Effect of MCPA and fenoxaprop on phytotoxicity, retention, foliar uptake and translocation of imazamethabenz in wild oat

Liu, Shu Hua; Hsiao, A. I.; Wolf, Thomas M.; Hume, Judith A.

doi:10.1016/0261-2194(94)00020-9

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…As such, because flax has acceptable tolerance to fluthiacet-methyl, there is potential for this herbicide to be applied in a mix to broaden the spectrum of weeds controlled in the field. While some herbicide mixtures act synergistically to improve weed control, there is also the potential for antagonistic interactions to occur between herbicides (Liu et al 1995;O'Sullivan et al 1977;Qureshi and Vanden Born 1979). In winter wheat (Triticum aestivum L.), mixes of dicamba þ MCPA þ mecoprop caused notable crop injury, which in turn reduced crop height and crop yield (Sikkema et al 2007).…”

Section: Flax Population Height and Yieldmentioning

confidence: 99%

Tolerance of flax (Linum usitatissimum) to fluthiacet-methyl, pyroxasulfone, and topramezone

et al. 2019

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Flax yield can be severely reduced by weeds. The combination of limited herbicide options and the spread of herbicide-resistant weeds across the prairies has resulted in a need for more weed control options for flax producers. The objective of this research was to evaluate the tolerance of flax to topramezone, pyroxasulfone, flumioxazin, and fluthiacet-methyl applied alone as well as in a mix with currently registered herbicides. These herbicides were applied alone and in mixtures at the 1X and 2X rates and compared with three industry standards and one nontreated control. This experiment was conducted at Carman, MB, and Saskatoon, SK, as a randomized complete block with four replications. Data were collected for crop population, crop height, yield, and thousand-seed weight. Ratings for crop damage (phytotoxicity) were also taken at three separate time intervals: 7 to 14, 21 to 28, and 56+ d after treatment. Crop tolerance to these herbicides varied between site-years. This was largely attributed to differences in spring moisture conditions and the differences in soil characteristics between sites. Herbicide injury was transient. Hence, no herbicide or combination of herbicides significantly impacted crop yield consistently. Flumioxazin was the least promising herbicide evaluated, as it caused severe crop damage (>90%) when conditions were conducive. Overall, flax had excellent tolerance to fluthiacet-methyl, pyroxasulfone, and topramezone. Flax had excellent crop safety to the combination of pyroxasulfone + sulfentrazone. However, mixing fluthiacet-methyl and topramezone with MCPA and bromoxynil, respectively, increased crop damage and would not be recommended.

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Section: Flax Population Height and Yieldmentioning

confidence: 99%

Tolerance of flax (Linum usitatissimum) to fluthiacet-methyl, pyroxasulfone, and topramezone

et al. 2019

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“…Tank mixing with MCPA ester, (4-chloro-2-methyl-phenoxy)acetic acid, extends the spectrum of weed control without adversely affecting imazamethabenz phytotoxicity to wild oat, but the addition of MCPA amine or fenoxaprop, (_)-2-[4-[(6-chloro-2-benzoxazolyl)oxy]phenoxy]propanoic acid, antagonizes wild oat control (Liu et al 1995a). The addition of adjuvants also affects the phytotoxicity of imazamethabenz.…”

mentioning

confidence: 97%

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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Effect of MCPA and fenoxaprop on phytotoxicity, retention, foliar uptake and translocation of imazamethabenz in wild oat

Cited by 2 publications

References 14 publications

Tolerance of flax (Linum usitatissimum) to fluthiacet-methyl, pyroxasulfone, and topramezone

Tolerance of flax (Linum usitatissimum) to fluthiacet-methyl, pyroxasulfone, and topramezone

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

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