CARRYOVER OF DPX-PE350 TO GRAIN-SORGHUM (SORGHUM-BICOLOR) AND SOYBEAN(GLYCINE-MAX) ON 2 ARKANSAS SOILS

Field experiments were conducted to determine carryover potential to g rain sorghum and soybean of DPX-PE350 applied POST at 0.05, 0.1, and 0 .2 kg ai ha-1 to cotton the previous year. DPX-PE350 did not injure so ybean or affect yield adversely. Grain sorghum was injured and maturit y delayed on a Sharkey silty clay but not on a Calloway silt loam. Gra in sorghum yield was reduced on both soils 16 and 22%, respectively, b y residues from the 0.1 and 0.2 kg ha-1 rates of DPX-PE350. In an incu bation study, dissipation of DPX-PE350 was greater at 35 C than at 5 C , and did not differ between the two soils.