Advances in Weed Science最新文献_第4页

Modelling atrazine sorption in carbon-rich substrates: a case study 模拟富碳基质对阿特拉津的吸附:一个案例研究

IF 2.1 4区农林科学

Advances in Weed Science Pub Date : 2022-01-01 DOI: 10.51694/advweedsci/2022;40:00025

D. Dick, Larissa Z. Lara, J. B. Costa, Cristiano Fontanivab, Ana Cristina Lüdtke, H. Knicker

{"title":"Modelling atrazine sorption in carbon-rich substrates: a case study","authors":"D. Dick, Larissa Z. Lara, J. B. Costa, Cristiano Fontanivab, Ana Cristina Lüdtke, H. Knicker","doi":"10.51694/advweedsci/2022;40:00025","DOIUrl":"https://doi.org/10.51694/advweedsci/2022;40:00025","url":null,"abstract":": Background: The use of carbonaceous materials for environmental remediation is attractive due to low expense and high sorption capacity. However, their efficiency in contaminant removal is affected by substrate composition and sorption mechanism. Objective: This study investigated atrazine sorption and desorption in three carbon-rich substrates. Data were evaluated considering isotherm models and sorbent chemical composition. Methods: Sorption was performed by the batch equilibrium method with three substrates obtained from pig slurry composting with different proportions (w/w) of charcoal fines (CF): CF0, CF9 (9% CF), and CF18 (18% CF). The substrates were characterized by elemental analysis, 13 C NMR CP/MAS spectroscopy. The Freundlich and Dubinin-Radushkevich (DRK) models better fitted the sorption data (0.96>R 2 >0.81), followed by Temkin (0.95>R 2 >0.76). Charcoal addition to composting substrates increased carbon content and the aromaticity in the order CF0<CF9< CF18. However, the sorption affinity decreased in the opposite order as indicated by the Kf values: 675, 335 and 290 L kg -1 , respectively. Values of the E parameter (DRK) varied from 8.05 to 8.29 kJ mol -1 , suggesting a predominant physical sorption mechanism, whereas the Bt coefficient (Temkin) indicated an endothermic process. Desorption was only observed at higher atrazine concentrations (>10 mg L -1 ), and the desorption Kf values were greater than the respective sorption values. Conclusions: Atrazine sorption in the tested C-rich substrates is not governed by the carbon content or aromaticity. The low sorption reversibility implies a low atrazine mobility from the tested substrates and suggests their potential for herbicide removal in the environment.","PeriodicalId":29845,"journal":{"name":"Advances in Weed Science","volume":"1 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70675020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Geographical distribution and resistance level to chlorimuron of Amaranthus spp. populations in the main soybeans producing regions of Brazil 巴西大豆主产区苋菜种群的地理分布及对氯脲的抗性水平

IF 2.1 4区农林科学

Advances in Weed Science Pub Date : 2022-01-01 DOI: 10.51694/advweedsci/2022;40:amaranthus010

A. G. Netto, L.S. Resende, M. R. Malardo, J. C. Presoto, J. D. F. Andrade, M. Nicolai, R. F. L. Ovejero, S. Carvalho

{"title":"Geographical distribution and resistance level to chlorimuron of\u0000 Amaranthus\u0000 spp. populations in the main soybeans producing regions of Brazil","authors":"A. G. Netto, L.S. Resende, M. R. Malardo, J. C. Presoto, J. D. F. Andrade, M. Nicolai, R. F. L. Ovejero, S. Carvalho","doi":"10.51694/advweedsci/2022;40:amaranthus010","DOIUrl":"https://doi.org/10.51694/advweedsci/2022;40:amaranthus010","url":null,"abstract":": Background: Species of Amaranthus genus are common in agricultural areas of Brazil. Such weeds are problematic, and they bring complexity to the management mainly due to herbicide resistance. Thus, the monitoring and mapping of chlorimuron-resistant Amaranthus spp. is necessary to detect resistance in different locations of Brazil. Objective : Elaborate discriminating dose of distinction between Amaranthus spp. populations that are susceptible and resistant to chlorimuron and monitor the resistance dispersal throughout five crops. Methods : 33 pigweed populations from the main grain producing properties in Brazil by means of dose-response curves were evaluated. For the D dose, chlorimuron dose of 20 g ha -1 ai was considered. Once the discriminating dose was identified, a monitoring screening of the dispersal of resistance of Amaranthus spp. to chlorimuron was conducted with 226 samples between the 2016 and 2020 crops. Results : The discriminating dose (“base line”) considered ideal to control susceptible plants was 20 g ha -1 of chlorimuron. Among 226 pigweed samples evaluated in the five years of monitoring, 74% of populations were considered susceptible (S), while those classified as resistant (R) and segregating (r) did not exceed 26.0%. Conclusions : By comparing susceptible biotypes of Amaranthus spp. with international scientific literature standards and leaflet averages, it could be safely concluded that the discriminating dose of chlorimuron is 20 g ha -1 . Resistance of Amaranthus spp. to chlorimuron in Brazil is present in the main soybean producing regions evaluated, with a frequency of 26% of the total samples evaluated.","PeriodicalId":29845,"journal":{"name":"Advances in Weed Science","volume":"38 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70675101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phytosociology of weeds on Cerrado Mineiro coffee growing farms Cerrado Mineiro咖啡种植农场杂草的植物社会学

