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

Conifer care

Canada, Great Britain, Ireland, United States

Conifers are commonly planted in North America to provide year-round screening, as windbreaks, or as focal trees in t…

Construction monitoring

Canada, United States

Learn how certified arborists monitor construction projects to ensure tree preservation guidelines are followed. This do…

Cottony camellia scale

Canada, Great Britain, Ireland, United States

Cottony camellia scale (Pulvinaria floccifera) (CCS), also known as cottony taxus scale, is a soft scale pes…

Crabapple diseases and pests

Canada, United States

Most crabapples are hardy in areas all along the eastern seaboard. In general, they are subject to the same diseases …

Crabapples (Malus sp.) are small, versatile trees popular in urban and suburban landscapes. More than 400 sp…

The crape myrtle bark scale (CMBS, Acanthococcus lagerstroemiae) is an exotic pest that causes damage to cra…

Crapemyrtle: Plant health care report

Crapemyrtles (Lagerstroemia) are ornamental shrubs and trees commonly planted in the southeastern United Sta…

Cynipid gall wasps on oak

Canada, Great Britain, Ireland, United States

Galls are formed when an external agent, such as an insect or fungi, causes plant tissue to swell. Galls can occur on…

Cytospora canker of spruce

Canada, Great Britain, Ireland, United States

Cytospora (Valsa) canker is the most destructive disease of spruce, and is most common on Colorado blue spruce and No…

Mature trees decline when their limited energy supply is diverted from storage and growth to surviving multiple stres…