Aventis Crop Science will release two new FiberMax cotton varieties in 2000, FM 958, tested as IG1017 in 1998 and ACSI EXP0052 in 1999; and FM 966, tested as IG1019 in 1998 and ACSI EXP0222 in 1999. These two varieties began initial development in the CSIRO breeding program, and were selected as elite strains by ACSI, Aventis Cottonseed International, at the Leland, MS, breeding station. FM 958 and FM 966 will replace FM 963 and FM 975 in the FiberMax product line. These two varieties provide adaptability to shorter season production management combined with excellent fiber quality.