Boundary Invasive Species Society
Biological control in the Boundary
Mogulones crucifer
Controls hound's tongue. Small round chew holes in the leaves are a sign that the insects are present.
Mecinus janthiniformis
Controls dalmatian and yellow toadflax. Eggs are laid in cavities chewed into the shoots.
Aceria malherbae
Controls field bindweed. Mites produce galls that causes the leaves to curl.
Cyphocleonus achates
Controls spotted and diffuse knapweed. Larvae develop in the root.
Chrysolina spp.
Controls St. John's wort. Adults feed on leaves and flowers. They are a metallic bronze-green colour.
Aphthona flava
Controls leafy spurge. Larvae feed on the roots and the adults feed on the leaves of the plant.
Larinus minutus
Controls spotted and diffuse knapweed. Larvae develop in the flower head and eat the seeds.
Larinus planus
Controls Canada thistle and nodding thistle. Flower heads with larvae in them have small brown marks.
Agapeta zoegana
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.
The insects are working! Check out the before and after photos.
Hound's tongue
Canada Thistle
Diffuse knapweed
Spotted knapweed
Leafy spurge
St. John's Wort
Dalmatian toadflax GF
Dalmatian toadflax 2012
How to tell if bio insects are present