Nematodes |
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Potato Cyst Nematode
The potato cyst nematode, Globodera pallida, is a major pest of potato crops in cool-temperate areas. It primarily affects plants within the potato family including tomatoes, eggplants, and some weeds. If left uncontrolled, potato cyst nematodes can cause up to 80 percent yield loss in potato fields.
The potato cyst nematode is widely distributed in many potato-growing regions throughout the world. In North America, besides the current find in Idaho, the nematode is also known to be present on the island of Newfoundland, Canada. Potato cyst nematode infestations may be associated with patches of poor growth in potato fields. At high nematode populations, affected potato plants may exhibit yellowing, wilting or death of foliage – none of which has been observed in Idaho potato fields.
Early detection of pests minimizes agricultural production costs and enhances product quality and marketability. Lengthy crop rotation and nematicides (fumigants or granular systemic compounds) are an effective and practical means of control. The current recommendations for rotations are 7 to 15 years without potatoes or host crops. The integration of these methods can be used to manage the nematode population levels below economic thresholds.
Chronology (PDF; 24 Kb)
Maps
- Regulated Fields Map (PDF; 418 Kb)
- March 21, 2008 (PDF; 418 Kb)
- March 4, 2008 (PDF; 433 Kb)
- Changes to Regulated Fields Map
- March 21, 2008 (PDF; 11 Kb)
- March 4, 2008 (PDF; 11 Kb)
- Location Description of Changes
- March 21, 2008 (PDF; 20 Kb)
- Worldwide Distribution
National Survey Plan
- 2008 National Survey Plan (PDF; 327 Kb)
- Data Management (PDF; 46 Kb)
- Draft National Survey Protocol (PDF; 226 Kb)
- Potato Cyst Nematode Guidelines - Guidelines on Surveillance and Phytosanitary Actions (PDF; 712 Kb)
Program Updates
Publications
- Questions and Answers: PCN and the National Survey Plan (PDF)
- APHIS Pest Alert (PDF; 384 Kb)
Regulations
- Federal Order (PDF; 31 Kb)
- Potato Cyst Nematode; Quarantine and Regulations; Interim rule and request for comments (PDF; 121 Kb)
Scientific Information