A new diphenyl ether for weed control in field brassica crops

Mason, C.W.; Brooker, E.C.

doi:10.30843/nzpp.1968.21.10510

Cited by 2 publications

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“…Nitrofen was one of the first diphenyl ether herbicides re ported to be useful for selective weed control in both tropical and temperate regions. This herbicide has been used both preand postemergence in such crops as rice (Oryza sativa L.) (8), onion (Allium cepa L.) (5,6), several Brassica crops (4,6,7,10), carrots (Daucus carota L.), celery (Apium graveolens L.) and horseradish (Armoracia lapathifolia Gilib.) (6).…”

Section: Introductionmentioning

confidence: 99%

Differential Activity of Three Diphenyl Ether Herbicides

Fadayomi¹,

Warren²

1977

Weed sci.

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The tolerance of four legume species to nitrofen (2,4-dichloro-phenyl-p-nitrophenyl ether), fluorodifen (p-nitrophenylα,α,α-trifluoro-2-nitro-p-tolyl ether), and oxyfluorofen [2-chloro-1-(3-ethoxy-4-nitro-phenoxy)-4-(trifluoro-methyl)benzene] was investigated both pre- and postemergence in the greenhouse. Seedlings of species that emerged most rapidly seemed to be most tolerant to preemergence herbicide applications. There was no direct relationship between preemergence and postemergence tolerance. Oxyfluorfen was found to be at least 10 times as active as the other two herbicides both pre- and postemergence. Field experiments were conducted at two locations in Indiana to test the effect of method of application on the activity and selectivity of fluorodifen and oxyfluorfen on soybean [Glycine max(L.) Merr. ‘Wayne’] and greenbean (Phaseolus vulgarisL. ‘Spartan Arrow’). Crop injury and grass weed control were reduced by incorporation of the herbicides 8 cm deep in a silt loam. Method of application did not affect the activity of the herbicides on a sandy soil low in organic matter. Soybean was more tolerant than greenbean to both herbicides when applied preemergence but oxyfluorfen was far more active than fluorodifen on both crops.

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Section: Introductionmentioning

confidence: 99%

Differential Activity of Three Diphenyl Ether Herbicides

Fadayomi¹,

Warren²

1977

Weed sci.

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“…S UBSTITUTED diphenylethers have been evaluated exten sively in Japan as herbicides used preemergence to control weeds in transplanted rice (Oryza sativa L.) (12,13). Considerable tolerance to certain of the substituted diphenylethers also was reported for various Brassicaceous and certain other crops (11). Most of the better diphenyl ethers tested to date contain a ^-nitro substituent on one phenyl ring and have been separated into two groups by Matsunaka (12,13).…”

Section: Introductionmentioning

confidence: 99%

Effects of Diphenylether Herbicides on Reactions of Mitochondria and Chloroplasts

et al. 1970

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Effects of three diphenylether herbicides [2,4-dichlorophenyl-p-nitrophenyl ether (nitrofen); 2,4,6-trichlorophenyl-4′-nitrophenyl ether (hereinafter referred to as MC-1478); and 2,4′-dinitro-4-trifluoromethyl-diphenylether (hereinafter referred to as C-6989)] were measured on phosphorylation and electron transport in spinach(Spinacia oleraceaL.) chloroplasts, and mung bean(Phaseolus aureusL., var. Jumbo) and white potato tuber(Solarium tuberosumL.) mitochondria. All of the diphenylethers acted primarily as inhibitors of chloroplast noncyclic electron transport, and the coupled photophosphorylation. The compounds ranked in the following decreasing order of inhibitory effectiveness: MC-1478 ≥ C-6989 >> nitrofen. A site of action close to light reaction II was suggested. At high molar concentrations, marginal interference with cyclic electron transport or phosphorylation was obtained. In mitochondria, MC-1478 and nitrofen acted primarily as electron transport inhibitors with malate, NADH, and succinate as substrates. MC-1478 was a slightly stronger inhibitor than nitrofen. Only slight stimulation of ADP-limited oxygen uptake was obtained during the oxidation of NADH and succinate; whereas, strong inhibition of oxygen uptake was obtained with malate. C-6989 also weakly stimulated ADP-limited oxygen uptake with NADH and succinate but differed from the two chlorinated diphenylethers in that electron transport was not inhibited when ADP was present in excess. Interference with ATP generation could be one of the mechanisms through which the phytotoxicity of diphenylether herbicides is expressed.

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A new diphenyl ether for weed control in field brassica crops

Cited by 2 publications

References 0 publications

Differential Activity of Three Diphenyl Ether Herbicides

Differential Activity of Three Diphenyl Ether Herbicides

Effects of Diphenylether Herbicides on Reactions of Mitochondria and Chloroplasts

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