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Agrilus anxius, the bronze birch borer, is a wood-boring buprestid beetle native to North America, more numerous in the warmer parts of the continent and rare in the north. [1] It is a serious pest on birch trees (Betula), frequently killing them. The river birch Betula nigra is the most resistant species, while other American birches are less so.
Agrilus is a genus of jewel beetles, notable for having the largest number of species (about 3000) of any single genus in the animal kingdom. [3] Species of the genus have a cosmopolitan distribution on all continents except Antarctica, [ 4 ] and feed on a wide variety of flowering plant hosts. [ 5 ]
[2] Ten species of flatheaded borers of the family Buprestidae feed on spruce and fir, but hemlock is their preferred food source (Rose and Lindquist 1985). [3] As with roundheaded borers, most feeding occurs in dying or dead trees, or close to injuries on living trees. Damage becomes abundant only where a continuing supply of breeding material ...
Salem is set to remove 34 trees from Minto-Brown Island Park ahead of $1.54 million in parking lot improvements. Most of the trees — 31 non-native European white birches — need to be removed ...
Like other North American birches, gray birch is highly resistant to the bronze birch borer (Agrilus anxius). [10] This is due to birches in North America sharing a coevolutionary relationship with the borer, allowing it to develop resistance to the bug. Despite this, the borers can still damage the trees if they are weakened by other means.
Oobius agrili is a parasitic non-stinging wasp of family Encyrtidae which is native to North Asia.It is a parasitoid of the emerald ash borer (Agrilus planipennis Fairmaire, family Buprestidae), an invasive species which has destroyed tens of millions of ash trees in its introduced range in North America.
Bronze birch borer is a major pest among birch species. [25] Under repeated infestation or stress to the tree from other sources, bronze birch borers may kill the tree. [25] The insect bores into the sapwood, beginning at the top of the tree and causing death of the tree crown. [26] The insect has a D-shaped emergence hole where it chews out of ...
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