The first experiments with plants genetically modified to repel aphids are under way in the UK.
Wheat has been engineered with a gene from a peppermint plant so that it emits a particular pheromone.
The smell is the alarm signal given off by aphids to warn of an attack by predators.
The researchers hope that this will act as a “no parking sign” to keep the pests at bay without needing insecticide.
This is the first trial of a plant deliberately modified to use pheromones to ward off pests.
Read More: Anti-insect wheat trials launched