How is Nicotiana tabacum different from Nicotiana rustica?

Nicotiana tabacum and Nicotiana rustica are distinct species within the tobacco genus, differing primarily in their growth cycles and chemical properties:

• Maturity: Nicotiana tabacum, the common commercial tobacco, requires a frost-free period of 100 to 130 days to reach maturity. In contrast, Nicotiana rustica, also known as Aztec tobacco, matures more quickly.1
• Potency: Nicotiana rustica is characterized as being more potent than Nicotiana tabacum.1
• Cultivation: While Nicotiana tabacum is the primary species grown for global commercial use, Nicotiana rustica is cultivated to a more limited extent, primarily in regions such as India, Vietnam, and certain Transcaucasian countries.21

Both species are used for smoking, chewing, and snuffing, as well as for the extraction of nicotine, which serves as a natural chemical defense for the plants against insects and other herbivores.23