Root Uptake, Translocation, and Metabolism of Nitrofluorfen and Oxyfluorfen by Fababeans(Vicia faba)and Green Foxtail(Setaria viridis)

Abstract

Root uptake and translocation of nitrofluorfen [2-chloro-1-(4-nitrophenoxy)-4-(trifluoromethyl)benzene] and oxyfluorfen [2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl)benzene] were measured in fababean(Vicia fabaL.) and green foxtail [Setaria viridis(L.) Beauv.] plants, and metabolism was studied using fababean leaf discs and green foxtail leaf segments. Both herbicides were taken up readily from nutrient solution but translocation was limited. In fababeans, 4.6% of the nitrofluorfen label was translocated to the shoot as compared to 2.2% of the oxyfluorfen label. Less than 10% of the nitrofluorfen or oxyfluorfen taken up in vitro was metabolized after 24 h. This rate of metabolism would not likely influence the herbicidal action of either herbicide.

Fate of acifluorfen and lactofen in common waterhemp (Amaranthus rudis) resistant to protoporphyrinogen oxidase–inhibiting herbicides

“…Greater than 90% of applied herbicide was located within 3.5 mm of the original herbicide droplet center. These results are in agreement with earlier research that showed little translocation of protox-inhibiting herbicides in plants (Higgins et al 1988;Ritter and Coble 1981;Unland et al 1999;Vanstone and Stobbe 1978).…”

“…Protox-inhibiting herbicides have a wide range of absorption among different plant species, but translocation generally is limited (Higgins et al 1988;Ritter and Coble 1981;Unland et al 1999;Vanstone and Stobbe 1978). Although small differences in absorption and translocation may occur among plants, they may explain the different amounts of tolerance to protox-inhibiting herbicides (Ritter and Coble 1981).…”

Glyphosate efficacy, absorption and translocation for Eragrostis plana control

“…Fluazifop-pbutyl and flumioxazin applied by themselves were not Adv Weed Sci. 2022;40:e020220025 https://doi.org/10.51694/AdvWeedSci/2022;40:00017 inhibitors have differential absorption by weeds, but in general, their translocation is limited (Vanstone, Stobbe, 1978;Ritter, Coble, 1981;Higgins et al, 1998;Unland et al, 1999). Glyphosate isolated showed less total absorption and translocation than when mixed with fluazifop-p-butyl or flumioxazin.…”

Eficacia de herbicidas preemergentes en el control de Oryza latifolia Desv. (arroz pato)

“…En Costa Rica, en fincas comerciales de arroz, se ha observado que los productores, luego de aplicar oxifluorfen, esperan entre dos y tres semanas para sembrar las variedades de arroz (Garita, I., comunicación personal, 15 de junio, 2020) y el efecto de este herbicida en el cultivo es menor que la atrazina, debido a que es poco móvil en el suelo y desde hace años se conoce que se absorbe poco por la raíz (Vanstone & Stobbe, 1978). Además, el arroz al emerger del suelo tiene la plúmula envuelta por el coleóptilo que le da una forma de aguja que le confiere poca superficie de contacto de las hojas con la película del herbicida.…”