ABSTRACT Arie Nugroho 01-1114/P The aim of this research is to study rate of patoge- nicity of Bacillus thuringiensis in kind of cultivation media as controlling agent on Plutella xylostella worn on cabbage. The research was carried out forn June to ber 1998, at Ngablak Village, Ngablak District, Magelang Regency, Central Java, at altitude 1393 meters above ses level. on Andosol so…