Advantages

There are several advantages in expressing Bt toxins in transgenic Bt crops:

• The level of toxin expression can be very high thus delivering sufficient dosage to the pest.
• The toxin expression is contained within the plant system and hence only those insects that feed on the crop perish.
• The toxin expression can be modulated by using tissue-specific promoters, and replaces the use of synthetic pesticides in the environment. The latter observation has been well documented world-wide.