New OSU FactSheet on Hydrangeas

There seems to be a growing interest in hydrangeas. Along with the new or renewed interest in this genus, there are some common questions about plant selection, pruning and care. Eric Barrett, Extension Educator in Mahoning County, recently authored an OSU FactSheet HYG 1263, Selecting Hydrangeas for the Home Landscape to help gardeners understand this group of plants in the genus Hydrangea. 
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Authors
Amy Stone

The Twisted Story of Rose Rosette Disease

I came across several multiflora roses while walking in a county park last Friday that were being hammered by Rose Rosette Disease (RRD). It was a reminder that this non-native invasive rose serves as a significant source of the rose rosette virus that is responsible for producing Rose Rosette Disease (RRD), as well as the eriophyid mite that is responsible for spreading the virus.
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Authors
Joe Boggs
Jim Chatfield
Love Thou the Rose, Don't Leave Galls on its Stem boggs.47 Thu, 07/26/2018 - 17:12
The English novelist, Edward G. Bulwer-Lytton, actually said, "Love thou the rose, yet leave it on its stem." I adjusted his quote to illustrate how to control bizarre looking mossy rose galls. The hairy-looking galls are produced under the direction of a gall-wasp.  Ridding roses of the galls rids them of the wasp.
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Joe Boggs

Ohio Christmas Tree Association (OCTA) at the Ohio State Fair

Earlier this week, a team from OSU Extension judged Christmas trees at the 2018 Ohio State Fair. All the trees were grown in Ohio. Trees were judged on shape, fullness, color and overall appearance. Trees needed to be between 6 and 8 feet tall, have a handle between 6 and 12 inches, and have a correct range of taper based on the species.
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Amy Stone

The Clock is Ticking on White Pine Weevil Control

I received an e-mail message today from an arborist in southwest Ohio who included images that showed damage caused by White Pine Weevil. Main shoots (terminal leaders) on white pine and Norway spruce were wilted and brown. Some of the shoot tips were curved into "shepherd’s crooks;" the curling occurs when tender new shoots dehydrate while they are still pliable.
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Joe Boggs

Tale of Two Crabapples: Diagnostics Is Never Easy

Summertime: And Diagnosis is never easy.  Even with something as dear to my pathological brain as apple scab and cedar-apple (or hawthorn) rust on crabapple. I was on a walkabout at a northeast Ohio commercial landscape two weeks ago and came upon side-by-side crabapples – and the different symptoms of these two diseases on crabapple.

 

On one crabapple, apple scab infections caused some affected leaves to turn yellow before dropping; on the other crabapple the leaves turned orangish-red (the cover photo). As for rust, the lesions on the upper leaf surfaces of one crabapple...

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Authors
Jim Chatfield
Joe Boggs

Gypsy Moth - The Next Generation

Adult gypsy moths are active in NW Ohio. The males are brown to tan in color, fly during the day in a zig zag pattern and have feather-like antenna. The females are white and do not fly. The male moths seek out the females, they mate and she lays an egg mass that can contain up to 500 eggs. It is those eggs that will produce the next generation.
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Authors
Amy Stone

Yellow Poplar Weevil Reared its Snout in Central Ohio

We held our OSU Extension Nursery, Landscape, and Turf Team (ENLTT) meeting yesterday at Dawes Arboretum. Among the beautiful landscapes and impressive collections was clear evidence that Yellow Poplar Weevils had made a return appearance in central Ohio. The adults feed on leaves and the larvae feed within leaves as leafminers.
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Authors
Joe Boggs