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

Periodical cicadas

Canada, United States

Periodical cicadas, or the so-called seventeen-year locust, are native to the eastern half of North America and exist…

Pests of pines

Canada, United States

All species of pines are attacked by insects known as bark- and wood-boring beetles. As a group, these insects are hi…

Phytophthora canker

Canada, United States

Many Phytophthora species attack shade trees and landscape ornamentals causing root and root collar disease,…

Phytophthora root disease is a widespread but often overlooked disease of landscape plants. There are many s…

Phytophthora root disease is a widespread but often overlooked disease of landscape plants. The name, Ph…

Pieris, formerly named andromeda, is an evergreen shrub group with year-round appeal. The most common species is Japa…

Pin oak (Quercus palustris) is a fast-growing, large-maturing shade tree with a pleasing oval-pyramidal…

Pine bark adelgid

United States

Pine bark adelgid, Pineus strobi, infests pines in the eastern half of the US and may cause injury to young …

Pinewood nematode

Canada, United States

The pinewood nematode (Bursaphelenchus xylophilus) is the most destructive pest of forest and landscape pine…

Pitch pine canker

United States

Pine pitch canker (PPC) is a disease caused by the fungus Fusarium circinatum. It occurs most frequently in the south…