Fig. 8.1 shows the proportion of cotton, maize and soybeans grown in the USA that are genetically
modifi ed in two different ways:
• HT crops are modifi ed to be resistant to the herbicide glyphosate
• Bt crops are modifi ed to express the Bt toxin which kills insect pests.
percentage of total
crop grown that is
genetically modified
100
HT soybeans 93