Impervious Surface Thresholds and the Pace to Plant Technique for Planting Urban Red Maple Trees

A foundation of integrated pest management (IPM) in urban landscapes is to put the right plant in the right place. This preventive tactic can reduce plant stress, pest infestations, and subsequent pesticide applications. Many urban tree species have more insect and mite pests in urban landscapes than in surrounding natural areas. This is due in part to stress created by impervious surfaces like roads and sidewalks that make the air hot and the soil dry. For red maples (Acer rubrum), more impervious surface area adds stress and worsens tree condition. This 4-page publication written by Adam G. Dale, Steven D. Frank, Elsa Youngsteadt, Barbara Fair, Julieta Sherk, and Michael Just and published by the UF/IFAS Department of Entomology and Nematology focuses on selecting red maple planting sites that will help reduce tree stress and scale insect pests by maximizing surfaces permeable to water.

Seiridium Canker of Leyland Cypress (FOR279/FR341)

Seiridium canker, or Cypress canker, was first reported in California in the late 1920s and has since spread throughout North America and into Florida wherever Cupressaceae (cypress family) grow. Leyland cypress can be killed or severely disfigured by the disease. This 4-page fact sheet describes the causal agent, host range, symptoms and signs, disease cycle and management, and recommends tree replacements with resistance to Seiridium canker. Written by Jason A. Smith, and published by the UF Department of School of Forest Resources and Conservation, November 2010.

FOR274/FR336 Oak Wilt: A Potential Future Threat to Oaks in Florida

FOR274, a 5-page fact sheet by Kelly Peacock and Jason Smith, provides information on the diagnosis, biology, and management of the disease and should provide guidance for future efforts to identify and manage oak wilt in the state of Florida. Includes references. Published by the UF Department of School of Forest Resources and Conservation, November 2010.