Seletividade E Eficácia De Herbicidas Para O Controle De Plantas Daninhas Na Mandioca

Fontes, José Roberto; Oliveira, Inocencio; Morais, Ronaldo

doi:10.21757/0103-3816-2021v33n1p69-78

Cited by 1 publication

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…40 With the action of PROTOXinhibiting herbicides, the accumulation of protoporphyrin IX in the cytosol occurs. 67 In general, all the herbicides used in this experiment alter the photosynthetic mechanism by acting on the transport of electrons in the photochemical phase or on the formation of essential photosynthetic pigments.…”

Section: Resultsmentioning

confidence: 99%

“…In contrast, flumioxazin and carfentrazone act by inhibiting the enzyme protoporphyrinogen oxidase (PROTOX), which is involved in chlorophyll biosynthesis by catalyzing the oxidation of protoporphyrinogen IX to protoporphyrin IX . With the action of PROTOX-inhibiting herbicides, the accumulation of protoporphyrin IX in the cytosol occurs . In general, all the herbicides used in this experiment alter the photosynthetic mechanism by acting on the transport of electrons in the photochemical phase or on the formation of essential photosynthetic pigments.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Chemical Desiccation in the Preharvest of Cowpea: A Study of How the Time of Application Interferes in the Enzymatic and Physiological Aspects of Seedlings from Desiccated Plants

Coêlho,

Everthon da Silva Ribeiro,

Oliveira

et al. 2024

ACS Omega

View full text Add to dashboard Cite

Chemical desiccation in the preharvest of grains and seeds is commonly used in production fields. Using herbicides for this purpose is a viable alternative to reduce beans' exposure to adverse crop conditions. Our objectives were to evaluate (1) the efficacy of herbicides for accelerated defoliation of cowpea, (2) the impact of herbicide application on antioxidant enzyme activity and protein and amino acid contents in seeds, and (3) the effects of different herbicide application schedules on the physiological aspects of seeds. In the first experiment, in addition to the control treatment (without herbicides), seven herbicides and two mixtures were applied at night: diquat, flumioxazin, diquat + flumioxazin, glufosinate ammonium, saflufenacil, carfentrazone, diquat + carfentrazone, atrazine, and glyphosate. Diquat and its mixtures showed greater efficacy in anticipating the harvest. Flumioxazin and diquat alone reduced amino acid content by 61.72 and 51.44%, respectively. The same trend was observed for total soluble proteins. The activity of antioxidant enzymes (CAT, POD, PPO) increased, indicating oxidative stress caused by diquat and flumioxazin. In the second experiment, we tested three application times (6 a.m., 12 p.m., 6 p.m.) with diquat, diquat + flumioxazin, and diquat + carfentrazone. The lowest damage to chlorophyll a was at 6 a.m.; other times reduced photosynthetic pigments and increased carotenoid content. Total soluble sugars decreased by 27.74% with nocturnal application of diquat + flumioxazin. Our data indicate that herbicide use for desiccation affects seed quality. These findings highlight the need for selecting appropriate herbicides and application times. Future research should explore long-term impacts on crop yield and quality.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%