Effects of Harvest-Aid Herbicides on Soybean (<i>Glycine max</i>) Seed Yield and Quality

Ratnayake, Sunil; Shaw, David R.

doi:10.1017/s0890037x00034837

Cited by 44 publications

(67 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Producers often facilitate harvest by applying desiccants or harvest aids to accelerate the rate and uniformity of crop and weed dry down because of indeterminate crop growth and variable field and weather conditions (Hole and Hardwick 1978;Wilson and Smith 2002). In order to minimize herbicide residues in dry bean seed and maintain yield and seed quality it is important that desiccants are applied at the appropriate crop maturity (Azlin and McWhorter 1981;Ratnayake and Shaw 1992;Cessna et al 1994).…”

mentioning

confidence: 99%

Effect of application timing of glyphosate and saflufenacil as desiccants in dry edible bean (Phaseolus vulgaris L.)

et al. 2015

View full text Add to dashboard Cite

. 2015. Effect of application timing of glyphosate and saflufenacil as desiccants in dry edible bean (Phaseolus vulgaris L.). Can. J. Plant Sci. 95: 369Á375. Early application of desiccants in dry edible bean may cause yield reductions and unacceptable herbicide residue levels, resulting in rejection of exported shipments. The effect of application timing of two registered desiccants, glyphosate and saflufenacil, was examined in 12 field trials conducted over a 4-yr period (2009Á2012) at Exeter, Ontario, Carman, Manitoba, and Lethbridge, Alberta. Desiccants were applied alone and in combination at five crop maturation stages. When glyphosate or saflufenacil alone, or in combination, was applied at 100% crop maturity, herbicide residue levels were acceptable (less than 2.0 and 0.01 ppm for glyphosate and saflufenacil, respectively) and there was no reduction in yield or hundred seed weight. Glyphosate residues remained below 2.0 ppm when the desiccant was applied alone or with saflufenacil at 75% crop maturity, but crop yield decreased by 16% compared with the untreated control when glyphosate and saflufenacil were combined. Residue levels were unacceptable when glyphosate was applied at 0, 25, and 50% maturity; generally the earlier glyphosate was applied, the greater the residue concentration in the seeds at harvest. Although no application timing resulted in saflufenacil residues above 0.01 ppm, crop yield was reduced when the desiccant was applied at 0, 25, 50, and 75% crop maturity. This information will provide dry bean processors with the necessary information to design guidelines concerning the application timing of glyphosate and saflufenacil so that bean yield and quality remain unaffected and seed residues remain below accepted levels.Key words: Desiccation, dry edible bean, harvest aid, maximum residue level, Phaseolus vulgaris L.McNaughton, K. E., Blackshaw, R. E., Waddell, K. A., Gulden, R. H., Sikkema, P. H. et Gillard, C. L. 2015. Conse´quences du moment de l'application du glyphosate et du saflufenacil employe´s comme agents de dessiccation avec le haricot (Phaseolus vulgaris L.). Can. J. Plant Sci. 95: 369Á375. L'application haˆtive d'agents de dessiccation au haricot peut donner lieu a`des pertes de rendement et a`une concentration inacceptable de re´sidus d'herbicide, puis, par voie de conse´quence, entraıˆner le rejet des lots de haricot sec exporte´s. Les auteurs ont examine´les conse´quences du moment d'application du glyphosate et du saflufenacil, deux agents de dessiccation homologue´s, lors de douze essais au champ re´alise´s au cours d'une pe´riode de quatre ans (2009Á2012) a`Exeter (Ontario), a`Carman (Manitoba) et a`Lethbridge (Alberta). Les agents ont e´te´applique´s seuls ou combine´s a`cinq stades de maturation de la culture. Quand on applique le glyphosate, le saflufenacil ou les deux au moment ou`la culture a atteint 100 % de sa maturite´, la concentration de re´sidus d'herbicide est acceptable (moins de 2,0 et de 0,01 ppm respectivement pour le glyphosate et le saflufenacil) et ...

