Herend Lucky Ladybug Rust Fishnet While it is hard to pin-point the exact start of its lucky status its beginnings most likely lie with farmers who considered the arrival of this aphid-eating bug a blessing and a way to ensure crop survival. While farmers may be fond of them birds and other predators quickly learn to avoid them since ladybugs do not taste very good and emit a toxin when attacked. One fateful encounter and the bright color and spotted pattern are forever seared in their enemies minds.