|
Species
Information
- garlic mustard
- Alliaria petiolata (Bieb.) Cavara & Grande
- USDA
Symbol: ALPE4
- Oregon
Noxious Weed Designation: B
- Pictures
Identification: Biennial; rosettes form by midsummer the first year, blooms May to June second year. Grows an average of 1-3 feet tall. Basal leaves dark green, kidney shaped, scalloped and 2-4 in. in diameter. Stem leaves alternate, sharply toothed, triangular, get smaller towards the top of the stem and produce a distinct garlic odor when crushed. Flower stalks usually single and unbranched. Flowers 1/4 in wide with 4 white petals that narrow at base.
Impacts: Garlic mustard displaces native forest understory species, reducing diversity and decreasing forage availablility for deer. Frequently invaded habitat types include forest opening edges, roads, streamsides, trails and agriculture land; it thrives in the partial shade of oak savanna. Displacement occurs rapidly, often within 10 years of establishment. This plant is very difficult to control one established.
Biological
Controls: No approved biological control agent is available.
Oregon
Maps of Garlic Mustard Distribution
Links:
USDA
Plants Database information on garlic mustard
GRIN
Database information on garlic mustard
Oregon Department
of Agriculture information on garlic mustard
|
