May 15, 2020

For the past two weeks my woods have been aglow with the bright white flowers of the blackhaw viburnum. (Viburnum prunifolium)

blackhaw at the woods edge

blackhaws in bloom in the understory

red admiral butterfly nectaring in blackhaw flowers

This shrub or small tree toler...

June 15, 2015

RIGHT NOW is the time of year that emerald ash borer (EAB) adults are active. Here are some photos I took last Wednesday in Willow Grove, Bucks County, PA.

This ash tree had some live branches on it a few weeks ago. Landscape maintenance people have cut and removed them...

May 28, 2014

Lots of local news coverage on the impending invasion of the emerald ash borer has many owners of ash trees alert for any unusual symptoms. So I was not surprised by the number of recent calls I’ve been getting about blighted ash leaves. Leaf drop in mid May is a commo...

January 30, 2014

An exciting opportunity presented itself to me through my membership on the Lower Frederick Township park board. In 2011 the board had been discussing uses for the one of the areas of vacant land that had been acquired using Montgomery County Open space funding.  “Cudd...

June 21, 2012

These pin oaks are shedding leaves, and large parts of some of them have leaves that look white from the ground.  The culprit is scarlet oak sawfly larvae.

I have never seen damage quite like this from this insect.  It’s unusual for it to reach such a high population th...

June 12, 2012

This weeping willow in Harleysville has adult imported willow leaf beetles feeding on its leaves. They won’t cause much damage. But the population of beetles is rather high, and they will soon lay eggs. When the larvae of the next generation emerge from the eggs, they...

June 8, 2012

The way this client found me is a little bit strange.  He found my website by googling “bacterial leaf scorch” (I have articles posted about my experiences with BLS).  That’s what another “arborist” told him was wrong with his ash tree.  And that the disease would kill...

May 9, 2012

Most of the ash trees in our area have been losing leaves in the past few days because the rainy weather is ideal for the ash anthracnose fungus disease.  Learn about ash anthracnose from this article in the Jacobs Tree Surgery blog:  DON’T PANIC!  Your ash tree is goi...

April 25, 2012

Today was the annual Arbor Day of Service for the Penn-Del chapter of ISA.  Arborists from many area companies came together to donate tree maintenance work at the Freedoms Foundation in Valley Forge.  Trees were pruned in the Medal of Honor grove, where our climbing c...

April 11, 2012

I was in Walmart recently, looking at the plants.  Ok, I suppose I’ve already turned off parts of my audience!  But seriously, looking at all those trees in 2-gallon pots, I couldn’t help feeling a little bit sad.  “Sad?”  You might think, “Why sad?  You love trees, an...