Sticky Oaks

I recently came across a burr oak (Quercus macrocarpa) with leaves covered in clear, sticky honeydew. I could also feel fine droplets raining down as I stood beneath the canopy. Indeed, my camera lens collected so many tiny droplets I had to retreat to my car to clean it before taking more pictures.
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Authors
Joe Boggs

Dripping Calico Scale

Calico scale (Eulecanium cerasorum) is notorious for raining large quantities of sweet sticky honeydew onto the leaves and stems of its host tree as well as onto understory plants, sidewalks, parked cars, hapless gardeners, etc. A dingy patina is added when the honeydew becomes colonized by black sooty molds.
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Authors
Joe Boggs

Poison Hemlock and Wild Parsnip are Bolting and Blooming

Poison hemlock (Conium maculatum) is one of the deadliest plants in North America. Wild parsnip (Pastinaca sativa) sap can produce severe, painful skin blistering. Both are commonly found growing together in Ohio and both are beginning to bloom meaning the clock is quickly winding down for controlling these non-native nasties.
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Authors
Joe Boggs

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