Pilfered plant gene made insect a pest.

The article looks at a study by researcher Roy Kirsch and others published in journal "Cell" which found fly's descendants become notorious agricultural pests and gene helps plants neutralize and safely store certain toxic molecules they use to deter herbivores. It mentions plant-to-insect gene swap and genetic toolkit of their "prey" to use it against them. It also mentions gene allows plants to neutralize a class of defensive chemicals called phenolic glycosides.