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Selected New and Updated EDIS Documents
EDIS is the Electronic Data Information Source of UF/IFAS Extension.
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.
How to Calibrate Your Fertilizer Spreader
Fertilizer application is only effective if you ensure uniform coverage. This 5-page document discusses the calibration and use of fertilizer spreaders for successful application. Written by T.W. Shaddox, J.B. Unruh, and L.E. Trenholm and published by the UF/IFAS Environmental Horticulture Department, November 2017.
Biscogniauxia (Hypoxylon) Canker or Dieback in Trees
Biscogniauxia canker or dieback is a common contributor to poor health and decay in a wide range of tree species growing in many different habitats, such as forests, parks, green spaces, and urban areas, in Florida. This disease is caused by several species of fungi in the genus Biscogniauxia (formerly Hypoxylon). These pathogens do not typically harm healthy and vigorous trees, but once they infect trees under stress from drought, root disease, soil compaction, construction damage or other causes, they can quickly colonize the tree. Once a tree is infected and fruiting structures of the fungus are evident, the tree is not likely to survive, especially if the infection is in the trunk. This 3-page fact sheet written by Claudia Paez and Jason Smith and published by the UF/IFAS School of Forest Resources and Conservation explains the pathogen’s biology and lists signs and symptoms as well as control measures and ways to keep trees healthy to resist infection.