What are the disadvantages of DNA barcoding?

Limitations of DNA barcoding

• Potential for inaccurate results when large amounts of DNA from another species are present or when DNA is degraded
• Cannot be used to identify hybrid species or species that can hybridize naturally
• Creating reliable DNA barcodes for plant species has proven to be challenging 
• Cannot be used to determine the chemical components or plant materials used in processed products
• Cannot be used to quantify the amount of plant material used in a product
• Is not enough to determine country of origin in case of illegal wildlife trade even though it can be used for species identification