Why should the cultivation of genetic crops be isolated from traditional agricultural planting areas? Urgent

To prevent genetic contamination.

This one is especially suitable for corn transgenic with Bt insect resistance gene.

The reason is that corn is a wind-pollinated crop, and genetically modified corn pollen will contaminate insect-resistant genes into the offspring of normal corn.

There is another reason why this kind of genetic pollution can cause a devastating blow to a certain food chain in the ecosystem.

For example, the herbicide-resistant rapeseed in the United States, because some weeds and rapeseed belong to the same genus in the family classification system, hybridization will produce fertile herbicide-resistant weed offspring, forcing Americans to abandon that farmland.

These weeds also changed the nutritional structure of the farmland ecosystem, causing some insects to disappear or mutate from relying on rapeseed as their sole food to feeding on weeds.