Efficacy of glyphosate, alternative post-emergence herbicides and tillage for control of<i>Cynodon dactylon</i>

Campbell, P. L.

doi:10.1080/02571862.2008.10639920

Cited by 11 publications

(9 citation statements)

References 10 publications

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“…A detailed description of the trial is given in Campbell (2008a). In summary: The trial was started in December 2004 at La Mercy, KwaZulu-Natal (29 o 36'S, 31 o 6'E).…”

Section: Tillage Trialmentioning

confidence: 99%

“…The remainder of each plot was allowed to revert to normal species succession after treatment of the cynodon, in order to assess the requirements of follow-up control when comparing application of imazapyr with glyphosate (Campbell, 2008a).…”

Section: Tillage Trialmentioning

confidence: 99%

“…This paper aims to compare the two recording methods in a trial where herbicide treatments were applied to cynodon either with or without prior tillage (Campbell, 2008a).…”

Section: Introductionmentioning

confidence: 99%

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Image analysis to quantify herbicide efficacy forCynodon dactyloncontrol

Campbell

Smith

Sewpersad

et al. 2008

South African Journal of Plant and Soil

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“…A detailed description of the trial is given in Campbell (2008a). In summary: The trial was started in December 2004 at La Mercy, KwaZulu-Natal (29 o 36'S, 31 o 6'E).…”

Section: Tillage Trialmentioning

confidence: 99%

Section: Tillage Trialmentioning

confidence: 99%

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Image analysis to quantify herbicide efficacy forCynodon dactyloncontrol

Campbell

Smith

Sewpersad

et al. 2008

South African Journal of Plant and Soil

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“…In sugarcane, this is especially difficult, as a many of the weeds are also graminaceous species, e.g. Cynodon dactylon and Digitaria longifolia (Campbell 2008).…”

Section: Introductionmentioning

confidence: 99%

“…The application of herbicides is therefore a well-established necessity and is most crucial during plant cane establishment and subsequent ratoon crop regeneration (Campbell 2008). Herbicides must be carefully selected and applied as they disrupt essential processes (e.g.…”

Section: Introductionmentioning

confidence: 99%

Field and laboratory assessments of sugarcane mutants selected in vitro for resistance to imazapyr herbicide

Rutherford

Maphalala

Koch

et al. 2017

Crop Breed. Appl. Biotechnol.

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Seven imazapyr-tolerant mutant sugarcane plants, previously generated by in vitro mutagenesis, were studied. The imazapyr concentrations required to inhibit their acetolactate synthase (ALS basal activity) (IC 50 as μmoles acetoin h -1 mg -1 protein) were 0.77 -5.36 times greater than that of the N12 'parent'. The basal ALS activities of Mut1 and Mut6 were 1.4-fold higher than that of N12. When the mutants were sprayed with Arsenal ® GEN 2 (312 and 624 g a.i. imazapyr ha -1 ), 2 months after field planting, and evaluated 9 months later, live stalk height and number were significantly lowest in Mut2, Mut3 and the control N12. No differences in sucrose, fibre and estimated yield were observed amongst lines in untreated plots. Mutant plants germinated and grew in soil treated with the herbicide (at the lethal dose of 1248 g a.i. ha -1 ). The Mut lines tested in this study offer improved options for weed control.

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Agronomic evaluation and molecular characterisation of the acetolactate synthase gene in imazapyr tolerant sugarcane (Saccharum hybrid) genotypes

et al. 2018

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Mutagenesis had no effect on number of stalks/plot, stalk height, fibre and sucrose content of mutants. Imazapyr tolerance is likely due to a S622N mutation in the acetolactate synthase gene. The herbicidal compound imazapyr is effective against weeds such as Cynodon and Rottboellia species that constrain sugarcane production. This study aimed to compare agronomic characteristics of three imazapyr tolerant mutants (Mut 1, Mut 6 and Mut 7) with the non-mutated N12 control after 18 months of growth, and to sequence the acetolactate synthase (ALS) gene to identify any point mutations conferring imazapyr tolerance. There were no significant differences in the number of stalks/plot, stalk height, fibre and sucrose contents of the mutants compared with the N12 control. However, Mut 1 genotype was more susceptible to the Lepidopteran stalk borer, Eldana saccharina when compared with the non-mutated N12 (11.14 ± 1.37 and 3.89 ± 0.52% internodes bored, respectively), making Mut 1 less desirable for commercial cultivation. Molecular characterisation of the ALS gene revealed non-synonymous mutations in Mut 6. An A to G change at nucleotide position 1857 resulted in a N513D mutation, while a G to A change at nucleotide position 2184 imposed a S622N mutation. Molecular dynamics simulations revealed that the S622N mutation renders an asparagine side chain clash with imazapyr, hence this mutation is effective in conferring imazapyr tolerance.

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Efficacy of glyphosate, alternative post-emergence herbicides and tillage for control ofCynodon dactylon

Cited by 11 publications

References 10 publications

Image analysis to quantify herbicide efficacy forCynodon dactyloncontrol

Image analysis to quantify herbicide efficacy forCynodon dactyloncontrol

Field and laboratory assessments of sugarcane mutants selected in vitro for resistance to imazapyr herbicide

Agronomic evaluation and molecular characterisation of the acetolactate synthase gene in imazapyr tolerant sugarcane (Saccharum hybrid) genotypes

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