USDA Hardiness Zones – Selection aid to identify plants adapted to existing environmental conditions.
Oregon State University: Pruning Basics – Helpful resource for how to prune trees and why tree sanitation is necessary.
Iowa State University. (2010). Plant and Insect Diagnostic Clinic – Encyclopedia of common plant diseases.
Maine Department of Agriculture, Conservation and Forestry. School IPM – Collection of IPM guides and checklists.
Umass Turf Extension Center – Best management practices for lawn and landscape turf.
University of California Agricultural and Natural Resources. (2009). How to Manage Pests – University of California’s official guidelines for pest monitoring techniques, pesticides, and nonpesticide alternatives for managing pests in agriculture, floriculture, and commercial turf.
University of Georgia Center for Invasive Species and Ecosystem Health – Collection of images useful for identifying and diagnosing common pests and pathogens.
Michigan State University – Diagnosis and treatment options for necrotic ring spot of turfgrass.