Experimental methods for phenotypic and molecular analyses of seed shattering in cultivated and weedy rice Guilherme M. Turra, Xiang Li, Anderson L. Nunes, Catarine Markus, Ana L. Caicedo, Aldo Merotto Advances in Weed Science, 2024 The seed shattering trait has been repeatedly reshaped during rice evolution. Reduced in cultivated rice and increased in weedy rice, shattering is of great agronomic importance because of its association with yield losses. Since its first descriptions, the phenotypic patterns and the genetic regulation of cultivated and weedy rice seed shattering have been extensively studied, with a variety of methods and techniques. The aim of this review is to discuss and recommend the most suitable experimental methods for phenotypic [...]
The straw presence preceding soybean crop increases the persistence of residual herbicides Felipe Patel, Michelangelo Muzell Trezzi, Anderson Luis Nunes, Henrique Von Hertwig Bittencourt, Francielli Diesel, Fortunato De Bortoli Pagnoncelli Advances in Weed Science, 2023 Background There is little information on how different soil cover systems influence the residual effect of pre-emergent herbicides used in soybean cultivation in Brazil. Objective The objective was to compare the persistence of different pre-emergent herbicides in a Latosolic Dystrophic Red Nitosol soil in the presence or absence of black oat straw on the soil surface. Methods The herbicides used were chlorimuron-ethyl (40.0 g ai ha-1), diclosulam (70.1 g ai ha-1), flumioxazin (100.0 ai g ha-1) and saflufenacil (70.0 [...]
Integrated weed management strategies in a long-term crop rotation system Eduardo C. Rudell, Bianca A. Zanrosso, Dieferson Frandaloso, Argel J. Giacomini, Daelcio V. Spadotto, Leandro Vargas, Anderson L. Nunes, Fernando M. Santos Advances in Weed Science, 2023 Background Diversified crop systems provide several advantages for crop production and the agricultural ecosystem. In contrast, growing the same crop for consecutive years increases weeds, insects, and diseases issues, adding further cost to crop production owing to their management. Objective The objective was to evaluate the effects of six different winter cover crops and compare the impacts of a diversified rotation system in contrast to the succession system, combined with three different post-emergence herbicide management looking up to soybean [...]
Integrated weed management strategies in a long-term crop rotation system Eduardo C. Rudell, Bianca A. Zanrosso, Dieferson Frandaloso, Argel J. Giacomini, Daelcio V. Spadotto, Leandro Vargas, Anderson L. Nunes, Fernando M. Santos Advances in Weed Science, 2022 Background Diversified crop systems provide several advantages for crop production and the agricultural ecosystem. In contrast, growing the same crop for consecutive years increases weeds, insects, and diseases issues, adding further cost to crop production owing to their management. Objective The objective was to evaluate the effects of six different winter cover crops and compare the impacts of a diversified rotation system in contrast to the succession system, combined with three different post-emergence herbicide management looking up to soybean [...]
Management of superficial straw associate with strategy of physical improvement of the soil in the emergence of weeds D.P. Rosa, A.L. Nunes, A. Alves, M. Longaretti Revista Brasileirade Ciencias Agrarias, 2021 The objective of this work was to qualify the improvement of the physical properties of the soil and the reduction of weeds by combining the management of the superficial cover associated with a strategy of physical improvement soil in the drilling, seeking the maintenance of the no-tillage system. The experiment was carried out in the 2015/16 and 2017/18 harvests, using a randomized block design in a two-factorial scheme (3 2) with three managements of the ground cover (chopped, rolled and natural) and two depths of planter’s shank (7 and 12 cm). Counts and identification of weeds emerged in the row and between the lines of the soybean crop at 20 and 40 days after emergence, bulk density, mechanical resistance of the soil to penetration and total soil porosity in the flowering of the soybean culture were measured. The management of the straw cover combined with the depth of action of the planter shank influenced the emergence of weeds, as well as, the increase in the depth of the furrow improvement of the physical environment of the soil in the sowing line, reducing penetration resistance, bulk density and increasing total porosity.
