The Oak Wilt Defense
The fall season is approaching, and cooler weather is hopefully just right around the corner. With changing temperatures, all our trees are going to be going through a change as well. As we enter the dormant season, we will be gifted with…
Lecanium Scale (Part One)
If “Lecanium” is a new word for you, consider yourself lucky, or at worst, blissfully ignorant. If you have experienced species of this genus in your landscape you may know how devastating, unsightly, and generally… uncomfortable this insect can be. If you have ever stood under a tree covered in a scale population which is actively feeding and digesting you will know why the word “uncomfortable” came to mind. In this installment I will briefly describe Lecanium scale and its life cycle. In the next installment, I will share an unusual finding from last season, and stand out on a limb to make a forecast for this season.
Putting the Year to Sleep
Today the light begins to increase again; days begin to lengthen. For the last 6 months or so each day has lost a minute or two of daylight, growing shorter as this part of the world approached the darkest day of the year. Earlier this week I was reading the musings of Henry David Thoreau once again, and came across a passage about the wonders of a milkweed seed, how each seed is carefully packed within its “light chest” attached to silk streamers, to be released when the time is right. Thoreau ends the thought with a quiet reflection on the faith of a milkweed plant which “matures its seeds” despite the prophecies of some men that the world would end.
Test Before Treatment: Soil & Tissue Testing
I find it interesting that test procedures recommended in the medical field for human health have become part of the expected methodology, but not so much in arboriculture, for tree health. As arborists, we are trained that a soil test should be done prior to recommending fertilization, for example, but I don’t know of many outfits that make soil sampling a part of their modus operandi.
The Importance of Green Leaves
I have been noticing what I consider to be an unacceptable amount of chlorosis in urban trees around Columbus. In general, chlorosis is the yellowing of plant foliage caused by a lack of chlorophyll. This is a problem because plants depend on chlorophyll to absorb energy from sunlight and to survive. Several…