Boundary Invasive Species Society
Biological control in the Boundary
Controls hound's tongue. Small round chew holes in the leaves are a sign that the insects are present.
Controls dalmatian and yellow toadflax. Eggs are laid in cavities chewed into the shoots.
Controls field bindweed. Mites produce galls that causes the leaves to curl.
Controls spotted and diffuse knapweed. Larvae develop in the root.
Controls St. John's wort. Adults feed on leaves and flowers. They are a metallic bronze-green colour.
Controls leafy spurge. Larvae feed on the roots and the adults feed on the leaves of the plant.
Controls spotted and diffuse knapweed. Larvae develop in the flower head and eat the seeds.
Controls Canada thistle and nodding thistle. Flower heads with larvae in them have small brown marks.
Controls spotted and diffuse knapweed. Larvae mine the root which stresses the plant.
For information on all the different bio agents
The brown dots indicate where the insects have laid their eggs.