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Plant health care

  • All resources in plant health care 268
  • Environmental factors and damage 126
  • Fertilization and soil management 10
  • General information 61
  • Insects and pests 139
  • Tree diseases 171
  • Tree management and consulting 20

After removing a tree, how deep should one remove the stump in order to plant a new tree?

You want to select a spot that’s at least five feet from the old site, which will improve the chances of your new tree...

Plant health care
Insects and pests
Tree diseases
Environmental factors and damage

Air pollution injury

Canada, Great Britain, Ireland, United States

Air pollution injury occurs when certain air pollutants reach levels that cause health problems for plants and people…

Plant health care
Environmental factors and damage

Air pollution ozone

Canada, Great Britain, Ireland, United States

Ozone is an air pollutant that is created by the action of sunlight on automobile and industrial exhaust, or from nat…

Plant health care
Environmental factors and damage

American elm: Plant health care report

Canada, United States

American elm (Ulmus americana) is a large, grand shade tree that is adaptable to urban sites. It transplants…

Plant health care
General information

American holly: Plant health care report

Canada, United States

American holly (Ilex opaca) is a small-growing tree or shrub that provides year-round,&n…

Plant health care
General information

Apple: Plant health care report

Canada, United States

The domestic apple (Malus domestica) has dual value in the landscape because it produces attractive flowers …

Plant health care
General information

Are black tar spots on maple leaves harmful to the maple tree?

The black spots are a leaf disease called tar spot. It is not harmful to the tree.

Plant health care
Tree diseases

Are bore holes and bark splits in my mulberry caused by termites?

Have you "Pollarded" your Mulberry annually to maintain the size? Do you know approximately how old your tree is?...

Plant health care
Insects and pests
Tree diseases
Environmental factors and damage

Are earwigs in an otherwise healthy looking tree a problem?

Earwigs do not hurt the tree at all.

Plant health care
Insects and pests

Are stinkbugs attracted to maple trees?

Yes. Some additional trees they are attracted to are tree of heaven, redbud, and fruit trees. They are usually more of...

Plant health care
Insects and pests
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