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João Wordell

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Noel B. Salazar

KU Leuven

Frédérique Langue G.

Centre National de la Recherche Scientifique / French National Centre for Scientific Research

Giampaolo Salice

Università degli Studi di Cagliari

Vitor Pordeus MD

Popular University for Art and Science

Eric Morier-Genoud

Queen's University Belfast

UERJ - Universidade do Estado do Rio de Janeiro / Rio de Janeiro State University

Universidad San Sebastián

Roberto García Ferreira

Universidad de la República

Université de Genève

María Luz Rodrigo-Estevan

University of Zaragoza

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Papers by João Wordell

Interferência de desenhos experimentais nos resultados de estudos de indução de resistência conduzidos com trigo

Thema/Revista Thema, May 21, 2024

The use of plants' natural defenses, including the utilization of different compounds and stimuli... more The use of plants' natural defenses, including the utilization of different compounds and stimuli, has increased significantly since the discovery of the metabolic pathways involved in the synthesis of specialized compounds by plants. When elicited, plants release a large amount of volatile organic compounds (VOCs) in the air, which can act as great communicators and elicitors to neighboring plants and organisms. These VOCs can cause significant interference when testing new compounds against biotic and abiotic agricultural stressors. To mitigate these interferences and ensure that the observed effects and results are solely attributed to the treatments being evaluated, it is crucial to perform plant elicitation trials in total controlled conditions with the use of physical barriers to prevent VOCs exchange between treatments. To investigate the potential interference caused by VOCs, a study was conducted comparing two experimental sets: one performed in an open field using a randomized complete block design (RCBD), and another conducted in total controlled conditions using a completely randomized design (CRD) with adaptations. The study found that, on average, an interference of over 22% was observed for the assessed parameters. This suggests that the exchange of VOCs between Palavras-chave: bioestimulante; indução de resistência; comunicação planta-planta; Interferência por VOCs; Solieria chordalis.

Resistance of Brazilian commercially grown maize genotypes to Macrospora Leaf Spot

Acta Scientiarum. Agronomy, Dec 11, 2023

Macrospora leaf spot (MLS), caused by the fungus Stenocarpella macrospora, is one of the most imp... more Macrospora leaf spot (MLS), caused by the fungus Stenocarpella macrospora, is one of the most important diseases affecting maize in Brazil. However, there are no MLS-resistant cultivars commercially available. Therefore, this study aimed to investigate the lesion expansion rate of MLS in four maize genotypes, leaf wetness duration (0-, 6-, 12-, 18-, 24-, 30-, 36-, 42-, and 54-hour post-inoculation), disease development severity in three maize genotypes, and resistance/tolerance levels to MLS in 141 maize genotypes commercially grown in Brazil. The estimates were performed using logistic models adjusted to the parameters analyzed, except for resistance/tolerance levels, which were analyzed using proposed severity and resistance scales. The experiment was carried out at the Laboratory of Plant Phytopathology of the Epagri/Cepaf, Santa Catarina State, Brazil, from 2016 to 2020. Disease resistance was significantly different among genotypes and fungal isolates. However, none of the genotypes showed resistance or high tolerance levels to MLS. Leaf wetness duration influenced maximum disease severity, and lesion expansion rate differed significantly among the genotypes tested. All information generated in this study is essential for breeding programs of maize for MLS resistance.

Efeito do arranjo de plantas na incidência de podridões da base do colmo e na incidência de grãos ardidos em milho

Promoção de crescimento vegetal por rizóbios

Revista Agropecuária Catarinense, Nov 21, 2012

Micotoxinas na cultura do milho

Agropecuária catarinense, 2010

Sensibilidade de Stenocarpella macrospora a fungicidas

DOAJ (DOAJ: Directory of Open Access Journals), Jun 1, 2013

Effect of rhizobacteria on onion seeds and seedlings

Agropecuária catarinense, 2009

Controle integrado da antracnose da cebola

Agropecuária catarinense, 2006

Emprego da calda bordalesa no controle de doenças

Rizobactérias promotoras de crescimento de plantas

Mancha branca no milho: etiologia e controle

Agropecuária catarinense, 2018

Resumo-A mancha branca, que tem a bactéria Pantoea ananatis como principal agente etiológico, alé... more Resumo-A mancha branca, que tem a bactéria Pantoea ananatis como principal agente etiológico, além de espécies fúngicas associadas, como Phaeosphaeria maydis, é uma doença que vem causando reduções na produtividade do milho, podendo chegar até 60% quando são utilizados híbridos suscetíveis sujeitos a condições favoráveis para a doença. Este trabalho tem como objetivo apresentar informações sobre a mancha branca e suas principais técnicas de manejo. Entre tais técnicas, destacam-se os controles genético, cultural e químico, sendo este último o mais utilizado, com ênfase na aplicação do grupo das estrobilurinas, por apresentar os melhores resultados. Termos para indexação: Zea mays L.; Pantoea ananatis; controle químico.