IF 2.1 4区农林科学

Advances in Weed Science Pub Date : 2022-01-01 DOI: 10.51694/advweedsci/2022;40:00013

Rafael J. A. Rodrigues, G. R. Carvalho, A. H. Gonçalves, J. Carvalho, E. N. Alcântara, L.S. Resende

引用次数: 0

Glyphosate efficacy, absorption and translocation for Eragrostis plana control 草甘膦防治稻蠹蛾的功效、吸收和转运

IF 2.1 4区农林科学

Advances in Weed Science Pub Date : 2022-01-01 DOI: 10.51694/advweedsci/2022;40:00017

F. C. Caratti, M. L. Zaccaro-Gruener, M. Noguera, Luis A. Avila, N. Roma‐Burgos, F. Lamego

引用次数: 0

Imidazolinone herbicide dissipation in rice fields as affected by intermittent and continuous irrigation 间歇和连续灌溉对稻田咪唑啉酮除草剂耗散的影响

IF 2.1 4区农林科学

Advances in Weed Science Pub Date : 2022-01-01 DOI: 10.51694/advweedsci/2022;40:00006

Gustavo V. Junkes, Luis A. Avila, M. Kemmerich, V. R. Gehrke, M. V. Fipke, E. R. Camargo

引用次数: 0

An Insight of Quinclorac Resistance Mechanism in Early Watergrass ( Echinochloa oryzoides ) 早期水草(Echinochloa oryzoides)对喹诺啉的抗性机制研究

IF 2.1 4区农林科学

Advances in Weed Science Pub Date : 2022-01-01 DOI: 10.51694/advweedsci/2022;40:00009

M. Z. Haq, Zheng Zhang, S. Qiang, Ramala Masood Ahmad, Dina Abdulmajid, M. Fiaz

引用次数: 0

Weed management in Roundup Ready® corn and soybean in Southern Brazil: survey of consultants’ perception 巴西南部抗草甘膦玉米和大豆的杂草管理:咨询顾问的看法调查

IF 2.1 4区农林科学

Advances in Weed Science Pub Date : 2022-01-01 DOI: 10.51694/advweedsci/2022;40:00003

Aline S. Holkem, A. L. Silva, M. A. Bianchi, G. Corassa, A. Ulguim

引用次数: 1

First report of multiple resistance of goosegrass to herbicides in Brazil 巴西鹅草对除草剂多重抗性的首次报道

IF 2.1 4区农林科学

Advances in Weed Science Pub Date : 2022-01-01 DOI: 10.51694/advweedsci/2022;40:00012

N. M. Correia, L. D. S. Araújo, Roni A. Bueno

引用次数: 1

Agronomic implications of paraquat ban in Brazil 巴西百草枯禁令对农艺的影响

IF 2.1 4区农林科学

Advances in Weed Science Pub Date : 2022-01-01 DOI: 10.51694/advweedsci/2022;40:seventy-five009

A. Albrecht, L. Albrecht, A. F. M. Silva

引用次数: 1

RNAi as a tool for weed management: challenges and opportunities RNAi作为杂草管理的工具:挑战与机遇

IF 2.1 4区农林科学

Advances in Weed Science Pub Date : 2022-01-01 DOI: 10.51694/advweedsci/2022;40:seventy-five006

Diana Zabala-Pardo, T. Gaines, F. Lamego, Luis A. Avila

{"title":"RNAi as a tool for weed management: challenges and opportunities","authors":"Diana Zabala-Pardo, T. Gaines, F. Lamego, Luis A. Avila","doi":"10.51694/advweedsci/2022;40:seventy-five006","DOIUrl":"https://doi.org/10.51694/advweedsci/2022;40:seventy-five006","url":null,"abstract":"capable of inducing gene silencing (referred to as spray-induced gene silencing, SIGS) without involving the use of transgenes, reaching traditional targets in chemical control, targets that are not today more sensitive to herbicides and even new targets. Here we present the main challenges and opportunities for using SIGS as a practical tool for weed management. The development of SIGS in weed science has been slower compared to other crop protection areas such as entomology and plant pathology due to the difficulty of obtaining stable molecules that easily enter the plant, without off-target risks to crops, and that in small amounts guarantee systemic silencing with effectiveness. To overcome the challenges, it is necessary to achieve the synthesis of sRNAs on a large scale, making the field application practical and economical, develop formulations that protect sRNAs inside and outside the plant, and substantially increase the genomic and transcriptomic information available for weeds. Once these barriers have been overcome, SIGS technology could be similarly used in the field as herbicides are used today, spraying directly on the crop and selectively controlling weeds. This will provide a new tool for weed management, herbicide resistance management, and potentially exploration of new plant enzyme targets never before achieved by chemical control.","PeriodicalId":29845,"journal":{"name":"Advances in Weed Science","volume":"1 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70675430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5