Absorption, Translocation, and Metabolism of AC 252 214 in Soybean (Glycine max), Common Cocklebur (Xanthium strumarium), and Velvetleaf (Abutilon theophrasti)

Weed Science ◽  
1985 ◽  
Vol 33 (4) ◽  
pp. 469-471 ◽  
Author(s):  
Dale L. Shaner ◽  
Patricia A. Robson

The herbicide AC 252 214 {2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl] 3-quinoline-carboxylic acid} was absorbed by the roots and foliage of soybean [Glycine max (L.) Merr. ‘Williams’], common cocklebur (Xanthium strumarium L. ♯ XANST), and velvetleaf (Abutilon theophrasti Medic. ♯ ABUTH), and then translocated in the xylem and phloem to meristematic regions. AC 252 214 was metabolized rapidly by soybean and velvetleaf but appeared to be metabolized slowly by cocklebur. The order of tolerance of these three species to AC 252 214 was soybeans > velvetleaf > cocklebur. This order of tolerance was directly correlated in young plants with the half-life of AC 252 214 within the tissue. Velvetleaf exhibited increased tolerance to AC 252 214 with age, which was attributed partially to greatly reduced absorption of the herbicide by older leaves and more rapid metabolism of the herbicide.

Weed Science ◽  
1986 ◽  
Vol 34 (2) ◽  
pp. 256-259 ◽  
Author(s):  
Barbara M. Biniak ◽  
Richard J. Aldrich

The potential of preventing seed production and reducing seed viability of weeds that commonly grow taller than soybeans [Glycine max(L.) Merr. ‘Williams 82’] was evaluated. Chlorflurenol (2-chloro-9-hydroxy-9H-fluorene-9-carboxylic acid), chlorsulfuron {2-chloro-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino] carbonyl] benzenesulfonamide}, and glyphosate [N-(phosphonomethyl)glycine] were evaluated against sparse stands of velvetleaf (Abutilon theophrastiMedik. # ABUTH) and giant foxtail (Setaria faberiHerrm. # SETFA) growing in soybeans. Simulated-roller applications of all three herbicides significantly reduced seed production and germination of both weeds, although glyphosate was more effective than were the other two. Applications during early flowering of velvetleaf and early heading of giant foxtail reduced seed production more than later applications when some seeds were present. With the early application of glyphosate, 99% prevention of velvetleaf and 96% prevention of giant foxtail seed production were attained. With the early glyphosate application, germination of seeds produced was reduced by 50% in velvetleaf and by 95% in giant foxtail. Soybean yields were not reduced by either glyphosate or chlorflurenol but were drastically reduced by chlorsulfuron.


Weed Science ◽  
1988 ◽  
Vol 36 (1) ◽  
pp. 5-8 ◽  
Author(s):  
John W. Wilcut ◽  
Glenn R. Wehtje ◽  
Michael G. Patterson ◽  
Tracy A. Cole

Absorption of foliar-applied14C-imazaquin {2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3-quinolinecarboxylic acid} 72 h after treatment was higher than 90% for soybean [Glycine max(L.) Merr. ‘Braxton’], peanut (Arachis hypogaeaL. ‘Florunner’), common cocklebur (Xanthium strumariumL. # XANST), sicklepod (Cassia obtusifoliaL. # CASOB), and Florida beggarweed [Desmodium tortuosum(SW.) # DEDTO]. Both symplasmic and apoplasmic translocation of the herbicide were evident. Imazaquin half-life was 4.4 days in soybean, 5.3 days in peanut, 9.6 days in Florida beggarweed, 12.7 days in sicklepod, and 39.8 days in cocklebur. Tolerance of these species to foliar-applied imazaquin as determined in greenhouse studies with 21-day-old seedlings was as follows: soybean = peanut > Florida beggarweed > sicklepod > cocklebur. Tolerance was directly correlated to imazaquin halflife within the tissue of the respective species.


2016 ◽  
Vol 28 (6) ◽  
pp. 1177-1180
Author(s):  
Taruna Yadav ◽  
Neelam K. Yadav ◽  
Manju Yadav ◽  
Bhawani Singh ◽  
D. Kishore

Weed Science ◽  
1987 ◽  
Vol 35 (2) ◽  
pp. 237-242 ◽  
Author(s):  
Chester G. McWhorter ◽  
Gene D. Wills ◽  
Robert D. Wauchope

Foliar applications of14C-bentazon [3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide] with PPA (polymeric polyhydroxy acid) at 1 or 2% (v/v) or nonoxynol (9.5 POE) [α-(p-nonylpheny1)-ω-hydroxypoly(oxyethylene)] at 1% (v/v) or mixtures of PPA and nonoxynol did not increase absorption or translocation of14C-bentazon in soybeans [Glycine max(L.) Merr. ‘Lee 74′] or common cocklebur (Xanthium strumariumL. # XANST). PPA alone at 1 to 2% (v/v) did not significantly affect absorption or translocation of14C-bentazon in smooth pigweed (Amaranthus hybridusL. # AMACH), but PPA with nonoxynol significantly increased translocation out of the treated leaf. Both PPA and nonoxynol decreased absorption and movement of14C-MSMA [monosodium salt of methylarsonic acid] out of the treated leaf of johnsongrass [Sorghum halepense(L.) Pers. # SORHA]. In greenhouse research, PPA at 0.25 and 0.5% (v/v) did not increase the level of control of common cocklebur obtained following postemergence applications of bentazon at 0.24 and 0.48 kg ai/ha. Similarly, PPA at 0.25 and 0.50% (v/v) did not increase the toxicity of MSMA at 0.3 and 0.6 kg ai/ha to either johnsongrass or common cocklebur.


