GB7331-2003
Plant quarantine rules for potato seed tubers producing areas
马铃薯种薯产地检疫规程
GB 7331-2003 is a current mandatory Chinese national standard for Plant quarantine rules for potato seed tubers producing areas. It appears in the Food compliance cluster with a testing methods focus and has an implementation date of Nov 1, 2003.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to the plant quarantine protocols for potato seed tubers producing areas within China. It is mandatory for all quarantine authorities and any entities involved in the breeding and production of potato seed tubers, including private farms and individual households. It is specifically designed for phytosanitary certification at the place of origin and does not apply to post-market retail distribution.
Technical requirements
GB 7331-2003 categorizes regulated threats into quarantine pests and regulated non-quarantine pests. Quarantine pests include Potato Wart Disease and the Colorado Potato Beetle, while regulated non-quarantine pests include Potato Bacterial Wilt, Blackleg, and Ring Rot. The standard mandates strict site selection, requiring seed tuber fields to be located in pest-free areas or designated non-occurrence production points. For the production of healthy seed tubers, the standard requires the use of virus-free seedlings or purified seeds. It outlines specific epidemic prevention measures, including crop rotation, soil disinfection, and the establishment of 2km isolation zones around seed production sites to prevent pest infestation. Any discovery of quarantine pests requires immediate eradication and destruction of infected plants. Additionally, the standard sets requirements for storage management to prevent post-harvest infection. This includes strict sorting to remove diseased tubers, container disinfection, and maintaining specific temperature and humidity levels (e.g., 1°C to 3°C) in ventilated storage facilities.
Testing methods
The evaluation process primarily relies on field investigations conducted at three critical growth stages: when seedlings reach 20cm-25cm in height, during full bloom, and two weeks before harvest. The inspection requires random sampling based on field size, with visual identification of disease symptoms and pest damage. For cases that cannot be definitively diagnosed in the field, the standard mandates laboratory testing. This includes microscopic examination and staining techniques for fungal and bacterial pathogens, such as Gram staining for Ring Rot. For Potato Bacterial Wilt, the standard references the use of enzyme-linked immunosorbent assay (NCM-ELISA) for precise detection.
FAQs
What specific pests and diseases are regulated under GB 7331-2003?
The standard regulates against quarantine pests such as Potato Wart Disease and the Colorado Potato Beetle, as well as regulated non-quarantine pests including Potato Bacterial Wilt, Blackleg, and Ring Rot.
Are there any significant updates from the previous version of GB 7331?
Yes, this version replaced GB 7331-1987. It expanded the scope to include private farms and households, added the Colorado Potato Beetle and Potato Bacterial Wilt to the regulated list, and introduced international concepts of pest-free areas.
How does GB 7331-2003 align with international quarantine standards?
The standard aligns with international phytosanitary concepts, such as pest-free production sites, and references testing methodologies like the NCM-ELISA method provided by the International Potato Center (CIP) for Potato Bacterial Wilt.
The summary above provides a high-level overview of GB 7331-2003. To ensure complete compliance for your agricultural products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 7331-2003 today to access all detailed parameters, quarantine procedures, and testing protocols.
Applicability hints
- Type
- Method
- CCS
- B21
- ICS
- 65.020.40
- Competent department
- Ministry of Agriculture and Rural Affairs
- Technical committee
- Ministry of Agriculture and Rural Affairs