Too many stinkbugs spoil the wine

The grape-loving insects are a foul-smelling addition

A stinkbug on a grape

BUGS INTO WINE  When marmorated stinkbugs (Halyomorpha halys, shown) get stressed, they release a chemical known to ruin red wine.

Vaughn Walton, © Oregon State University

How many stressed-out stinkbugs does it take to spoil a batch of wine? More than three per grape cluster, new research says.