show abstract

mentioning

confidence: 99%

Effect of application timing of glyphosate and saflufenacil as desiccants in dry edible bean (Phaseolus vulgaris L.)

et al. 2015

View full text Add to dashboard Cite

show abstract

“…However, glyphosate reduced seed germination and vigour when applied during the seed development of such diverse crops as sorghum [Sorghum bicolor (L.) Moench], perennial ryegrass (Lolium perenne L.), and soybeans (Glycine max Merr.) (Baur et al 1977;Hampton and Hebblethwaithe 1982;Ratnayake and Shaw 1992). Due to the importance of seed quality to marketing, more data on the effects of preharvest glyphosate on alfalfa seed quality on the Canadian prairies are needed.…”

mentioning

confidence: 99%

Preharvest glyphosate in alfalfa for seed production: Effect on alfalfa seed yield and quality

May¹,

Loeppky²,

Murrell³

et al. 2003

Can. J. Plant Sci.

View full text Add to dashboard Cite

. 2003. Preharvest glyphosate in alfalfa for seed production. Effect on alfalfa seed yield and quality. Can J. Plant Sci. 83: [189][190][191][192][193][194][195][196][197]. Preharvest applications of glyphosate have been shown to be effective in controlling Canada thistle in annual crops, but may reduce alfalfa seed yield depending on time and rate of application. The objective of this study was to determine the effect of preharvest applications of glyphosate on subsequent alfalfa seed yield and quality. The effects of timing, 1, 26, 51 and 76% alfalfa seed pod maturity, and rate, 0, 440, 880, 1320, and 1760 g a.i. ha -1 , of a preharvest application of glyphosate on alfalfa seed yield and quality in the year of application, and regrowth and seed yield in the following year were determined. The rate of glyphosate applied did not affect seed yield in the application year; however, in the following year, growth and seed yield were reduced as rates increased. Delaying the application of glyphosate increased seed yields in the application year, but decreased alfalfa regrowth and flowering the following year. Germination and seedling emergence were not affected by the rate or timing of the glyphosate. A preharvest application of glyphosate at 1760 g a.i. ha -1 at 76% pod maturity is a viable option in the last year of seed production. [189][190][191][192][193][194][195][196][197]. L'application de glyphosate avant la récolte semble donner de bons résultats dans la lutte contre le chardon des champs pour les cultures annuelles, mais cette méthode pourrait réduire le rendement grainier de la luzerne, selon le taux d'application et le moment du traitement. L'étude devait établir l'incidence de l'application de glyphosate avant la récolte sur le rendement grainier et la qualité des semences de la luzerne. Les auteurs ont déterminé les effets du moment du traitement (à 1, 26, 51 et 76 % de maturité des gousses) et du taux d'application (0, 440, 880, 1 320 et 1 760 g de matière active par hectare) sur le rendement grainier et la qualité des semences de la luzerne l'année du traitement ainsi que leurs effets sur la repousse et le rendement grainier l'année suivante. Le taux d'application n'agit pas sur le rendement grainier l'année du traitement, mais l'année suivante, la croissance et le rendement grainier diminuent avec la hausse du taux d'application. Quand on retarde l'application du glyphosate, le rendement grainier augmente l'année du traitement, mais la repousse et la floraison sont plus faibles l'année suivante. La germination et le taux de levée ne sont pas affectés par le taux d'application ni par le moment du traitement. L'application de 1 760 g de glyphosate par hectare avant la récolte, lorsque 76 % des gousses sont parvenues à maturité, est une solution envisageable la dernière année de récolte des graines.

show abstract

“…As constatações verificadas assemelham-se aos dados encontrados por Ratnayake & Shaw (1992), que referiram redução na emergência de plântulas normais de Cassia obtusifolia L., quando plantas-mãe foram aspergidas pela imidazolinona AC 263.222, no início do desenvolvimento das sementes. As causas seriam conseqüência da inibição da enzima ALS envolvida na síntese dos aminoácidos valina, leucina e isoleucina (Shaner et al, 1984).…”

