Two-Lined Chestnut Borer


The Great Lakes Bay Region is blessed with many large, beautiful oak trees, many of which are over 150 years old and were spared from the area’s heavy timbering of the 1850s. However, the two-lined chestnut borer has recently appeared in several areas of the region, particularly in parts of Midland, damaging and killing large oak trees. The word “chestnut” refers to the beetle’s past status as a principal pest of American chestnut. Oaks are currently the primary hosts for this pest.

Garpiel Group has options available to treat and prevent two-lined chestnut borers from affecting oak trees. The first option involves a deep-root fertilizer, mixed with imidacloprid injected into the ground and taken up to the tree through the roots system. This method promotes new growth and increases the health of the tree with fertilization, while the imidacloprid spreads throughout the tree and controls any chestnut borer that may try to invade it. This treatment also controls several types of scales that drip honey dew from the tree. The second treatment option is a chemical trunk injection that controls the borer and protects for two years, similar to the emerald ash borer treatment process.