Tar spot is caused by a fungal infection. In spring, spores are released from the fungus. They become airborne in the wind, ...

Anthracnose is a common spring disease on maple trees. Several different fungi can cause the symptoms we describe as anthracnose.

All living things die, which is too often perceived as a negative phenomenon. Yet, forest mortality yields an opportunity for both change and rejuvenation. These dynamics are wonderful to witness, and ...

Have you ever wondered what those white pellets were in your potting soil? Well, it's more important than you may know.

Urban trees lining streets fare better in dry spells than those in parks – now it seems that leaky water pipes are the reason ...

A couple of recent, late June, incidents are reminders that gardeners need to be vigilant during the long, warm days of ...

Cankers are caused by a fungi or bacteria. Most pathogens are unable to penetrate bark directly, making vigorous, healthy trees better able to avoid them. Canker pathogens take advantage of ...