How do insect-resistant crops operate?

Insect-resistant crops operate primarily by producing proteins that are harmful to specific pests. This is achieved through the incorporation of genes that code for these proteins, commonly known as insecticidal proteins. One well-known example of this mechanism is the production of Bacillus thuringiensis (Bt) proteins. These proteins are toxic to certain insects upon ingestion, effectively disrupting their digestive systems and leading to their mortality.

The targeted nature of these proteins allows them to control pest populations while minimizing impact on non-target organisms and beneficial insects, making this technology an effective and sustainable method of pest management in agriculture. Moreover, by selectively targeting specific pests, these genetic modifications can reduce the reliance on chemical insecticides, thus benefiting the environment and human health.

In contrast, other methods mentioned do not contribute to the primary mechanism of insect resistance offered by these genetically modified organisms. Some avenues, such as attracting natural pest predators or repelling pests through odors, may play a role in integrated pest management but do not define the core function of insect-resistant crops. Meanwhile, changing color to alert farmers does not relate to pest resistance and is not a characteristic of crop biotechnology.