The aim of this study is to know the influence of irradiation to sugarcane ripening characters, thus it can be used determine the harvesting time. This study conducted in crop year 1989 - 1990 at lowland in Pasuruan, used 25 sugarcane mutants and two test varieties in randomized block design. The result showed that the mutant of irradiation by 3- 5.5 Krad, generally has earlier ripening character with higher sucrose content than the original varieties. However, there are non changable ripening mutant with high sucrose content.Soepriyanto* Pusat Penelitian Perkebunan Gula Indonesia
