Making a correct tree identification is the critical first step in correctly diagnosing a tree problem. Of course, sometimes the diagnosis identifies the tree. Insect galls are often so host-specific, they can give you six-legs up on tree identification.

Ailanthus Webworm caterpillars feed exclusively on the non-native, highly invasive, misleadingly named Tree of Heaven. I came across a heavy webworm population this week while lumbering through a thick growth of tree of heaven saplings in search of Spotted Lanternfly.

Driving along in Northeast Ohio, I came around a bend in the road and saw some tall weeds with clusters of white flowers in the roadside ditch.  The flower heads had the classic shape of the Apiaceae or carrot family with the typical “compound umbels” on display.  Think of an upside down umbrella with all the flower clusters radiating upward from a single point end of the stalk to form a flattened flower head about 6-10” across.  So, I just had to stop and look at these plants knowing the concern that they will incite when people panic because they think they are seeing...

Spotted is native to Southeast Asia. It was first found in North America in eastern Pennsylvania in the fall of 2014. Reports at the time kept noting that Tree of Heaven is the primary host. Frankly, I thought: "Who cares?"

Last week, a local police officer was called out to a property for mysterious “bug” activity.  An unusual nest was reported on the property and the concerned homeowners did not know what it was or what to do with it.  Luckily, the officer knew to call their local Extension office and soon we were ON THE CASE!  (Here come the sleuthing puns!)

 

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Perennial plants (and others) are showing damage caused by four-lined plant bug (Poecilocapus lineatus) with some plants exhibiting heavy damage.  For instance, my oregano is totally obliterated.  I usually say no worries to this pest as it is a one and done insect; it has one life cycle in the early part of spring.  The damage is caused early enough in the season that I don't usually worry about taking action with pesticides.  However, this year is anything but normal and I am altering my normal approach a bit.

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Wild parsnip plants are rising towards their full height and their yellow blooms are beginning to open in southern Ohio. Landscape managers and gardeners should exercise extreme caution around this non-native invasive plant.

Poison hemlock is one of the most lethal plants found in North America. This biennial weed is now in full flower throughout much of Ohio. So, the clock is ticking on preventing seed production by this non-native invasive plant.

Julie Crook and I visited a magnolia in her landscape on Tuesday that is infested with Magnolia Scale. We had intended to evaluate a soft scale control method using dish scrubbers to physically remove the scales. I learned about this scale suppression technique from Dan Potter (University of Kentucky Entomology).

I'm continuing to get reports of huge numbers of tiny, fast-moving bright red mites scurrying around on sunny surfaces such as on picnic tables, patios, sidewalks, concrete retaining walls, and on the outside walls of homes and buildings. These nuisance mites are sometimes called "concrete mites" owing to locations where they tend to congregate