil organic matter and soil pH. Adults are about one-inch long with reddish legs, and feed a little on the pollen and nectar of goldenrod plants, upon which they are well camouflaged courtesy of the yellow and black bars they possess on their head, pronotum, and elytra (there is a distinctive “W” mark across their elytra/wing coverings). Locust Borer. Larvae tunnel into a tree’s trunk and branches, weakening the tree and making it susceptible to wind breakage. The degree of damage varies in different locations according to tree vigor and the influence of environmental factors such as light, temperature, drought, fire, grazing. Overall tree … For the past 35 years, starting in Salt Lake City, locust borer has spread and damaged black locust in most of the counties of the Wasatch Front and northern Utah. Native geographic location and habitat. The leaf miner attacks the tree in spring, turning the leaves brown by mid-summer or early fall. Borer damage can severely affect the quality of lumber and can make trees susceptible to disease. LOCUST BORER, Megacyllene robiniae (Forster) Importance. The borer emerges from the twig through a small exit hole usually between two thorns. Management: Vigorous trees over 10 years old are seldom killed. Beetles fly and lay eggs in early fall (Figure 3). That is a result of scaring due to the damage going on inside. Larval mines can literally “honeycomb” both sapwood and heartwood, weakening the tree and making it subject to windthrow. Locust Borer Damage. Wood-boring Insects Long-horned beetles or round-headed borers (Coleoptera: Cerambycidae) Adults are called long-horned beetles (Fig. The adult is a brown moth with wingspread of 3/4". - This is the most serious insect pest of black locust. Proper watering, tree care and, in particular, wound prevention are the most important techniques for reducing problems with honeylocust borers. of locust borer damage, although weakened limbs may break in strong winds. Locust borer damage. This tree can sucker to the point of forming colonies. However there are a few species, such as poplar borer in aspen and locust borer in black locust, which can seriously damage live trees. Adults of this longhorned beetle are approximately 18 mm long and - The adult is an attractive longhorned beetle, If one is interested in starting a black locust plantation for … The only host is black locust. The larva of this insect tunnels in the small twigs of black locust, causing irregular swellings from 1 to 3" long. Honeylocust borer damage (Ryan Davis, Utah State University Extension) Pest Description adults: 1/4 – 3/4 inch; slender, black with greenish-purple reflections The honeylocust borer develops underneath the bark. The wood is weak and brittle, subject to storm damage. Black locust is susceptible to some damage from two native insects, the locust borer (Megacyllene robiniae) and the locust leafminer (Odontota dorsalis). I thought the fight was over with defending my Twisty Baby Locust tree when I no longer found anymore Sap Beetles crawling around the trunk chewing holes. Hey folks, I was looking over some of the timber in my backyard last night and I heard some rustling so I got a closer look thinking it might just be a garder snake in the leaves but it turns out that I have some Locust Borer Beetles. Larvae develop within trunks, causing deep tunneling that may riddle the plant and produce serious structural weakening. Locust twig borer, Ecdytolopha insiticiana. Native to eastern and southern parts of the United States. It is a serious pest of Robinia pseudoacacia , the black locust … If you ever have any bug related questions feel free to call us either at Beyond Pest Control. Share your thoughts, experiences and the tales behind the art. Honey locusts or other trees are not affected by this species, whose only host is the black locust. The locust borer has larvae that can attack black locust trees and the adults are commonly seen on goldenrod in September until the first killing frost hits. 3) found on the trees and on the flow- ers of golden-rod from August to Octo- ber. EMBED (for wordpress.com hosted blogs and archive.org item tags) Want more? The locust borer is monophagous, capable of developing on only one host, the black locust tree. Severe growing stresses, trunk wounds and/or canker growths are essential for its development; management should focus on correcting these factors. The locust borer (Megacyllene robiniae) is a serious pest of black locust (Robinia pseudoacacia). Tunneling by locust borer larvae weakens tree limbs, making them susceptible to breakage by wind and ice. Share your thoughts, experiences and the tales behind the art. Honeylocust borer is a flatheaded (metallic) beetle related to the pacific flatheaded borer, bronze birch borer, and emerald ash borer (which is not in Utah). Trees may respond to tunneling in the trunk with faster growth in those damaged areas, resulting in the formation of knotty swellings. controlling locust borers. 1), which hatches from an egg (fig. Then these gals came, Locust … The locust borer, Megacyllene robiniae Forster inflicts severe damage upon its host, the black locust tree, Robinia pseudoacacia L. Damage is encountered as the larva develops, tunneling first in sapwood and then in heartwood, in the host. Other symptoms include several broken branches, thinness in the top part of the tree, exit holes in the bark, and sawdust at the base of the trunk. Black locust is resistant to black walnut toxicity. EMBED. Megacyllene robiniae. It’s a native insect and was first found in the eastern part of the United States in natural stands of black locust trees. Locust Borers are associated with the Black Locust and its cultivars, the Hickory Borer is associated with Hickory and Pecan Trees. Identifying the Insect. M. R. 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