Biological products and consulting services
for weed management

New insects available:

• Sphenoptera jugoslavica: bronze knapweed root borer. This insect attacks the roots of diffuse (preferred) and spotted knapweed. surviving plants are stunted and produce fewer flowers. Often causes impressive population crash of diffuse knapweed.

• Knapweed root boring weevil Cyphocleonus achates: This relatively new insect is very large and hardy. These weevils do a great deal of damage to roots and often kill attacked plants. This species is our top pick for spotted knapweed control. 150 weevils per release. $120 per release.

• Stem boring weevil Mecinus janthinus: This insect is causing dramatic declines in toadflax density, often very quickly by bio-control standards. A must-have for any toadflax program. $100 per release.