Tiny sticky droplets sprayed on crops to trap pests could be a green alternative to chemical pesticides, research has shown.
The insect glue, produced from edible oils, was inspired by plants such as sundews that use the strategy to capture their prey. A key advantage of physical pesticides over toxic pesticides is that pests are highly unlikely to evolve resistance, as this would require them to develop much larger and stronger bodies, while bigger beneficial insects, like bees, are not trapped by the drops.
Pests destroy large amounts of food and chemical pesticide use has risen by 50% in the past three decades, as the growing global population demands more food. But increasing evidence of great harm to nature and wildlife, and sometimes humans, has led to a rising number of pesticides being banned.
Some farmers already use alternatives to chemical pesticides, such as introducing other insects that kill the pests, but the new sticky drops are thought to be the first such biodegradable pesticide to be demonstrated.
Read more at theguardian.com