GB/T 33126-2016

This standard specifies the methods for detecting and identifying the stubby-root nematode *Paratrichodorus porosus*, a plant-parasitic species that can damage crops by feeding on roots. It is applied in agricultural quarantine and phytosanitary contexts, particularly during the inspection of imported or exported plant materials, soil, and growing media to prevent the introduction and spread of this nematode. The standard is used by plant protection agencies, customs laboratories, and agricultural research institutions to ensure accurate diagnosis and compliance with international trade regulations.