more about biological control & the program

Biological control availability can be limited, and in some cases non-existent based on environmental conditions. Partaking in this program will require:

  • flexibility

  • last minute availability

  • patience

Agents are only available at pre-determined times by the CMWA. Join our biocontrol email list to receive notifications about timing and availability. We notify our biocontrol emailing list when the season is underway, gauging interest and demands. Please contact us to join our biocontrol list.

 

Prices may vary by season and by insect.

 

Please note the 'emerge' and 'collect & release' timing information below. If you are inquiring before or after that identified time, the agent you are looking for will not be available due to its life cycle.

COMMON BIOCONTROL SPECIES

Knapweed species

Knapweed Root Weevil

Scientific Name

Cyphocleonus achates

Noxious Weed

Knapweed

Emerge

August

Collect/Release/Monitor

Late summer

CMWA Use

Yes, monitor for it

Knapweed Flowerhead Weevil

Scientific Name

Larinus minutus & Larinus obtusus

Noxious Weed

Knapweed 

Emerge

July

Collect/Release/Monitor

Summer when the plants are in early flowering stages

CMWA Use

Not usually b/c very mobile, monitor for it

Toadflax species

Toadflax Stem Weevil

Scientific Name

Mecinus janthiniformis

Noxious Weed

Dalmatian toadflax

Emerge

May - June

Collect/Release/Monitor

Spring thru mid-summer as plants are bolting to late flowering

CMWA Use

Sometimes, monitor for it

Toadflax Stem Weevil

Scientific Name

Mecinus janthinus

Noxious Weed

Yellow toadflax

Emerge

May - June

Collect/Release/Monitor

Spring thru mid-summer as plants are bolting to late flowering

CWMA Use

Sometimes, monitor for it

Leafy Spurge

Leafy Spurge Flea Beetle

Scientific Name

Aphthona species

Noxious Weed

Leafy Spurge

Emerge

June - July

Collect/Release/Monitor

Late summer when plants are flowering and beginning to mature

CWMA Use

Yes, monitor for it

Leafy Spurge Stem Borer

Scientific Name

Oberea erythrocephala

Noxious Weed

Leafy Spurge

Emerge

May - June

Collect/Release/Monitor

Early summer as plants are flowering

CWMA Use

Rarely, but monitor for it

Leafy Spurge Hawk-moth

Scientific Name

Hyles euphorbiae

Noxious Weed

Leafy Spurge

Emerge

May - July

August - Septmeber

Collect/Release/Monitor

Two generations: first early to mid summer, second late summer

CWMA Use

No, but monitor for it

"Working to maintain the productivity, biodiversity, and beauty of Park County."

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