Expression of genes related to the mechanism of resistance of conyza sumatrensis to glyphosate Theodoro Schneider, Mauro Antônio Rizzardi, Magali Ferrari Grando, Cássia Canzi Ceccon, Anderson Luis Nunes, Dielli Didone Acta Scientiarum Agronomy, 2021 The elucidation of the resistance mechanism of weeds to herbicides is important for management practices. The objective of this work was to investigate the resistance mechanism of glyphosate-resistant C. sumatrensis biotypes by determining the expression levels of the constitutive gene epsps and two ABC transport protein-coding genes designated m7 and m11 with RT-qPCR. Two biotypes of C. sumatrensis were evaluated: one resistant and one susceptible to glyphosate. The treatments consisted of the absence or application of two doses of glyphosate (1,080 and 8,640 g a.e. ha-1). Plant leaves were collected at 1 and 4 days after herbicide application. No difference was observed in epsps gene expression between the studied biotypes. The expression of the m7 and m11 genes revealed that both genes had higher relative expression in the resistant biotype with the application of glyphosate at both doses. The overexpression of the m7 and m11 genes in the resistant biotype treated with glyphosate reveals that these genes play a role in herbicide resistance. These genes may be involved in the sequestration of glyphosate into the vacuole lumen in the resistant C. sumatrensis biotype studied.
Interaction of acetyl-CoA carboxylase enzyme inhibiting herbicides with Auxin herbicides on ryegrass Rubens Antonio Polito, Larissa Pasqualotto, Rafael Dysarz, Rafaela Cinelli, Tamara Heck, Anderson Luis Nunes Ciencia Rural, 2021 This study aimed to evaluate the antagonistic effect of the mixture ofacetyl coenzyme-A carboxylase (ACCase) enzyme inhibiting herbicides and auxin herbicides in Lolium multiflorum and to determine mechanisms to mitigate this possible effect. The first experiments were conducted by associating the herbicide clethodim (108 g a.i. ha−1), quizalofop-p-ethyl (54 g a.i. ha−1), and clethodim + quizalofop-p-ethyl (108+54 g a.i. ha−1) with 2,4-D (1005 g a.e. ha−1) or triclopyr (720 g a.e. ha−1), in addition to the sole application of the respective graminicides. Another experiment included clethodim (54; 81; 108; 162; 216 g a.i. ha−1), quizalofop-p-ethyl (27; 40.5; 54; 81; 108 g a.i. ha−1), and clethodim + quizalofop-p-ethyl (54+27; 81+40.5; 108+54; 162+81; 216+108 g a.i. ha−1) mixed with 2,4-D (1005 g a.e. ha−1), or triclopyr (720 g a.e. ha−1), in addition to the control treatments without herbicide application. In the second experiment, herbicides clethodim (108 g a.i. ha−1), quizalofop-p-ethyl (54 g a.i. ha−1), and clethodim + quizalofop-p-ethyl (108+54 g a.i. ha−1) in combination with the herbicides 2,4-D (1005 g a.e. ha−1) or triclopyr (720 g a.e. ha−1)had malathion (1000 g a.i. ha−1) or glyphosate (720 g a.e. ha−1) mixed, in addition to the sole applications of the graminicides. The herbicide clethodim + quizalofop-p-ethyl did not present an antagonistic interaction with the auxin herbicides, and obtained 85% weed control. To obtain control similar to the sole application of this graminicide, the dose of the herbicide clethodim needs to be increased by 20%. However, the mixture of the herbicide quizalofop-p-ethyl with 2,4-D and triclopyr affects the ryegrass control. The use of strategies that increase the absorption of ACCase herbicides or the inhibition of P450 enzymes are ways to mitigate the antagonistic effect caused by the association of the two auxin herbicides.
Importance of sequential herbicide application in the control of elephantopus mollis Anderson Luis Nunes, Bruno Cazaroto, Mauro Antônio Rizzardi, Mário Antonio Bianchi, Leandro Oliveira da Costa, Aldo Merotto Junior Ciencia Rural, 2021 RESUMO: Popularmente conhecida como pata de elefante ou sussuaiá, Elephantopus mollis, é uma espécie que recentemente surgiu como uma planta daninha em lavouras de cultivos de grãos. Objetivou-se com este estudo avaliar a sensibilidade diferencial de biótipos de E. mollis oriundos de áreas agrícolas e não agrícolas e determinar as melhores combinações de herbicidas aplicados em diferentes estádios de desenvolvimento para o controle desta espécie. Foram realizados três experimentos. No experimento de sensibilidade diferencial foram utilizados dez herbicidas em dois biótipos em duas fases de desenvolvimento. O experimento de dose resposta foi conduzido com oito doses de sete herbicidas. O experimento a campo foi realizado em uma área que apresenta problemas com a planta daninha para validar os resultados dos experimentos anteriores. O biótipo oriundo de área agrícola apresentou menor sensibilidade aos herbicidas quando comparado ao biótipo oriundo de área não agrícola. Os herbicidas de contato inicialmente apresentam controle superior, mas logo a planta apresenta rebrote em função de gemas presentes no colo da planta. A aplicação isolada de 2,4-D com doses entre 1005 e 1675 g e.a ha-1 possui controle de 25%. Quando o 2,4-D é seguido da aplicação de paraquat (400 g i.a ha-1) o controle passa a ser entre 51 e 68%. O melhor tratamento para o controle de plantas desenvolvidas é a mistura de 2,4-D + glyphosate (1340 + 1080 g e.a ha-1) com aplicação sequencial de paraquat.
