Passage: Evolution has endowed caterpillars that feed on corn with a unique ability: they can induce the plant to turn off its defence against insect predators. This helps caterpillars to eat more and grow faster. The agent that causes this effect is the caterpillar's faeces or frass. The find could throw new light on compounds associated with plant response to pathogens like fungi or bacteria. Which one of the following statements best reflects the most logical, rational and practical message conveyed by the passage?