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

One method for discouraging deer browsing is to plant trees, shrubs and garden plants that deer don’t like to e…

Defoliation on shade trees

Canada, Great Britain, Ireland, United States

The plant leaf functions primarily in the manufacture of sugars and carbohydrates. These substances are the basic food o…

Determining change of lean

Canada, Great Britain, Ireland, United States

Trees that do not grow perfectly upright are often considered predisposed to failure. While not all leaning trees are at…

Phytophthora spp. is an aggressive plant pathogen that affects many landscape ornamental plants. In fact the word Phy…

Dieback and decline

Canada, United States

The term “dieback” technically refers to the progressive dying-back of shoots and branches from the tip d…

Diplodia tip blight is a devastating disease of two- and three-needle pines. It is caused by the fungus Sphaeropsis s…

Many hybrids and selections of Asiatic elm that have reliable resistance to Dutch elm disease (DED) are available for…

Palms are a very diverse group of plants, and landscape palms are susceptible to a variety of diseases.

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Dogwood anthracnose

Canada, United States

Anthracnose caused by the fungus Discula destructiva is a potentially fatal disease of dogwood. All varieties of the …

Dogwood borer

Canada, United States

Dogwood borer (Synanthedon scitula) is a native pest of eastern North America. This pest is a type of clearwing moth …