Biological Control

 Cyphocleonus achates, knapweed root boring weevil 

Cyphocleonus achates, knapweed root boring weevil 

Biological controls are small insects that feed on noxious weeds, reducing their ability to reproduce and spread, they are an excellent tool to reduce large weed populations. These insects go through rigorous testing with USDA to ensure they will only cause damage to the intended target weed species.  

Biological controls are available for the following weed species; Dalmatian toadflax, diffuse and spotted knapweeds, Russian knapweed, Canada thistle and common St. Johnswort.

Please contact the CCT Land Operations/Range Program to see if these insects would be right for your property. To have your name added to the list for FREE distribution as insects become available.