Many a child has refused to eat spaghetti on the grounds that it looked “just like worms.” (There’s even an old joke in which a baby bird refuses to eat his worms because to him they look like ...

Here’s what’s going on: While all sorts of insects have a taste for berries, one of the most likely culprits is the spotted wing drosophila (SWD), an invasive species of fruit fly that has become “a ...