Pests and Diseases By Tree Type
11
articles found
Boxwoods
Box Tree Moth
This invasive Asian insect (Cydalima perspectalis) is a pest that causes severe damage to boxwoods.
White Pine
Blister Rust
White pine blister rust is a fungal disease that attacks all five-needle or white pines.
Birch
Bronze Birch Borer
White barked birch and ornamental birch are susceptible to this beetle that disrupts water and nutrient flow to the tree.
Fir
Black Pineleaf Scale
Black pineleaf scale is a scale insect that impact Douglas fir and all other pine species.
Fir
Swiss Needle Cast
Swiss needle cast is a foliage disease specific to the douglas fir tree caused by fungus.
Ash
Emerald Ash Borer
The emerald ash borer is a destructive non-native wood boring pest that affects ash trees.
Fruit Trees
Apple Scab
Apple scab is caused by fungus and is a serious fungal disease of the apple in Ontario infecting foliage, blossoms and fruits.
Oak
Oak Wilt
Oak wilt is a fungus that grows on the outer sapwood of oak trees, restricting water and nutrient flow through the tree.
Elm
Dutch Elm Disease
Dutch elm disease is a high invasive fungal disease that has been in Ontario since 1946.
Fruit Trees
Black Knot
Black knot is a fungal disease that affects cherry and plum trees.
Oak
Sudden Oak Death
Sudden oak death is a tree disease caused by a water mould.