The Prostate ◽  
1983 ◽  
Vol 4 (4) ◽  
pp. 407-414 ◽  
Author(s):  
Klaus M.-E. Jensen ◽  
Paul O. Madsen

Weed Science ◽  
1978 ◽  
Vol 26 (1) ◽  
pp. 76-81 ◽  
Author(s):  
G. R. Leather ◽  
C. L. Foy

The uptake and distribution of14C-bifenox [methyl 5-(2,4-dichlorophenoxy)-2-nitrobenzoate] was different among corn(Zea maysL.), soybean(Glycine max(L.) Merr.) and velvetleaf(Abutilon theophrastiMedic.) following preemergence application to a greenhouse soil mix. Autoradiographs of seedlings harvested 14 days after treatment, showed the14C to be in (or on) those areas of the crop plant in contact with the treated soil. Velvetleaf translocated14C residue throughout the shoot. Absorption of14C-compound(s) from treated nutrient solution accumulated in the roots of the three species but to a greater extent in soybean. There was no difference in the concentration of14C in the shoots. However, in corn and soybean the14C-compound(s) was confined to the primary and secondary leaf veins while velvetleaf showed a general distribution throughout the leaf tissue. Velvetleaf absorbed and translocated bifenox from shoot zones to a greater extent than the crop plants. Some acropetal movement was noted following leaf application to corn and velvetleaf but movement was only 3% of applied14C from the treated leaf. No movement was detected in soybean.


Weed Science ◽  
1984 ◽  
Vol 32 (5) ◽  
pp. 691-696 ◽  
Author(s):  
Barbara J. Hook ◽  
Scott Glenn

The penetration, translocation, and metabolism of acifluorfen {5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acid} in ivyleaf morningglory [Ipomoea hederacea(L.) Jacq. ♯3IPOHE], velvetleaf (Abutilon theophrastiMedic. ♯ ABUTH), common cocklebur (Xanthium pensylvanicumWallr. ♯ XANPE), and soybean [Glycine max(L.) Merr.] were studied. An application to plants of 0.3 kg ai/ha mefluidide {N-[2,4-dimethyl-5-[[(trifluoromethyl)sulfonyl] amino] phenyl] acetamide} 0, 3, 5, or 7 days prior to treatment with14C-acifluorfen often altered one or more of the physiological processes under study. Pretreatment of ivyleaf morningglory with mefluidide 3, 5, or 7 days prior to application of14C-acifluorfen increased penetration of14C and decreased metabolism of acifluorfen, while translocation was unaffected. All mefluidide treatments increased penetration of14C-acifluorfen into velvetleaf, while the 3-, 5-, and 7-day pretreatments decreased acifluorfen metabolism. Penetration of acifluorfen into common cocklebur was unaffected by pretreatment with mefluidide. However, the 7-day mefluidide pretreatment of common cocklebur increased translocation of14C into the upper leaves and decreased acifluorfen metabolism. Penetration and translocation of the radiolabel from14C-acifluorfen in soybean was unaffected by pretreatment with mefluidide. Metabolism of acifluorfen by soybean was decreased by the 0-day mefluidide treatment but was unaffected by the 3-, 5-, or 7-day mefluidide pretreatment.


Weed Science ◽  
1989 ◽  
Vol 37 (5) ◽  
pp. 639-644 ◽  
Author(s):  
Tracy A. Cole ◽  
Glenn R. Wehtje ◽  
John W. Wilcut ◽  
T. Vint Hicks

Imazethapyr was applied at 0.14 kg ae/ha to soybean, peanut, sicklepod. Florida beggarweed, and redroot pigweed as either a soil, foliar, or soil plus foliar application. Soybean and peanut were the most tolerant species; redroot pigweed was the most sensitive, with sicklepod and Florida beggarweed being intermediate. Foliar or foliar plus soil applications were more effective in reducing sicklepod and Florida beggarweed fresh weights than soil application alone. Foliar absorption of14C-imazethapyr 72 h after treatment was greater than 90% for soybean, peanut, sicklepod, and redroot pigweed, but only 77% in Florida beggarweed. For the species evaluated, the amount translocated from the treated leaf ranged from 5 to 16% after 72 h. Within this same time period, an average of 90% of the root-absorbed imazethapyr had been translocated to the shoot in all species except peanut. The half-life of imazethapyr was 6.6, 6.5, 14.4, 24.0, and 32.1 days in soybean, peanut, Florida beggarweed, sicklepod, and redroot pigweed, respectively. Tolerance was most closely associated with imazethapyr half-life within these species.


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