How Hawk Moths Know Where to Lay Hornworm Eggs

deluxestogie

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Tobacco Hawk Moth (Manduca sexta) Smells with its Wings

If you have ever wondered how the moth that produces tobacco hornworms finds the right plants, even before any blossoms appear, this research has found the answer.

The Hawk Moth wings have stubby, porous, sensory hairs, and can smell various aromas.

"...they concluded that the moth's wings likely sense bitter flavors and the aroma of amines, which smell like rotting fish to us."
"...the wing only picked out two odors, pyrrolidine and piperidine, both of which are stinky amines found in the leaves of nightshade plants, on which tobacco hawkmoths prefer to lay their eggs."

And of course, tobacco is in the nightshade family.

Bob
 
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