Pub Date : 2022-01-01DOI: 10.51694/advweedsci/2022;40:00025
D. Dick, Larissa Z. Lara, J. B. Costa, Cristiano Fontanivab, Ana Cristina Lüdtke, H. Knicker
: 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 CF010 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.
{"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}
Pub Date : 2022-01-01DOI: 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
: 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.
背景:苋属植物常见于巴西的农业地区。这类杂草是一个问题，主要是由于它们对除草剂的抗性，给管理带来了复杂性。因此，对巴西不同地区的苋菜进行氯虫抗性的监测和作图是必要的。目的:建立对氯脲敏感和抗性苋菜种群的鉴别剂量，并监测5种作物对氯脲的抗性扩散情况。方法:采用剂量-反应曲线法对巴西主要粮食产区的33个藜草居群进行评价。对于D剂量，考虑氯脲剂量为20g / 1ai。在确定鉴别剂量后，选取2016 ~ 2020年作物间的226份样品，对苋菜抗性扩散情况进行监测筛选。结果:氯脲防治易感植物的理想鉴别剂量(“基线”)为20 g ha -1。在5年监测的226份猪草样本中，易感群体(S)占74%，抗性群体(R)和分离群体(R)占26.0%。结论:通过与国际科学文献标准和小叶平均水平比较苋属植物的敏感生物型，可以确定氯脲的鉴别剂量为20 g ha -1。巴西主要大豆产区存在苋属对氯脲的抗性，其抗性频率占总评估样本的26%。
{"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}
Pub Date : 2022-01-01DOI: 10.51694/advweedsci/2022;40:00013
Rafael J. A. Rodrigues, G. R. Carvalho, A. H. Gonçalves, J. Carvalho, E. N. Alcântara, L.S. Resende
{"title":"Phytosociology of weeds on Cerrado Mineiro coffee growing farms","authors":"Rafael J. A. Rodrigues, G. R. Carvalho, A. H. Gonçalves, J. Carvalho, E. N. Alcântara, L.S. Resende","doi":"10.51694/advweedsci/2022;40:00013","DOIUrl":"https://doi.org/10.51694/advweedsci/2022;40:00013","url":null,"abstract":"","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":"70673701","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}
Pub Date : 2022-01-01DOI: 10.51694/advweedsci/2022;40:00017
F. C. Caratti, M. L. Zaccaro-Gruener, M. Noguera, Luis A. Avila, N. Roma‐Burgos, F. Lamego
{"title":"Glyphosate efficacy, absorption and translocation for Eragrostis plana control","authors":"F. C. Caratti, M. L. Zaccaro-Gruener, M. Noguera, Luis A. Avila, N. Roma‐Burgos, F. Lamego","doi":"10.51694/advweedsci/2022;40:00017","DOIUrl":"https://doi.org/10.51694/advweedsci/2022;40:00017","url":null,"abstract":"","PeriodicalId":29845,"journal":{"name":"Advances in Weed Science","volume":"39 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70674057","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}
Pub Date : 2022-01-01DOI: 10.51694/advweedsci/2022;40:00006
Gustavo V. Junkes, Luis A. Avila, M. Kemmerich, V. R. Gehrke, M. V. Fipke, E. R. Camargo
{"title":"Imidazolinone herbicide dissipation in rice fields as affected by intermittent and continuous irrigation","authors":"Gustavo V. Junkes, Luis A. Avila, M. Kemmerich, V. R. Gehrke, M. V. Fipke, E. R. Camargo","doi":"10.51694/advweedsci/2022;40:00006","DOIUrl":"https://doi.org/10.51694/advweedsci/2022;40:00006","url":null,"abstract":"","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":"70673453","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}
Pub Date : 2022-01-01DOI: 10.51694/advweedsci/2022;40:00009
M. Z. Haq, Zheng Zhang, S. Qiang, Ramala Masood Ahmad, Dina Abdulmajid, M. Fiaz
{"title":"An Insight of Quinclorac Resistance Mechanism in Early Watergrass ( Echinochloa oryzoides )","authors":"M. Z. Haq, Zheng Zhang, S. Qiang, Ramala Masood Ahmad, Dina Abdulmajid, M. Fiaz","doi":"10.51694/advweedsci/2022;40:00009","DOIUrl":"https://doi.org/10.51694/advweedsci/2022;40:00009","url":null,"abstract":"","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":"70673962","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}
Pub Date : 2022-01-01DOI: 10.51694/advweedsci/2022;40:00003
Aline S. Holkem, A. L. Silva, M. A. Bianchi, G. Corassa, A. Ulguim
{"title":"Weed management in Roundup Ready® corn and soybean in Southern Brazil: survey of consultants’ perception","authors":"Aline S. Holkem, A. L. Silva, M. A. Bianchi, G. Corassa, A. Ulguim","doi":"10.51694/advweedsci/2022;40:00003","DOIUrl":"https://doi.org/10.51694/advweedsci/2022;40:00003","url":null,"abstract":"","PeriodicalId":29845,"journal":{"name":"Advances in Weed Science","volume":"67 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70673236","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}
Pub Date : 2022-01-01DOI: 10.51694/advweedsci/2022;40:00012
N. M. Correia, L. D. S. Araújo, Roni A. Bueno
{"title":"First report of multiple resistance of goosegrass to herbicides in Brazil","authors":"N. M. Correia, L. D. S. Araújo, Roni A. Bueno","doi":"10.51694/advweedsci/2022;40:00012","DOIUrl":"https://doi.org/10.51694/advweedsci/2022;40:00012","url":null,"abstract":"","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":"70674086","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}
Pub Date : 2022-01-01DOI: 10.51694/advweedsci/2022;40:seventy-five009
A. Albrecht, L. Albrecht, A. F. M. Silva
{"title":"Agronomic implications of paraquat ban in Brazil","authors":"A. Albrecht, L. Albrecht, A. F. M. Silva","doi":"10.51694/advweedsci/2022;40:seventy-five009","DOIUrl":"https://doi.org/10.51694/advweedsci/2022;40:seventy-five009","url":null,"abstract":"","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":"70675629","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}
Pub Date : 2022-01-01DOI: 10.51694/advweedsci/2022;40:seventy-five006
Diana Zabala-Pardo, T. Gaines, F. Lamego, Luis A. Avila
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.
{"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}
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