Fine-tuned plant response to insect attack.(research indicates plants produce blends of chemicals in response to insect damage)(Brief Article)

From: Science News | Date: December 20, 1997| Author: Mlot, Christine | Copyright information

A caterpillar takes a chew of tobacco leaf. Then another. And another. A wasp appears and plants its stinger in the caterpillar, which eventually becomes food for the wasp's offspring.

There's more to this encounter than meets the eye. Prompted by spittle from the caterpillar, the wounded tobacco plant lofts a chemical scent into the air that tells the parasitic wasps where to find a nice, juicy meal. Even after the caterpillar has been removed, the wasps home in on a ...

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