RICE (ORYZA-SATIVA) RESPONSE TO CLOMAZONE

Experiments were conducted in 1993 and 1994 to determine if seed treat ed with disulfoton at 3, 6, or 12 g ai kg(-1) reduced bleaching of ric e foliage caused by clomazone applied delayed preemergence at 0.56, 1. 1, 1.7, or 2.2 kg ai ha(-1) on silt loam and silty clay soils. Clomazo ne injured rice more on silt loam soil than on silty clay soil. Disulf oton reduced bleaching caused by clomazone. In additional field experi ments conducted during 1995 and 1996, clomazone at rates as high as 2. 2 kg ha(-1) did not affect grain yield in seven of 10 experiments. Clo mazone at rates below 1.7 kg ha(-1) did not reduce grain yield in any of the experiments.