Dessecação Em Pré-Colheita No Potencial Fisiológico De Sementes E Desenvolvimento Inicial De Trigo

Tarumoto, Miriam Büchler; Carvalho, Fernando Tadeu de; Arf, Orivaldo; Silva, Pedro Henrique Favareto; Pereira, Juliana Costa; Bortolheiro, Fernanda Pacheco de Almeida Prado

doi:10.32929/2446-8355.2015v24n4p369-380

Cited by 5 publications

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“…(Table 4). Tarumoto et al (2015), using ammonium-glufosinate, glyphosate and paraquat in pre-harvest desiccation in wheat, did not find significant difference for root length, differing from the results found in the present study.…”

Section: (A) (B)contrasting

confidence: 99%

Physiological Quality of Carioca Bean Seeds Submitted to the Application of Desiccant Herbicides in Two Periods

et al. 2019

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The use of herbicides for bean crop desiccation aiming seed production, is an alternative management because it allows harvesting when the seeds present high vigor, germination and dry mass, however this technique can cause damages to the seeds. The objective of this study was to evaluate the physiological quality of bean seeds, of the Carioca type, with the application of desiccant herbicides doses at different periods, aiming at the anticipation of the harvest. The bean plants, Pérola cultivar, were desiccated when the seeds had 42 and 30% water content, with ammonium glufosinate, saflufenacil and diquat at doses of 0, 50, 75 and 100% in relation to the recommended average dose for desiccation, respectively for each of the herbicides. The control treatment without desiccant application was harvested on the same date as desiccation. The additional treatment, also without desiccant application, was harvested only when the seeds had a water content of 18%. The variables analyzed were germination, first germination count, germination speed index, cold test, accelerated aging, seedling and radicle length, and dry mass. The herbicides applied in the first period (42% water), at the highest doses, impair the physiological quality of the seeds, and the seeds with water contents of 30 and 42%, without the use of desiccants, promote high vigor and germination. Satisfactory results were obtained when the saflufenacil herbicide was applied in period 2 (30% water), using 50% of the recommended average dose of this herbicide.

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Section: (A) (B)contrasting

confidence: 99%

Physiological Quality of Carioca Bean Seeds Submitted to the Application of Desiccant Herbicides in Two Periods

et al. 2019

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“…Infere-se que o aumento das doses de glyphosate provoca efeitos mais severos nas sementes de sorgo. Tarumoto et al (2015) em estudos com trigo corroboram os resultados encontrados, indicando que não existe efeito na germinação das sementes em função das doses de paraquat. Por outro lado, Pinto et al (2016) indicam que a aplicação de até 1080 g i.a.…”

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Dessecação pré-colheita em sorgo granífero: qualidade fisiológica das sementes e efeito sobre a rebrota

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Freitas

et al. 2019

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AGRONOMIA (AGRONOMY) RESUMO: O uso de dessecantes em pré-colheita no sorgo pode tornar essa etapa no campo mais ágil e eficiente. Entretanto, a aplicação de herbicidas sobre a cultura oferece riscos à germinação e ao vigor das sementes. Neste contexto, objetivou-se avaliar o efeito de dessecantes sobre a antecipação da colheita, a qualidade fisiológica das sementes e controle da rebrota em sorgo granífero. O experimento foi conduzido em esquema fatorial (2 x 4) +1, sendo avaliados dois herbicidas glyphosate (Roundup original) e paraquat (Gramoxone 200) aplicados em quatro doses (0,5; 1,0; 2,0 e 4,0 L ha-1 do produto comercial) mais o tratamento controle (sem aplicação) no delineamento blocos casualizados. As características avaliadas foram: antecipação da colheita, primeira contagem de germinação, germinação, teor de água e condutividade elétrica das sementes e controle da rebrota da planta. O paraquat permite a antecipação da colheita em até 14 dias e quando aplicado nas doses de até 2,0 L ha-1 não prejudica a germinação das sementes e, por ser um herbicida de contato, não exerceu controle sobre a rebrota das plantas de sorgo. O glyphosate, por ser um herbicida sistêmico, exerce controle eficiente da rebrota do sorgo e possibilita a antecipação da colheita em até 12 dias.

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“…The degree of desiccation is related to the damage the herbicide causes to cell membranes, bringing about drying, leaf drop, and, simultaneously, water loss in seeds and low seed weight (Tarumoto et al, 2015). In the specific case of materials of indeterminate growth habit and lack of uniform maturation, such as 'BRS Guariba', this effect can be more intense, as observed for paraquat, for which the decline in SY values was approximately 46% compared to the control.…”

Section: Resultsmentioning

confidence: 99%

Cowpea yield and quality after application of desiccating herbicides

et al. 2020

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Abstract: The aim of this study was to evaluate the effects of pre-harvest desiccant herbicides on the yield and the physiological and technological quality of cowpea seeds after harvest and after storage. The experiment was conducted in a randomized block design with four replications. A split-plot design (6 × 2) was composed of the desiccant herbicides flumioxazin (30 g ai.ha-1), glufosinate ammonium (500 g ai.ha-1), paraquat (400 g ai.ha-1), saflufenacil (70 g ai.ha-1), and carfentrazone (24 g ai.ha-1) and an untreated control, as well as two seed evaluation periods, at harvest and six months after h arvest. Desiccants were applied at the R5 stage. The desiccants affected the yield, classification, color, and physiological quality of seeds of ‘BRS Guariba’. The glufosinate ammonium and paraquat herbicides compromised seed physiological quality. Flumioxazin did not affect seed yield components, color, and physiological quality. Storage at 20 °C for six months affected seed physiological quality.

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Dessecação Em Pré-Colheita No Potencial Fisiológico De Sementes E Desenvolvimento Inicial De Trigo

Cited by 5 publications

References 0 publications

Physiological Quality of Carioca Bean Seeds Submitted to the Application of Desiccant Herbicides in Two Periods

Physiological Quality of Carioca Bean Seeds Submitted to the Application of Desiccant Herbicides in Two Periods

Dessecação pré-colheita em sorgo granífero: qualidade fisiológica das sementes e efeito sobre a rebrota

Cowpea yield and quality after application of desiccating herbicides

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