Absorption, localisation, translocation and activity of glyphosate in barnyardgrass (Echinochloa crus-galli (L) Beauv): influence of herbicide and surfactant concentration

Kirkwood, R. C.; Hetherington, Richard; Reynolds, Tracey L.; Marshall, G.

doi:10.1002/(sici)1526-4998(200004)56:4<359::aid-ps145>3.0.co;2-s

Cited by 58 publications

(45 citation statements)

References 25 publications

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“…Absorption and translocation of glyphosate to the meristem of plants play an important role in the efficacy of this herbicide . A decrease in translocation has been considered as a glyphosate resistance mechanism in plants, although this mechanism does not occur in all resistant populations .…”

Section: Discussionmentioning

confidence: 99%

Temperature influences the level of glyphosate resistance in barnyardgrass (Echinochloa colona)

Nguyen

Malone

Boutsalis

et al. 2015

Pest Management Science

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Section: Discussionmentioning

confidence: 99%

Temperature influences the level of glyphosate resistance in barnyardgrass (Echinochloa colona)

Nguyen

Malone

Boutsalis

et al. 2015

Pest Management Science

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“…The most popular parameter derived from the Kautsky curve is that of maximum relative fluorescence [( F m − F 0 )/ F m ], which measures the relative magnitude of the fluorescence curve between the O and P steps (see Fig 1). This parameter is effective in providing a snapshot of the physiological status of a plant being exposed to various stress factors, and has been used to measure the effect of photosystem II (PSII) inhibitors 7, 17–19. Fluorescence has also been used for the study of herbicides with other modes of action than the inhibition of PSII 5, 16, 20.…”

Section: Introductionmentioning

confidence: 99%

Linking fluorescence induction curve and biomass in herbicide screening

Christensen¹,

Teicher

Streibig³

2003

Pest Management Science

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A suite of dose-response bioassays with white mustard (Sinapis alba L) and sugar beet (Beta vulgaris L) in the greenhouse and with three herbicides was used to analyse how the fluorescence induction curves (Kautsky curves) were affected by the herbicides. Bentazone, a photosystem II (PSII) inhibitor, completely blocked the normal fluorescence decay after the P-step. In contrast, fluorescence decay was still obvious for flurochloridone, a PDS inhibitor, and glyphosate, an EPSP inhibitor, which indicated that PSII inhibition was incomplete. From the numerous parameters that can be derived from OJIP-steps of the Kautsky curve the relative changes at the J-step [Fvj = (Fm - Fj)/Fm] was selected to be a common response parameter for the herbicides and yielded consistent dose-response relationships. Four hours after treatment, the response Fvj on the doses of bentazone and flurochloridone could be measured. For glyphosate, the changes of the Kautsky curve could similarly be detected 4 h after treatment in sugar beet, but only after 24 hs in S alba. The best prediction of biomass in relation to Fvj was found for bentazone. The experiments were conducted between May and August 2002 and showed that the ambient temperature and solar radiation in the greenhouse could affect dose-response relationships. If the Kautsky curve parameters should be used to predict the outcome of herbicide screening experiments in the greenhouse, where ambient radiation and temperature can only partly be controlled, it is imperative that the chosen fluorescence parameters can be used to predict accurately the resulting biomass used in classical bioassays.

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“…The same authors confirm that the application of glyphosate with various adjuvants, such as ammonium sulfate, x-77, Agri-dex, AN, Kinetic, urea, MSO to black nightshade (Solanum nigrum L.), wild mustard (Sinapis arvensis L.), large crabgrass and barnyard grass (Echinochloa crus-galli (L.) Beauv) significantly increased weed control compared to glyphosate alone [52]. Finally, Kirkwood et al [53] also mentioned that the incorporation of the surfactant MON 0818 had enhanced herbicidal activity, absorption, translocation and sink accumulation of glyphosate.…”

Section: Influence Of Surfactants On Glyphosate Efficacymentioning

confidence: 72%

Glyphosate Efficacy of Different Salt Formulations and Adjuvant Additives on Various Weeds

2017

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In many crops, weeds are managed by herbicides, mainly due to the decrease in crop yields and farmers' incomes caused by them. In general, chemical control of weeds is considered to be an easy, relatively cheap, and highly effective method. However, not all weeds can be successfully controlled, either because of their natural tolerance or their herbicide resistance. Glyphosate is one of the most widely used herbicides in the world. It can manage effectively a broad spectrum of weeds, and promotes conservation agriculture by significantly reducing conventional plough tillage. Unfortunately, its extensive use has led to the evolution of glyphosate resistance, which has evolved into a major problem for global crop production. Alternative herbicides are, in some cases, available, but they do not usually control certain weeds as efficiently as glyphosate. The transmission of herbicides to the target site is a complex process, and consists of several stages. Each herbicide is affected and can be manipulated by the product formulation for the optimization of its use. Many experiments have confirmed that different glyphosate salts and adjuvant additives are instrumental in the optimization of herbicide absorption and delivery processes. The objective of this paper is to provide a brief overview of these experiments and summarize the literature related to the effect of various glyphosate formulations and adjuvants on weed control. Determining the differences among formulations and adjuvants may lead to the further optimized long-term use of glyphosate.

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Absorption, localisation, translocation and activity of glyphosate in barnyardgrass (Echinochloa crus-galli (L) Beauv): influence of herbicide and surfactant concentration

Cited by 58 publications

References 25 publications

Temperature influences the level of glyphosate resistance in barnyardgrass (Echinochloa colona)

Temperature influences the level of glyphosate resistance in barnyardgrass (Echinochloa colona)

Linking fluorescence induction curve and biomass in herbicide screening

Glyphosate Efficacy of Different Salt Formulations and Adjuvant Additives on Various Weeds

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