Glyphosate-resistant soybeans yield in function of glyphosate salts, doses and stadium phenological Lucas Alfonso Rohr, Rafaela Cinelli, Rubens Antonio Polito, Tamara Heck, Noryam Bervian Bispo, Anderson Luis Nunes Bioscience Journal, 2020 Given the importance of soybean to the global economy and as a food source, improving crop management techniques is integral to obtaining higher yields. As such, this study aimed to assess the yield of soybean cultivars as a function of different glyphosate salt formulations, doses and application times. Two field experiments were conducted simultaneously using a randomized block design and 3x4x2 factorial scheme, with three repetitions. Factor A consisted of three glyphosate formulations: isopropylamine salt (Roundup Original®), ammonium salt (Roundup WG®), and potassium salt (Zapp Qi®), factor B four application times: 0, 14, 28, 42 days after planting (DAP), and factor C two doses: the recommended dose of 720 grams of acid equivalent per hectare and twice that (1440 grams of acid equivalent per hectare). There was no difference between the glyphosate salts for the BMX Ativa RR® cultivar, but yields of BMX Apolo RR® submitted to ammonium salt were 28% higher than those recorded for the other salts studied. Glyphosate potassium salt resulted in lower soybean yields. Potassium salt application between 14 and 28 DAP caused greater toxicity in both the soybean cultivars analyzed.
Correlation between sowing and fertilizer application systems and weeds in soybean crops1 ELIAKIN FREDERICO RAFAIN, JOÃO EDSON GUBIAN, DAVID PERES DA ROSA, ANDERSON LUIS NUNES Revista Caatinga, 2020 The objective of this study was to evaluate the effects sowing systems and fertilizer application systems on the incidence of weeds and on yield components in soybean crops. Two experiments were conducted in soils with different fertility levels. An experimental design in split-plot was used; the plots consisted of four sowing systems: crossed sowing (0.45×0.45 m), and spacings between rows of 0.35 m, 0.175 m, and 0.45 m; and the subplots consisted of fertilizer application systems: application in the sowing row, broadcast fertilizer application at sowing, and no fertilizer application. The variables evaluated were: grain yield, 1000-grain weight, and weed incidence at 30 and 50 days after sowing (DAS). The weed incidence at 30 DAS was lower when using spacing between rows of 0.45 m, which was correlated with the lower turning of the soil surface layer. The plant spacing between rows of 0.175 m resulted in a lower competition with weeds at 50 DAS and in a higher shading, generating higher grain yields. The fertilizer application in the sowing row resulted in a higher grain yield and 1000-grain weight. The sowing system affects the weed population dynamics, which directly affects the grain yield of soybean crops.
Difusão de técnicas e extensão no manejo de plantas daninhas-Ano 2024 R Silveira, AL Nunes 9º SALÃO DE PESQUISA, EXTENSÃO E ENSINO DO IFRS , 2025 2025
Alternative herbicides to control Italian ryegrass due to the ban of paraquat in Brazil R Cinelli, RA Polito, R Dysarz, J L. Ribas, AM Hahn, AL Nunes International Journal of Pest Management 71 (1), 62-73 , 2025 2025 Citations: 2
Viabilidade econômica de métodos de colheita e uso de selantes em canola AL Nunes, JS Zago, R Breitenbach, MM Trezzi, L Galon, PB Pereira Ciencia rural 55 (9), 5 , 2025 2025
Eficácia de herbicidas pré-emergentes no manejo de losna e leiteiro em soja GD Supptitz, AL Nunes, A Lazzari, AM Hahn, W Santini 9º SALÃO DE PESQUISA, EXTENSÃO E ENSINO DO IFRS , 2024 2024
Abordagens proativas para o manejo de biótipos de azevém resistentes a herbicidas inibidores da enzima ACCase GR Balico, AL Nunes, MC Rodrigues, AM Hahn, W Santini, RS Visoto 9º SALÃO DE PESQUISA, EXTENSÃO E ENSINO DO IFRS , 2024 2024
