Croesus latitarsus

Bothersome Birch Blighters

Dave Bienemann, Municipal Arborist/Utility Forester, City of Hamilton, alerted me to two pests appearing on river birch (Betula nigra) in southwest Ohio. Dusky Birch Sawfly (Croesus latitarsus) larvae are munching on the leaves while Spiny Witchhazel Aphids (Hamamelistes spinosus) are producing raised ribs or "corrugations" on the upper leaf surface.
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Joe Boggs