Section: Resultsunclassified

Efeitos de herbicidas aplicados no período reprodutivo sobre o crescimento inicial de plantas daninhas na geração seguinte

Andrés

Flecks

1994

Planta daninha

View full text Add to dashboard Cite

Em 1990, 91 e 92 foi conduzido experimento na Faculdade de Agronomia da UFRS, em Porto Alegre, RS, com o obj etivo de avaliar os efeito s de herbic idas asp ergido s durante a fase reprodutiva em balãozinho (Cardiospermum halicacabum), corriola (Ipomoea grandifolia) e quinquilho (Datura stramonium). Foram testados dois compostos imidazolinonas (imazaquin e imazethapyr) e duas sulfoniluréias (chlorimuron e metsulfuron), e avaliadas as áreas foliar e cotiledonar, estatura e matéria seca das plântulas da geração seguinte. Em quinquilho, as áreas foliar e cotiledonar das plântulas aspergidas não diferiram da testemunha. Já as estaturas de balãozinho e quinquilho foram afetadas pelos her bicidas: em quinquilho, especialmente por clorimuron; em balãozinho, além de clorimuron, também por metsulfuron. Diversos tratamentos afetaram a matéria seca total ou de segmentos de plântulas de quinquilho. Em corriola não se constataram efeitos dos tratamentos herbicidas nas variáveis avaliadas. De modo geral, as características de plântulas da geração seguinte foram afetadas por alguns herbicidas aplicados na fase reprodutiva, como matéria seca em quinquilho e estatura em balãozinho, dependendo do produto, dose e época de aplicação.Palavras-chave: Características reprodutivas, imidazolinonas, sulfoniluréias, aplicações tardias. ABSTRACT Effects of herbicides applied during reproductive period on initial growth of weed seedlings of the next generationA trial was conducted in 1990, 91 and 92 at Federal University of Rio Grande do Sul, in Porto Alegre, RS, Brazil, to investigate the effects of herbicides sprayed during the reproductive period of balloonvine (Cardiospermum halicacabum), morningglory (Ipomoea grandifolia), and jimsonweed (Datura stramonium). Two imidazolinones (imazaquin and imazethapyr) and two sulfonylureas (chlorimuron and metsulfuron) were tested and evaluated on foliar and cotyledonar areas, plant height, and dry matter of weed seedlings. In jimsonweed, foliar and cotyledonar areas of seedlings did not differ from the control. However, the heights of ballonvine and jimsonweed seedlings were affected by the herbicides: in jimsonweed specially by chlorimuron, in baloonvine by chlorimuron, and metsulfuron. Multiple treatment influenced total plant dry matter and also dry matter of some components of jimsonweed plants. In morningglory no effects of herbicide treatment on the traits evaluated were observed. In general, characteristics of seedlings of the next generation were influenced by some herbicides applied during the reproductive period of the mother plants, for example dry matter in jimsonweed and height in baloonvine, depending on the compound and rate used and its time of application.Addit ional index words : Rep rod uct ive chara cteristics, imidazolinones, sulfonylureas, late applications, seedlings. 1Rece bido para publicação em 04/01/94 e na forma revisado em 13/08/94. Extraído da dissertação do pri meiro autor para obtenção do grau de Mestre em Fitotecnia pela Faculdade de Agronomia da UFRS. Parcialmente ...

show abstract

Effects of Harvest-Aid Herbicides on Soybean (Glycine max) Seed Yield and Quality

Cited by 44 publications

References 13 publications

Effect of application timing of glyphosate and saflufenacil as desiccants in dry edible bean (Phaseolus vulgaris L.)

Effect of application timing of glyphosate and saflufenacil as desiccants in dry edible bean (Phaseolus vulgaris L.)

Preharvest glyphosate in alfalfa for seed production: Effect on alfalfa seed yield and quality

Efeitos de herbicidas aplicados no período reprodutivo sobre o crescimento inicial de plantas daninhas na geração seguinte

Contact Info

Product

Resources

About