This disease can also infect stems, resulting in tip dieback. A leaf spot on an English ivy. Start by removing infected leaves and stems, if possible, to slow the spread of the disease.

Poison ivy, Rhus radicans or Toxicodendron radicans, is an undeniable plant menace in home landscapes. I’m allergic to its plant oils, as you may be. It’s the plant we all love to hate. Purdue experts ...

A few years ago I was leading a group of Merrimack College ecology students on a nature walk, when one of them pointed to a vine with five leaflets per leaf, and asked if it was poison ivy. “No ...

Poison ivy was found to have high variation across America. However, a small but noticeable uptick in leaf serration was discovered in samples taken from further west. To further explore these ...

The key identification characteristic of poison ivy is the leaf. Poison ivy has a compound leaf made up of three leaflets which can be 1 to 4 inches long.