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
Oviposition marks on nodding thistle.

The brown dots indicate where the insects have laid their eggs.