The impact of Bt crops on beneficial non-target organisms became a public issue after a 1999 paper suggested they could be toxic to monarch butterflies.
Ius entik-entikan Bt ring organisme non-target sane mabuat dados wicara parajanane risampune wenten makalah warsa 1999 sane ngawedarang dane prasida dados tuba majeng  kupu-kupu raja.