NEW ORLEANS (AP) — First it came for your wetlands. Now it's coming for your crawfish and your rice.

A foreign snail that appeared in Louisiana just over 10 years ago and quickly infested ponds, bayous and streams in about 30 parishes has recently found its way to the farms that produce two of the state's favorite foods.

The invasive apple snail has shut down harvest at some crawfish farms in Vermilion, Acadia and Jefferson Davis parishes and has made its first devastating appearance in rice fields. In March, the invasive mollusks wiped out a 50-acre field of rice, marking the first reported c...