Branch dieback in spruce can have many causes such as the generalized dieback we see as roots fail from root rot or various root injuries. Cytospora canker is a very well-known disease of spruce, particularly blue spruce (Picea pungens). A dead branch in a spruce is often attributed to Cytospora but that is not always the case as was evident in a recent blue spruce sample.

Look closely at the dying branch. Trace the dead and dying tissue back to where it transitions to healthy. Carefully scrape the bark at that transition looking for discoloration of the...

Non-native Invasive species issues are commanding a lot of natural resource professional's attention these days. Whether it concerns insects, diseases, plants, mammals or aquatic species there is something out there for everyone! One thing that is true across the board is that early detection is key to dealing more effectively with all of these.

As a group of Extension professionals were discussing our new Asian longhorned beetle infestation in 2011 we kept coming back to how do we get these things reported early when they are still on a relatively small scale. We were...

Ever wonder why when passing a Silver Maple (Acer saccharinum) in flower, one week the blooms appear to be a green-yellowish cast and then suddenly, a little while later, the blooms appear to have turned red?  Then the questions begin like, did I misidentify the tree or did I really see light yellow blooms on the branches?  First and foremost, you are not going crazy, and in the case of the silver maple, it is perfectly normal to see both colors of blooms!  According to Micheal A. Dirr's Manual of Woody Landscape Plants, silver maple blooms are described as follows: "...

The accumulated Growing Degree Days (GDD) that predicts eastern tent caterpillar (ETC) (Malacosoma americanum) egg hatch is 92.  Cincinnati has reached 89 GDD meaning that ETC eggs are poised to begin hatching in southwest Ohio.  ETC spends the winter in shiny, blackish-brown egg masses wrapped around twigs on their host plants.  A close examination will reveal that the eggs are encased in a structure that resembles bubble-wrap.

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Last week, Master Gardener Volunteer (MGV) Interns from Lucas County held their weekly class at the Robert Anderson Urban Agriculture Center in Toledo, Ohio.  The Center is home to Toledo GROWs - Gardens Revitalize Our World, the community garden outreach of the Toledo Botanical Garden.  In addition to spending time in the classroom, MGVs also were able to tour the Center that included seeing the farm stand, greenhouses, bee hives, chickens, and outdoor growing areas. 

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A book review recommendation for all is a wondrous book by Andrea Wulf, titled The Invention of Nature: Alexander Von Humboldt’s New World.    

How is this for reviews of this life: “One of the great ornaments of his age.” from Thomas Jefferson.

“Nothing ever stimulated my zeal so much as reading ‘Humboldt’s Personal Narrative” from Charles Darwin, and according to Andrea Wulf “…saying he would not have boarded the Beagle, nor conceived of the “Origin of Species” without Humboldt.”

Quoting from Wulf...

As I was walking into one of the offices on The Ohio State University Campus this morning, a small grey-colored moth caught my eye.  Upon closer inspection it was a male of the spring cankerworm, Paleacrita vernata (Lepidoptera, Geometridae)!  After my meeting I walked around the building and quickly spotted one of the females, also on a wall. The females are unusual in that they have no wings.  They look like little fuzzballs!  The females release a pheromone which attracts males for mating.  Soon after mating, the females attach eggs, usually onto potential host trees, mainly...

A good sample is critical for successful diagnosis.  Recently, seedlings were received at OSU’s C. Wayne Ellett Plant and Pest Diagnostic Clinic.  Diagnosticians often examine poorly packaged samples which arrive in poor condition. 

Seedling samples are challenging to package and ship; they deteriorate rapidly.  Send the entire tray if they are being produced as plugs or cut out a portion of the tray to allow samples to arrive in the best condition.  If plugs are being removed from the tray wrap the roots and associated media in foil or plastic wrap to keep the media on the roots...

Now that winter seems to have finally arrived, we will soon be seeing some harbingers of spring; the nodding flowers of hellebores.  There are approximately 15 species within the Helleborus genus.  The most commonly found are Helleborus niger (Christmas rose) and Helleborus orientalis (Lenten rose), most cultivars found in stores are hybrids of Helleborus orientalis and are listed as Helleborus x hybridus.  Despite its common name it is not closely related to the rose family.

In spite of its beauty and other attractive...

The skunk mating season is underway (mid-February – April), and homeowners may see an increase of skunks this time of year, or rather smell an increase in skunks! Male skunks are polygamous and right now are traveling far and wide in search of females, which accounts for the increase in sightings and smellings this time of year. During these travels and times of increased activity, skunks are more likely to encounter threats, and therefore spray. Skunks spray for the primary reason of defense from a perceived threat. That threat could be a human, pet, or another wild animal....