Tree Diseases: Holly Leaf Spot

Introduction Holly leaf spot, also referred to as holly tar spot, is a fungal disease that affects holly plants. Holly tar spot induces the formation…

Insect Profiles: Red Pine Scale

Introduction Red pine scale is a small exotic insect that infests several species of pine. The insect’s preferred host is red pine. Red pine scale…

Disease Profiles: Maple Tar Spot

Introduction Maple tar spot is a fungal disease that affects many species of maple. The disease occurs most frequently in North America and Europe. It…

Insect Profiles: Ailanthus Webworm

Introduction Ailanthus webworm is an ermine moth commonly found throughout the United States. The insect originated in South Florida and the American tropics, where it…

Tree Diseases: Oak Wilt

Introduction Oak wilt is an aggressive tree disease that affects many species of oak. The causal agent of oak wilt is the fungus Ceratocytis fagacearum.…

Tree Diseases: Armillaria Root Rot

Introduction Armillaria root rot, also called fungal root rot, or Armillaria root disease, is a plant disease caused by several members of the genus Armillaria.…