Effects of Chlormequat on Plant Height, Disease Development and Chemical Constituents of Cultivars of Barley, Oats, and Wheat

Clark, R. V.; Fedak, George

doi:10.4141/cjps77-005

Cited by 34 publications

(24 citation statements)

References 3 publications

(2 reference statements)

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“…The later applications would generally target the longer, upper internodes, thereby having a greater total effect on height reduction. The lack of a height or lodging response to chlormequat was in contrast to the findings of Clark and Fedak (1977) who indicated that applications of chlormequat to barley may reduce plant height and lodging. However, in the same study it was shown that any height or lodging response may be cultivar dependant.…”

Section: Plant Height and Lodgingcontrasting

confidence: 94%

“…Furthermore, no significant effects of chlormequat were observed on grain yield or any of the yield components. Based on the results of this study, chlormequat cannot be recommended as a lodging prevention tool for Puma, however, the responses could be cultivar specific (Clark & Fedak, 1977). Ethephon and the PGR combination were effective at reducing plant height and lodging, only when applied at the flag leaf stage, or as a split application.…”

Section: Discussionmentioning

confidence: 83%

“…The effects of PGR's on barley growth and development are highly variable and effects on yield and yield components, plant height and lodging, and nitrogen interactions have been well documented (Rajala & PeltonenSainio, 2000). Published literature indicates that PGR applications have consistently reduced plant height of barley plants (Clark & Fedak, 1977;Danhous et al, 1982;Simmons. et al, 1988;Foster e( al., 1991).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Use of ethephon and chlormequat chloride to manage plant height and lodging of irrigated barley (cv. Puma) when high rates of N-fertiliser are applied

Ramburan

Greenfield

2007

South African Journal of Plant and Soil

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Section: Plant Height and Lodgingcontrasting

confidence: 94%

Section: Discussionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Use of ethephon and chlormequat chloride to manage plant height and lodging of irrigated barley (cv. Puma) when high rates of N-fertiliser are applied

Ramburan

Greenfield

2007

South African Journal of Plant and Soil

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“…Tolbert (1960a, b) was the first to describe the effect of chlormequat chloride (CCC, chlormequat (2-chloroethyl)-trimethylammonium chloride) on growth and shoot elongation in wheat. In barley, CCC response was noted to vary and to be more genotype dependent (Clark and Fedak 1977). Other types of antigibberellins, like mepiquat chloride (1,1-Dimethylpiperidinium chloride), paclobutrazol (1-(4-chlorophenyl)-4,4dimethyl-2-(1H1,2,4-triazol-1-yl)pentan-3-ol)), and trinexapac-ethyl (ethyl-(3-oxido-4-cyclopropionyl-5-oxo) (Luckwill 1981, Herbert 1982, Rademacher 2000.…”

Section: Mode Of Action Of Plant Growth Regulatorsmentioning

confidence: 99%

“…Literature dealing with the oat stem elongation responses to PGRs indicates considerable stem shortening following treatment with compounds including chlormequat chloride, 2,3-dichloroisobutyric acid (DciB), ethephon and trinexapac-ethyl (Table 1) (Tennenhouse and Lacroix 1972, Clark and Fedak 1977, Gendy and Höfner 1989, Pietola et al 1999, Gans et al 2000, Peltonen-Sainio et al 2003, White et al 2003. CCC and ethephon applied to oat prior to onset of stem elongation resulted in similar short-term reduction in stem elongation of main shoot and T1 and T2 tillers (Peltonen-Sainio et al 2003).…”

Section: Lodging -Stem Lengthmentioning

confidence: 99%

Plant growth regulators to manipulate oat stands

Rajala¹

2008

AFSci

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Plant growth regulators (PGRs) are exogenously applied chemicals that alter plant metabolism, cell division, cell enlargement, growth and development by regulating plant hormones or other biological signals. For example, some PGRs regulate stem elongation by inhibiting biosynthesis of gibberellins or through releasing ethylene. PGR effects are widely studied and reported on barley (Hordeum vulgare L.) and wheat (Triticum aestivum L.), whereas there are only a few reports addressing oat (Avena sativa L.). This is likely to be a result of smaller acreage and lower intensity of oat management and production and hence a reduced need for stem shortening by PGRs. However, this is not the case for all cereal producing regions and there exists a need to understand the potential application of PGRs to oat production. This paper represents a review of the potential of PGRs to regulate stem elongation and other biological traits governing plant stand structure and yield components, with special emphasis on oat and its responses to PGRs. Yield improvement requires more heads per unit land area, more grains per head or heavier grains. Of these yield-determining parameters, the number of head bearing tillers and grain numbers per head, compared with grain weight, are more likely to be improved by PGR application. In the absence of lodging, PGR may reduce grain yield due to potential reduction in mean grain weight and/or grain number. Cultivation systems aiming at extensive yields with intensive use of inputs likely benefit from PGR applications more often compared with low or moderate input cultivation, for which cost effectiveness of PGRs is not frequently reached.

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Maximizing spring wheat productivity in the eastern Canadian Prairies: I. Yield, yield components, and lodging risk

et al. 2022

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Spring wheat (Triticum aestivum L.) yields across the Canadian prairies are rising, however, a yield gap remains between average yield and yield potential, which can be explored further under Prairie conditions. The high rates of nitrogen (N) fertilizer required for current high-yielding cultivars may increase lodging risk adding to this yield gap. The objectives of this study were to determine the influence of intensive management through N fertilization and plant growth regulator (PGR) application, on grain yield, yield components, and their relationships, in addition to lodging risk.Field trials were conducted at two locations in 2018 and 2019 in Manitoba, Canada, to evaluate three high-yielding spring wheat cultivars, three N management strategies, and the application of a PGR. Kernels per spike had the strongest overall linear relationship with grain yield (r 2 = .47), while the response of spikes per plant was highly related to yield response with alterations in N and PGR management practices (r 2 = .98). Splitting N fertilizer applications showed potential to reduce lodging risk of spring wheat, while maintaining yield and increasing protein. The PGR applications reduced lodging and increased grain yield by 91 kg ha −1 mainly through increases in kernels per spike. To achieve consistent yield increases, management practices should maximize early season N availability to target increases in spikes per plant and kernels per spike, thus a PGR application may be required to balance increased lodging risk. INTRODUCTIONWheat (Triticum aestivum L.) accounts for approximately 35% of the total Canadian cropland in annual production each year Abbreviations: CCC, chlormequat chloride; CNHR,

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Effects of Chlormequat on Plant Height, Disease Development and Chemical Constituents of Cultivars of Barley, Oats, and Wheat

Abstract: Crnnr, R. V. nNo FBoer, G. 1977 . Effects

Cited by 34 publications

References 3 publications

Use of ethephon and chlormequat chloride to manage plant height and lodging of irrigated barley (cv. Puma) when high rates of N-fertiliser are applied

Use of ethephon and chlormequat chloride to manage plant height and lodging of irrigated barley (cv. Puma) when high rates of N-fertiliser are applied

Plant growth regulators to manipulate oat stands

Maximizing spring wheat productivity in the eastern Canadian Prairies: I. Yield, yield components, and lodging risk

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