Effects of rotational crop herbicides on rice (Oryza sativa)
1995
Johnson, D.H. | Beaty, J.D. | Horton, D.K. | Talbert, R.E. | Guy, C.B. | Mattice, J.D. | Lavy, T.L. | Smith, R.J. Jr
Experiments were conducted from 1989 to 1991 on two silt loam and two clay soils to determine the effect of herbicides applied to the previous crop on growth and yield of rice. All herbicides were applied preplant-incorporated at recommended rates adjusted as needed for soil texture. Rice was planted the following year. Imazaquin, imazethapyr, alachlor, metolachlor, clomazone, trifluralin, and atrazine did not injure rice the year following application. Norflurazon was the only herbicide to injure rice on silt loam soils, with injury at one silt loam location in one of two years. Norflurazon and flumeturon residues caused rice injury on clay soils, and chlorimuron residues caused injury in one year on a clay soil. This chlorimuron carryover injury was from August-planted soybean but did not occur from June-planted soybean. Norflurazon, fluometuron, and chlorimuron temporarily reduced rice dry matter early in the season. No herbicide reduced either rough rice or percent head rice yield on any of the soils.
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