The quarantine regulation for preventing entry of diseased plants into the country is done by which one of the following ?

In India, plant quarantine regulations are primarily governed by the Destructive Insects and Pests (DIP) Act, 1914, and the Plant Quarantine (Regulation of Import into India) Order, 2003 [t1][t5]. While the Directorate of Plant Protection, Quarantine and Storage (DPPQS) handles bulk commercial imports, the National Bureau of Plant Genetic Resources (NBPGR) is the designated nodal agency for the quarantine processing of all plant genetic resources (PGR), including germplasm and transgenic materials imported for research purposes [t1][t2][t6]. NBPGR ensures that imported materials are free from exotic pests and diseases that could threaten Indian flora [t1][t9]. Other bodies like the Botanical Survey of India (BSI) focus on floral surveys and taxonomy, while the National Botanical Research Institute (NBRI) focuses on botanical research, neither of which holds the regulatory mandate for plant quarantine enforcement [t1][t4].

Sources

1. [1] https://agritech.tnau.ac.in/export_import/imp_exp_plant_quar.html
2. [2] https://pmc.ncbi.nlm.nih.gov/articles/PMC7907825/