Perennial of the Week - Prickly Pear Cactus

When we think of cactus we often think hot and dry, maybe somewhere like Arizona, but not necessarily the buckeye state. It is exciting to see people's reaction when they learn they can grow a cactus in Ohio and that it will winter over and return year after year. The prickly pear cactus (Opuntia humifusa) performs well in full sun and extremely well drained soils. Plant placement is very important as moist or wet soils can pose significant problems. In a year like we have been experiencing, even the most ideal spots could be a little troublesome in 2019 with all of the rain we have been...
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Amy Stone

ODNR Celebrates 40th Anniversary of Urban Forestry Assistance in Ohio

On Friday, June 21, 2019, the Ohio Department of Natural Resources (ODNR), Division of Forestry (DOF) celebrated the 40th Anniversary of their Urban Forestry Assistance Program at a Forum held at the Ohio Expo Center and State Fairgrounds. ODNR Director Mary Mertz welcomed the audience attending a program developed to celebrate the last 40 years, and look forward to the next 40+ years. 
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Amy Stone

Turfgrass Times, 06.21.2019

Here is your link to the weekly video update (recorded on 06.21.2019) from the OSU Turfgrass Team. Updates are from Dr. David Shetlar, aka The Bug Doc; Dr. David Gardner; Dr. Ed Nangle; Dr. Pamela Sherratt; Joe Rimelspach; and Dr. Zane Raudenbush.
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Amy Stone

White-Marked Tussock Moth Caterpillar Outbreaks

Heavy localized populations of white-marked tussock moth caterpillars are being reported in central and western Ohio. Curtis Young (OSU Extension, Van Wert County) showed images during this week's BYGL Zoom Inservice of caterpillars on a variety of hosts including rose and noted he had received reports of hot spots in Allen, Hancock, and Putnam Counties. I received a report from Franklin County of 100% defoliation of a landscape redbud.
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Joe Boggs

Blistered Oak Leaves

Oak leaf blister and oak leaf blister mites produce look-a-like symptoms early in the growing season. Light green to greenish-yellow irregularly-shaped bulging "blisters" rise from the upper leaf surface. An accurate diagnosis requires flipping the leaves over to look at the lower leaf surface.
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Joe Boggs

Poison Hemlock and Wild Parsnip are going to Seed in Southern Ohio

Poison hemlock and wild parsnip are two of our nastiest non-native weeds found in Ohio. Poison hemlock can kill you while wild parsnip may make you wish you were dead. Both are commonly found growing together and continuously wet conditions caused both to flourish this growing season. The size of some infestations has been remarkable. Poison hemlock produces white flowers on stalks that create a more rounded look; perhaps a bit more like an umbrella.  Wild parsnip has intense yellow flowers with the stalks producing a more flat-topped appearance.
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Joe Boggs
Erik Draper

Crabs, Scab and then So Sad... Drab!

On the BYGL conference call, I shared that I am amazed at how the foliage of the greatest landscape small tree, the breathtaking crabapple, has remained relatively clean here in NE Ohio.  I was expecting with all of the rain this year, that we would quickly see what we Crabarians affectionately term “year of the scab dog”.  This “scab dog” effect is due to the fungal pathogen (Venturia inaequalis) causing extensive apple scab lesions on susceptible crabapple tree leaves.  Given our perfect environmental conditions for this fungal disease, I expected it to quickly...

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Authors
Erik Draper
Joe Boggs