By Linda Williams, DNR Forest Health Specialist, Woodruff, Linda.Williams@wisconsin.gov or 920-360-0665.
Two very different insects are creating holes in oak leaves this spring, the oak shothole leafminer and the spiny oak sawfly.
Oak shothole leafminer
In 2019 and 2020, many eastern U.S. states noted damage from this insect. While this is mostly a cosmetic issue for the tree, it can cause concern for homeowners and landowners when it appears that their trees are defoliated. The good news is that this damage rarely has an impact on the health of larger trees.
Small holes in the leaf, often with similar holes on the both sides of the main vein, indicate damage from oak shothole leafminer adults.
Continue reading “Oak Shot Hole Leafminer And Spiny Oak Sawfly”
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