Metabolism of Imazethapyr (AC 263499) Herbicide in Corn

Mallipudi, N. Moorthy; Lee, An-Horng; Fiala, Roderik; Dacunha, Adrian R; Safarpour, M.

doi:10.1021/jf00041a031

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…Mallipoodi et al 28) demonstrated that though imazethapyr metabolizes rapidly in corn plants through oxidative hydroxylation at the α-carbon atom of the ethyl substituent on the pyridine ring to yield α-(hydroxylethyl)-imazethapyr, it left 0.08 and 0.02 ppm of imazethapyr residues in mature stalk, and seed of corn.…”

Section: Terminal Residues Of Imazethapyr In Soybean Grains and Strawmentioning

confidence: 99%

“…6,8,21,[26][27][28][29][30][31][32] Dissipation of imazethapyr is faster in soils with a high pH and low adsorption since the amount available in the soil solution for microbial transformation is greater. A low concentration of imazethapyr in soil is also compensated for high microbial activity, which increases the rate of degradation.…”

Section: Terminal Residues Of Imazethapyr In Soilmentioning

confidence: 99%

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Determination of imazethapyr residues in soil and grains after its application to soybeans

Sondhia

Khankhane

Singh

et al. 2015

Journal of Pesticide Science

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Imazethapyr is widely used in soybean, and leguminous crops for control of wide variety of broad leaf weed species. A study was conducted to evaluate residues of imazethapyr in the soil and soybean grain at five different locations in India. Imazethapyr was applied at 100 g/ha, as a post emergence herbicide to control weeds in soybean fields. Residues of imazethapyr were found in the range from 0.006 to 0.018 µg/g in the soybean grains samples in all five locations. However in the soil, residues were found to be below 0.0010 µg/g in four locations, and 0.0015 µg/g in one location. Less residues were found in soils as compared to plant samples. Based on this study a pre-harvest interval of 90-102 days is suggested for soybean crops after imazethapyr application. This indicates the judicious use of imazethapyr by farmers in soybean fields.

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Section: Terminal Residues Of Imazethapyr In Soybean Grains and Strawmentioning

confidence: 99%

Section: Terminal Residues Of Imazethapyr In Soilmentioning

confidence: 99%

Determination of imazethapyr residues in soil and grains after its application to soybeans

Sondhia

Khankhane

Singh

et al. 2015

Journal of Pesticide Science

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“…Mallipudi et aI. (16) reported that imidazolinone-tolerant com was able to metabolize the parent molecule rapidly, even when imazethapyr was applied at four times the normal use rate. The development of tolerant lines for commercial use may affect corn production in several ways.…”

Section: Introductionmentioning

confidence: 99%

Effect of AC 263,222, Imazethapyr, and Nicosulfuron on Weed Control and Imidazolinone-Tolerant Corn (Zea mays) Yield

Monks¹,

Wilcut²,

Richburg³

et al. 1996

Weed technol.

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Imidazolinone herbicides injure currently available commercial field corn cultivars; however, cultivars resistant to these herbicides have been developed. Sicklepod, Texas panicum, and annual morningglory control using AC 263,222 (36 and 72 g ai/ha), imazethapyr (36 and 72 g ai/ha), or nicosulfuron (35 g ai/ha) applied POST at 2,4, and 6 wk after planting were evaluated in imidazolinone-tolerant corn. Studies were conducted at Attapulgus and Plains, Georgia from 1992 through 1993. Nicosulfuron and AC 263,222 at 72 g/ha controlled Texas panicum at least 87% when applied 2 wk after planting. Imazethapyr did not consistently control Texas panicum or sicklepod, regardless of application rate. AC 263,222 at both rates and nicosulfuron controlled sicklepod at least 86% when applied 2 wk after planting; however, later application or application under dry conditions generally resulted in reduced control. All herbicides controlled the entireleaf and pitted morningglory complex at least 84% when applied 2 wk after planting. Imidazolinone-tolerant corn was tolerant to all herbicides, regardless of rate and timing, and generally yielded greater when weeds were controlled early in the season.

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