Penetration, Translocation, and Metabolism of Acifluorfen in Soybean (Glycine max), Common Ragweed (Ambrosia artemisiifolia), and Common Cocklebur (Xanthium pensylvanicum)

Ritter, Ronald L.; Coble, Harold D.

doi:10.1017/s0043174500040029

Cited by 41 publications

(41 citation statements)

References 12 publications

(28 reference statements)

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“…Total 14 C absorbed by 72 HAT was 78, 76, and 95% at 4-, 8-, and 12-leaf growth stages, respectively. Overall, absorption of 14 Cflumioxazin in the current study was higher than previously reported by Higgins et al (1988) and Ritter and Coble (1981) for herbicides (lactofen and acifluorfen, respectively) with a similar mode of action. These differences may reflect differences in our application to the lower cotton stem vs. foliar application to soybean.…”

Section: Absorption and Translocationcontrasting

confidence: 59%

Physiological basis for cotton tolerance to flumioxazin applied postemergence directed

et al. 2004

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Previous research has shown that flumioxazin, a herbicide being developed as a postemergence-directed spray (PDS) in cotton, has the potential to injure cotton less than 30 cm tall if the herbicide contacts green stem tissue by rain splash or misapplication. In response to this concern, five-leaf cotton plants with chlorophyllous stems and older cotton, 16-leaf cotton plants, with bark on the lower stem were treated with a PDS containing flumioxazin plus crop oil concentrate (COC) or nonionic surfactant (NIS). Stems of treated plants and untreated plants at the respective growth stage were cross-sectioned and then magnified and photographed using bright-field microscopy techniques. More visible injury consisting of necrosis and desiccation was evident in younger cotton. Also, there was a decrease in treated-stem diameter and an increase in visible injury with COC compared with NIS in younger cotton. The effects of plant growth stage and harvest time on absorption, translocation, and metabolism of14C-flumioxazin in cotton were also investigated. Total14C absorbed at 72 h after treatment (HAT) was 77, 76, and 94% of applied at 4-, 8-, and 12-leaf growth stages, respectively. Cotton at the 12-leaf stage absorbed more14C within 48 HAT than was absorbed by four- or eight-leaf cotton by 72 HAT. A majority (31 to 57%) of applied14C remained in the treated stem for all growth stages and harvest times. Treated cotton stems at all growth stages and harvest times contained higher concentrations (Bq g−1) of14C than any other tissues. Flumioxazin metabolites made up less than 5% of the radioactivity found in the treated stem. Because of the undetectable levels of metabolites in other tissues when flumioxazin was applied PDS, flumioxazin was foliar applied to determine whether flumioxazin transported to the leaves may have been metabolized. In foliar-treated cotton, flumioxazin metabolites in the treated leaf of four-leaf cotton totaled 4% of the recovered14C 72 HAT. Flumioxazin metabolites in the treated leaf of 12-leaf cotton totaled 35% of the recovered14C 48 HAT. These data suggest that differential absorption, translocation, and metabolism at various growth stages, as well as the development of a bark layer, are the bases for differential tolerances of cotton to flumioxazin applied PDS.

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Section: Absorption and Translocationcontrasting

confidence: 59%

Physiological basis for cotton tolerance to flumioxazin applied postemergence directed

et al. 2004

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“…Herbicidas inibidores da PROTOX apresentam diferenças de absorção entre espécies de plantas, mas a translocação geralmente é limitada (Vanstone & Stobbe, 1978;Ritter & Coble, 1981;Higgins et al, 1998;Unland et al, 1999).…”

Section: Introductionunclassified

“…A tolerância de soja a acifluorfen foi explicada pela absorção e translocação menos rápidas e pelo metabolismo mais acentuado nessa espécie, em relação a A. artemisiifolia e Xanthium pensylvanicum (Ritter & Coble, 1981). A tolerância da soja a flumiclorac também se deve a um somatório da reduzida absorção e translocação e elevada detoxificação desse herbicida, ao passo que a tolerância de milho é devida à reduzida retenção foliar do herbicida e à sua elevada metabolização (Fausey & Renner, 2000).…”

Section: Introductionunclassified

Local de absorção de fomesafen como mecanismo de resistência em biótipo de Euphorbia heterophylla resistente aos inibidores da PROTOX

et al. 2009

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Palavras-chave: resistência de plantas daninhas, amendoim-bravo, fomesafen.ABSTRACT -Three trials were carried out to verify if the site of formesafen, absorption leaves or soil, affects the efficacy of controling this herbicide in wild poinsettia biotypes resistant and susceptible to the product; and to determine which plant structures are more important for fomesafen absorption. In the first two trials, fomesafen dose-response was evaluated on biotypes susceptible and resistant to PROTOX inhibitors, in the pre (first trial) and post emergence (second trial) applications. In a third trial, different deposition sites of fomesafen were evaluated using the double pot system to verify the structures of wild poinsettia plants which were most important to fomesafen absorption. Overall, the results indicated that shoot absorption of fomesafen was more limited on wild poinsettia biotypes with PROTOX resistance than on susceptible ones and that these differences between biotypes were less important when applied in pre-emergence. When applied to soil, fomesafen efficacy increased when the herbicide was placed near wild poinsettia shoots than close to their roots. These results support the hypothesis that leaf differences between resistant and susceptible plants may limit fomesafen absorption on biotypes resistant to PROTOX inhibitors.

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“…The lack of lactofen efficacy at the Lubbock location, especially when applied to taller Palmer amaranth, may be due to lower humidities found in that peanut growing area of the state. The phytotoxicity of POST herbicides depends on rate, temperature, relative humidity, light intensity, and rainfall (14). Environmental conditions prior to herbicide application also may alter plant susceptibility (17).…”

Section: Discussionmentioning

confidence: 99%

Controlling Weeds Found in Peanut with Lactofen

Grichar¹,

Dotray

2011

Crop Management

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Field studies were conducted from 2006 to 2008 in south Texas on peanut and in the Texas High Plains under fallow conditions to determine weed control using lactofen applied POST. At the High Plains location, under low humidity conditions, Palmer amaranth control decreased as weed size increased. Smellmelon control with lactofen in south Texas was influenced by weed length and surfactant. Adding a crop oil concentrate (Agridex) to lactofen resulted in at least 95% smellmelon control when applied to plants from 2 to 30 cm in length. Adding a non‐ionic surfactant (Induce) to lactofen resulted in 99% smellmelon control when applied to 2 to 5 cm long smellmelon and 82 to 87% control when applied to 15 to 30 cm long smellmelon. At the south Texas location, under high humidity conditions, Palmer amaranth control with lactofen was influenced by plant height but not as great as under the low humidity conditions of the High Plains. Peanut yield following lactofen application was greater than the untreated check regardless of application timing. Applying lactofen sequentially to 2,4‐DB improved buffalobur, Palmer amaranth, devil's‐claw, and puncturevine control over 2,4‐DB or lactofen alone at the High Plains location; however, Palmer amaranth, horse purslane, and smellmelon control in south Texas was not influenced as great by sequential lactofen applications.

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Penetration, Translocation, and Metabolism of Acifluorfen in Soybean (Glycine max), Common Ragweed (Ambrosia artemisiifolia), and Common Cocklebur (Xanthium pensylvanicum)

Cited by 41 publications

References 12 publications

Physiological basis for cotton tolerance to flumioxazin applied postemergence directed

Physiological basis for cotton tolerance to flumioxazin applied postemergence directed

Local de absorção de fomesafen como mecanismo de resistência em biótipo de Euphorbia heterophylla resistente aos inibidores da PROTOX

Controlling Weeds Found in Peanut with Lactofen

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