| tpma.org | Texas Pest Management Association |
| pestworld.org | National Pest Management Association |
| opca.org | Oregon Pest Control Association |
| nmpma.org | NMPMA-The New Mexico Pest Management Association |
| agropolis.fr | International Organisation for Biological Control |
| gpca.org | The Georgia Pest Control Association |
| cornell.edu | Biological Control: A Guide to Natural Enemies in North America |
| vpmaonline.com | The Virginia Pest Management Association |
| unipa.it | International Organisation for Biological Control |
| pmanz.co.nz | Pest Management Association of New Zealand Inc. |
| reeusda.gov | www.reeusda.gov/ |
United States , Oregon , Corvallis