Plantas daninhas: identificação de resistência e propostas de manejo RS Visoto, AL Nunes 9º SALÃO DE PESQUISA, EXTENSÃO E ENSINO DO IFRS , 2024 2024
Como se da a interação entre herbicidas inibidores da protoporfirinogênio oxidase e da glutamina sintetase em aplicações dirigidas sob Ambrosia artemisiifolia e Euphorbia … W Santini, AL Nunes, A Hahn, P Basso, G Balico, G Supptitz, A Lazarri, ... IX SerTão Aplicado , 2024 2024
Caracterização e identificação de resistência em plantas daninhas RS Visoto, AL Nunes, CA Piana, GR Balico IX SerTão Aplicado , 2024 2024
Iniciativas em resposta à presença de biótipos de azevém resistentes a herbicidas que inibem a enzima ACCase na região Sul do Brasil GR Balico, AL Nunes, RS Visoto, MC Rodrigues, AM Hahn, W Santini IX SerTão Aplicado , 2024 2024
Experimental methods for phenotypic and molecular analyses of seed shattering in cultivated and weedy rice GM Turra, X Li, AL Nunes, C Markus, AL Caicedo, A Merotto Junior Advances in Weed Science 41, e020230049 , 2024 2024 Citations: 4
Desenvolvimento de associações de herbicidas inibidores da ACCase com 2, 4-D. LM Duarte, AL Nunes, GD Supptitz, PHS Basso, W Santini 8º SALÃO DE PESQUISA, EXTENSÃO E ENSINO DO IFRS , 2023 2023
Herbicidas pré-emergentes são fundamentais no manejo de plantas daninhas na cultura da soja GD Supptitz, AL Nunes, AM Hahn, PH Basso, W Santini, J Grando, ... 8º SALÃO DE PESQUISA, EXTENSÃO E ENSINO DO IFRS , 2023 2023
Performance de duas marcas comerciais de clethodim com associação de diferentes auxínicos no controle de capim-amargoso W Santini, AL Nunes, A Lazzari, AM Hahn, PH Basso, RM da Silveira, ... 8º SALÃO DE PESQUISA, EXTENSÃO E ENSINO DO IFRS , 2023 2023
The straw presence preceding soybean crop increases the persistence of residual herbicides F Patel, MM Trezzi, AL Nunes, HVH Bittencourt, F Diesel, ... Advances in Weed Science 41, e020200051 , 2023 2023 Citations: 8
Integrated weed management strategies in a long-term crop rotation system EC Rudell, BA Zanrosso, D Frandaloso, AJ Giacomini, DV Spadotto, ... Advances in Weed Science 41, e020220053 , 2023 2023 Citations: 14
Desenvolvimento de associações de herbicidas inibidores da ACCase com 2, 4-D M Manica, GD Supptitz, AL Nunes, W Santini, PHS Basso, AM Hahn, ... VII SerTão Aplicado: Mostra de Ensino, Pesquisa e Extensão , 2022 2022
Ocorrência de biótipos de azevém resistentes a herbicidas no sul do Brasil EN Holdefer, AM Hahn, M Manica, W Santini, PC Rossatto, A Lazzari, ... VII SerTão Aplicado: Mostra de Ensino, Pesquisa e Extensão , 2022 2022
ATIVIDADES PRÁTICAS NA FORMAÇÃO DIFERENCIADA DE FUTUROS ENGENHEIROS AGRÔNOMOS-Ano 2022 PC Rossatto, LM Duarte, RM Da Silveira, AL Nunes VII SerTão Aplicado: Mostra de Ensino, Pesquisa e Extensão , 2022 2022
Atividades práticas na formação diferenciada de futuros Engenheiros Agrônomos em 2021 EN Holdefer, PC Rossatto, AM Hahn, M Manica, W Santini, A Lazzari, ... VII SerTão Aplicado: Mostra de Ensino, Pesquisa e Extensão , 2022 2022
Desenvolvimento de associações de herbicidas inibidores da ACCase com 2, 4-D AP Hahn, AL Nunes 7º SALÃO DE PESQUISA, EXTENSÃO E ENSINO DO IFRS , 2022 2022
MOST CITED SCHOLAR PUBLICATIONS
Evolutionary and social consequences of introgression of nontransgenic herbicide resistance from rice to weedy rice in Brazil A Merotto Jr, ICGR Goulart, AL Nunes, A Kalsing, C Markus, VG Menezes, ... Evolutionary Applications 9 (7), 837-846 , 2016 2016 Citations: 103
Multiple Resistance of Acetolactate Synthase and Protoporphyrinogen Oxidase Inhibitors in Euphorbia heterophylla Biotypes MM Trezzi 1*, CL Felippi 1, D Mattei 1, HL Silva 1, AL Nunes 1, ... Journal of Environmental Science and Health, Part B 40 (1), 101-109 , 2005 2005 Citations: 67
