By Sharon Cohoon, Sunset senior garden writer

Try this out on those horticultural wizards who think they know it all.

Q.  There's one crop where ladybugs, usually considered the best of the beneficial insects, are considered a pest.  What is it?

Answer: Wine grapes.  The reason?  A chemical the bug exudes will ruin the taste of the wine if the ladybug is accidentally mashed up with the grapes.

Source:  Pete Anderson, grape mentor for the San Diego Amateur Winemakers Society, and the guest speaker at last month's meeting of the San Diego Horticultural Society.