Technical reports

  • All 320
  • Environmental factors and damage 50
  • Fertilization and soil management 34
  • General information 106
  • Insects and pests 82
  • Plant health care 91
  • Tree diseases 81
  • Tree management and consulting 15

Learn how i-Tree® tools help homeowners estimate and visualize the environmental benefits their trees provide. A practic…

Vent installation

Canada, Great Britain, Ireland, United States

A vent system through asphalt is a technique we have used with success in San Antonio, Texas. The system can be insta…

Verticillium wilt is a vascular disease that affects many woody trees and shrubs, herbaceous ornamentals, weeds, vege…

Verticillium wilt resistant species

Canada, Great Britain, Ireland, United States

Verticillium wilt is a soil borne fungal disease that can be fatal to a wide range of woody plants. It is also a sign…

Viburnum leaf beetle

Canada, Great Britain, Ireland, United States

The viburnum leaf beetle (VLB) is an exotic invasive pest of viburnum species. Both larvae and adults feed on viburnu…

Vista pruning

Canada, Great Britain, Ireland, United States

Trees contribute many benefits to a property including providing shade, reducing erosion, and maintaining privacy. Howev…

Voles

Canada, United States

Voles are small mammals that are commonly confused with other rodents such as mice, moles and shrews. They are widely…

Wax scales

Canada, Great Britain, Ireland, United States

Wax scales (Ceroplastes spp.) are soft scale insects that are perennial pests of several species of ornament…

Weir's cushion rust of spruce

Canada, United States

Weir’s cushion rust of spruce, also called spruce needle rust, is caused by the fungus Chrysomyxa weirii. This …

Scales are insects that use their needle-like mouthparts to pierce their host and draw food from nutrient-rich tissue…