Effects of sodium bisulphate, acidic buffers and ammonium sulphate on imazamethabenz phytotoxicity to wild oats

Liu, Shu Hua; Hsiao, A. I.

doi:10.1016/0261-2194(92)90059-e

Cited by 5 publications

(9 citation statements)

References 20 publications

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“…The efficacy of 1 kg ha -1 imazamethabenz plus (NH4)2SO 4 equals the efficacy of 1.46 kg ha -1 imazamethabenz alone. This supported our previous work (Liu et al 1992), which showed that the addition of 1% (NH4)2SO 4 increased the phytotoxicity of the imazamethabenz in wild oat control.…”

Section: Phytotoxicity Experimentssupporting

confidence: 91%

“…Our use of a suspension concentrate formulation of imazamethabenz, which is not readily water soluble, may have contributed to our results. The addition of (NH4)2SO 4 did not clarify the suspension, in contrast to the effect of sodium bisulfate addition (Liu et al 1992). Much more crystalline deposit, which is characteristic of imazamethabenz presence, was microscopically visible on leaf surfaces treated with imazamethabenz plus (NH4)2SO 4 than on leaves treated with imazamethabenz alone.…”

Section: Experiments On Uptake and Translocationmentioning

confidence: 75%

“…We have reported that (NH4)2SO 4 increases wild oat control with imazamethabenz (Liu et al 1992). The mechanism of the effect, the dose relationship of (NH4)2SO 4 to the herbicide, and the growth stage response were not studied.…”

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confidence: 92%

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Effect of ammonium sulfate on the phytotoxicity, foliar uptake, and translocation of imazamethabenz in wild oat

Hsiao

Liu

1996

J Plant Growth Regul

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Abstract. Experiments were conducted in greenhouse, growth chamber, and laboratory conditions to determine the effect of ammonium sulfate [(NH4)2504] on the phytotoxicity, foliar uptake, and translocation of imazamethabenz on wild oat. Rates of (NH4)2SO 4 up to 5% (w/v) applied with a greenhouse sprayer did not affect the phytotoxicity of the herbicide when the mix was applied at the one-to two-leaf stage. However, inclusion of 1 and 2% (NH4)2SO 4 increased the phytotoxicity of the herbicide when the mix was sprayed at the two-to three-leaf, or the three-to four-leaf stage. At 10%, (NH4)2SO 4 decreased the phytotoxicity of the sublethal dosage of the herbicide. When the herbicide was applied as individual drops to the growth chamber-grown plants, inclusion of (NH4)2SO 4 at 1% did not affect phytotoxicity as measured by shoot growth. The presence of (NH4)2SO 4 did not affect the amount of imazamethabenz retained by wild oat foliage, but it decreased [14C]imazamethabenz absorption, slightly antagonized acropetal translocation, and increased the basipetal translocation of [14C]imazamethabenz. It was concluded that application methods greatly modify the effect of (NH4)2SO 4 on imazamethabenz phytotoxicity. Herbicide absorption and translocation as determined by one method do not necessarily represent the absorption and translocation patterns when different application methods are used. Absorption and translocation were not the factors that were responsible for the observed effect of (NH4)2SO 4 on the herbicide phytotoxicity.

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Section: Phytotoxicity Experimentssupporting

confidence: 91%

Section: Experiments On Uptake and Translocationmentioning

confidence: 75%

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Effect of ammonium sulfate on the phytotoxicity, foliar uptake, and translocation of imazamethabenz in wild oat

Hsiao

Liu

1996

J Plant Growth Regul

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“…These effects of (NH 4 ) 2 SO 4 and NaHSO 4 on imazamethabenz phytotoxicity disappeared when the plants were subjected to moisture stress. With nonstressed wild oat plants, other studies showed that NaHSO 4 resulted in only a moderate enhancement in imazamethabenz activity, which appeared to be related to herbicide solubility and absorption (Liu et al 1992(Liu et al , 1995. The response of low rates of imazamethabenz to (NH 4 ) 2 SO 4 was also marginal (Liu et al 1992).…”

Section: Effect Of Additives On Imazamethabenz Phytotoxicitymentioning

confidence: 96%

“…Additives (Liu et al 1992(Liu et al , 1995 and MCPA (Liu et al 1994) have been shown to influence imazamethabenz phytotoxicity in nonstressed environments. In addition, the performance of fenoxaprop in wild oat under nonstressed conditions was found not to be affected by (NH 4 ) 2 SO 4 (Harker 1995) and MCPA (Deschamps et al 1990).…”

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confidence: 99%

Effect of Environment on Wild Oat (Avena fatua) Control with Imazamethabenz or Fenoxaprop Tank-Mixed with Additives or MCPA

Xie

Hsiao

1997

J Plant Growth Regul

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Greenhouse and growth chamber experiments were conducted to determine the effect of soil moisture and temperature on the phytotoxicity in wild oat of imazamethabenz or fenoxaprop tank-mixed with certain additives or MCPA. The surfactants Agral 90 at 0.5% and Enhance at 0.5% increased imazamethabenz phytotoxicity under both moist and drought conditions. These surfactants had no significant effect on fenoxaprop phytotoxicity regardless of the soil moisture regimes. Fenoxaprop activity was increased by ammonium sulfate [(NH 4 ) 2 SO 4 ] at 1% but only under well watered conditions. Wild oat control with imazamethabenz was also slightly enhanced in a well watered regime by the addition of sodium bisulfate (NaHSO 4 ) at 0.13%. At high temperature (30/20°C) and low temperature (10/5°C), the phytotoxicity of imazamethabenz was increased when tank-mixed with Agral 90 at 0.25% or NaHSO 4 at 0.13% compared with that when imazamethabenz was applied alone, if soil moisture was adequate. There was no such increase under conditions of drought and high temperature. (NH 4 ) 2 SO 4 at 1% did not significantly affect imazamethabenz performance irrespective of temperature/soil moisture conditions. The phytotoxicity to wild oat of imazamethabenz or fenoxaprop was not changed by tank-mixing with MCPA isooctyl ester at 300 g a.i./ha, regardless of soil moisture levels. The reduced fenoxaprop phytotoxicity in wild oat due to moisture stress was not readily alleviated by the inclusion of selected additives or MCPA in the tank mixture.

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Effect of drought and formulation on wild oat (Avena fatua) control with imazamethabenz and fenoxaprop

Xie

Hsiao

1994

Crop Protection

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Effects of sodium bisulphate, acidic buffers and ammonium sulphate on imazamethabenz phytotoxicity to wild oats

Cited by 5 publications

References 20 publications

Effect of ammonium sulfate on the phytotoxicity, foliar uptake, and translocation of imazamethabenz in wild oat

Effect of ammonium sulfate on the phytotoxicity, foliar uptake, and translocation of imazamethabenz in wild oat

Effect of Environment on Wild Oat (Avena fatua) Control with Imazamethabenz or Fenoxaprop Tank-Mixed with Additives or MCPA

Effect of drought and formulation on wild oat (Avena fatua) control with imazamethabenz and fenoxaprop

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