Woolly Aphids Add Interest to American Elms

The reemergence and wide use of American elms (Ulmus americana) in Ohio landscapes means we’re becoming reacquainted with some old woolly pests. Today, the point was driven home when I found both woolly elm aphids (Eriosoma americanum) and woolly apple aphids (E. lanigerum) on ‘Princeton’ elms in a landscape in southwest Ohio. Both are native insects that appear in pest records dating back to when American elms were "America's Street Tree."
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Authors
Joe Boggs

Horns are Popping

The “horns” that give the horned oak gall its common name are rising to the surface in southwest Ohio. The woody stem galls were formed under the direction of the gall-wasp, Callirhytis cornigera (Family Cynipidae) to feed and house immature grub-like wasps.
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Authors
Joe Boggs

Hemlock Woolly Adelgid - A 2021 Update.

Since November of 2020, there have been a number of new infestations of hemlock woolly adelgid (HWA) discovered in Ohio. These discoveries have been made in Mahoning, Summit, Jefferson, and Columbiana counties. This brings the total amount of known HWA-infested counties in Ohio to 16. The question for the homeowner and/or landscaper is: What should I do? The short answer is: Report it!
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Authors
Thomas deHaas

Periodical Update: Cicada Observations and Educational Opportunities

The anticipated magical appearance of Brood X (10) of the 17-year periodical cicadas (Magicicada spp.) is getting closer with each day. On one hand, the cicadas are providing clear evidence they are nearly reading take the stage en masse. On the other hand, progress has slowed to glacial speed owing to continual dips in springtime temperatures.
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Authors
Joe Boggs