Microwave‐Assisted Extraction of Phenolic Acids and Flavonoids from Physalis angulata N Carniel, RM Dallago, C Dariva, JP Bender, AL Nunes, O Zanella, ... Journal of Food Process Engineering 40 (3), e12433 , 2017 2017 Citations: 42
Identification of origin and analysis of population structure of field-selected imidazolinone-herbicide resistant red rice ( Oryza sativa ) ICG dos Reis Goulart, MT Pacheco, AL Nunes, A Merotto Jr Euphytica 187 (3), 437-447 , 2012 2012 Citations: 41
Efeito da compactação do solo sobre a semente no desenvolvimento da cultura do feijão AJ Modolo, E Trogello, AL Nunes, JCM Silveira, EM Kolling Acta Scientiarum. Agronomy 33, 89-95 , 2011 2011 Citations: 39
Pressurized liquid extraction of polyphenols from Goldenberry: Influence on antioxidant activity and chemical composition GO Corazza, D Bilibio, O Zanella, AL Nunes, JP Bender, N Carniel, ... Food and Bioproducts Processing 112, 63-68 , 2018 2018 Citations: 38
Interferência entre plantas daninhas e a cultura: alterações no metabolismo secundário AP Rockenbach, MA Rizzardi, AL Nunes, MA Bianchi, A Caverzan, ... Weed Control Journal 17 (1), 59-70 , 2018 2018 Citations: 35
Gene expression related to seed shattering and the cell wall in cultivated and weedy rice AL Nunes, CA Delatorre, A Merotto Jr Plant Biology 16 (5), 888-896 , 2014 2014 Citations: 33
Seleção de plantas quantificadoras de herbicidas residuais AL Nunes, RA Vidal Revista de Ecotoxicologia e meio ambiente 19 (1), 19-28 , 2009 2009 Citations: 32
A multy-year study reveals the importance of residual herbicides on weed control in glyphosate-resistant soybean AL Nunes, J Lorenset, JE Gubiani, FM Santos Planta Daninha 36, e018176135 , 2018 2018 Citations: 26
Utilização da planta medicinal erva-de-são-joão (Hypericum perforatum L.) no tratamento de depressão A Nunes Universidade Federal do Parana , 2018 2018 Citations: 21
Eficácia de controle de plantas daninhas e toxicidade ao milho da mistura de foramsulfuron e iodosulfuron isoladamente ou em associação com atrazine e/ou clorpirifós MM Trezzi, CL Felippi, AL Nunes, CE Carnieleto, ARJ Ferreira Planta Daninha 23 (4), 653-659 , 2005 2005 Citations: 21
Bioensaios para identificação de biótipos de Euphorbia heterophylla com resistência múltipla a inibidores da ALS e da PROTOX MM Trezzi, RA Vidal, ND Kruse, AL Nunes Planta daninha 24, 563-571 , 2006 2006 Citations: 20
Efeito de cargas aplicadas e profundidades de semeadura no desenvolvimento da cultura do feijão em sistema plantio direto AJ Modolo, E Trogello, AL Nunes, HC Fernandes, JCM Silveira, ... Ciência e Agrotecnologia 34 (3), 739-745 , 2010 2010 Citations: 18
Pod sealant and canola harvest methods for pod shattering mitigation AL Nunes, J Ascari, L Pereira, SG Sossmeier, NB Bispo Australian Journal of Crop Science 9 (9) , 2015 2015 Citations: 16
Persistência do herbicida S-metolachlor associado ao glyphosate ou paraquat em plantio direto AL Nunes, RA Vidal Planta Daninha 26 (2), 385-393 , 2008 2008 Citations: 16
Nucleotide variability and gene expression reveal new putative genes related to seed shattering in weedy rice AL Nunes, C Markus, CA Delatorre, A Merotto Jr Annals of Applied Biology 166 (1), 39-52 , 2015 2015 Citations: 15
Integrated weed management strategies in a long-term crop rotation system EC Rudell, BA Zanrosso, D Frandaloso, AJ Giacomini, DV Spadotto, ... Advances in Weed Science 41, e020220053 , 2023 2023 Citations: 14
Manejo químico de plantas daninhas na cultura do milho em função de características morfofisiológicas e redução de espaçamento da cultura MM Trezzi, RA Vidal, ND Kruse, MVB Prates, MS Gustman, AL Nunes, ... Planta Daninha 26 (4), 845-853 , 2008 2008 Citations: 14
Interações entre herbicidas e protetores para o controle de capim-annoni em pastagem natural ICGR Goulart, AL Nunes, V Kupas, A Merotto Junior Ciência Rural 42 (10), 1722-1730 , 2012 2012 Citations: 13