Tombamento causado por Fusarium verticillioides na cultura do milho

Agropecuária catarinense, 2018

Introdução O milho (Zea mays L.) tem importância socioeconômica no Sul do Brasil, principalmente ... more Introdução O milho (Zea mays L.) tem importância socioeconômica no Sul do Brasil, principalmente nas regiões do Planalto e Oeste Gaúcho e Catarinense e nos Campos Gerais do estado do Paraná. Na safra de 2015/16, a produção de milho da Região Sul do Brasil foi de aproximadamente 24,9 milhões de toneladas de grãos, representando 18,97% da produção nacional desse cereal (CEPA, 2017). Entre os fatores que podem reduzir o rendimento da cultura do milho estão as podridões de plântulas e podridões de colmo, causadas pelo fungo Fusarium verticillioides (Sacc.), que também é conhecido por Fusarium moniliforme J. Sheld., cuja forma perfeita (forma sexuada) é a Gibberella moniliformis Wineland ou Gibberella fujikuroi (Saw.) Wr. Esse fungo é responsável por apro-Tombamento causado por Fusarium verticillioides na cultura do milho João Américo Wordell Filho¹ e Cristiano Nunes Nesi² Resumo-O milho (Zea mays L.) é um cereal importante para o estado de Santa Catarina. Dentre as doenças de importância para a cultura do milho destaca-se a fusariose, causada pelo fungo Fusarium verticillioides. O fungo provoca necrose na radícula, coleóptilo e mesocótilo, que assume coloração rosa-salmão. Por fim, o fungo causa tombamento e morte de plântulas. Como medidas de controle estão a rotação de culturas, a adubação com base na análise do solo, o uso de sementes sadias, o tratamento de sementes e a utilização de densidade de semeadura recomendada, evitando semeaduras em solos úmidos, frios e mal drenados. É imprescindível aplicar e integrar essas práticas para o manejo bem-sucedido da doença. Termos de indexação: Zea mays L.; tombamento de plântulas; transmissão de doenças fúngicas por semente. Damping-off caused by Fusarium verticillioides in maize Abstract-Maize (Zea mays L.) is an important cereal for the state of Santa Catarina. Among the main diseases that affect the crop, fusarium rot stands out it is caused by Fusarium verticillioides fungus. The fungus causes necrosis in radicle, coleoptile and mesocotyl, which assumes pink-salmon coloration. Finally, the fungus causes damping-off and seedling death. The following control measures can be used: crop rotation, fertilization based on soil analysis, use of healthy seeds, avoidance of sowing in wet, cold and poorly drained soil, seed treatment and use of appropriate plant population density. It is indispensable to apply and integrate these practices for a successful management of the disease. Index terms: Zea mays L.; damping off; seed transmission of fungal diseases.

Reação de cultivares de cevada a Drechslera teres, e variabilidade patogênica de isolados do Sul do Brasil

Pesquisa Agropecuaria Brasileira, Jun 1, 2002

Reação de cultivares de cevada 775 Reação de cultivares de cevada a Drechslera teres, e variabili... more Reação de cultivares de cevada 775 Reação de cultivares de cevada a Drechslera teres, e variabilidade patogênica de isolados do Sul do Brasil (1) João Américo Wordell Filho (2) , Ariano Morais Prestes (3) e Márcio Só e Silva (4) Resumo-Objetivou-se avaliar a reação de 58 cultivares de cevada a Drechslera teres, agente causal da mancha-em-rede, bem como a variabilidade patogênica e freqüência de sintomas do patógeno. A reação das cultivares foi estimada com auxílio de uma escala de notas de 0 a 4, em que zero (0) representa a ausência de sintomas, e 4 representa os sintomas típicos da mancha-em-rede. O mesmo método foi utilizado para avaliar a variabilidade patogênica de 25 isolados oriundos do Sul do Brasil. Seis isolados de boa capacidade de esporulação foram utilizados para comparar o número de lesões e a severidade da doença. As cultivares diferiram quanto à reação a D. teres, e identificaram-se as três cultivares, BR 2, EMBRAPA 43 e PFC 8590, como fontes de resistência moderada à doença. Em testes de 25 isolados de D. teres, inoculados na concentração de 1,7x10 4 conídios/mL, detectaram-se diferenças significativas entre os isolados, evidenciando diferenças na sua virulência. Pelo sistema de nomenclatura de Limpert & Müller, foi possível diferenciar padrões de virulência de isolados oriundos de diferentes regiões do Sul do Brasil. O número de lesões e a severidade foram intimamente relacionadas com o local de origem do isolado. Termos para indexação: Hordeum vulgare, resistência a doenças, variação genética, virulência. Reaction of barley cultivars to Drechslera teres and pathogenic variability of isolates from the South of Brazil Abstract-This research aimed to evaluate 58 barley cultivars for resistance to net blotch caused by Drechslera teres and to determine the variability of isolates of the pathogen and frequency of symptoms of the disease. The cultivar reaction was estimated with aid of a 0 to 4 scale, in which zero represented the absence of symptom and 4 the typical symptoms of disease susceptibility. The same method was used to determine de pathogenic variability of isolates originated from the Southern Brazil. Six isolates of good sporulation capacity were used for comparison of number of lesions and disease severity. The cultivars showed differences in reaction to net blotch, and the cultivars BR 2, EMBRAPA 43 and PFC 8590 were identified as sources of moderate resistance to the disease. Test of 25 isolates of D. teres inoculated in concentration of 1.7x10 4 conidia/mL, evidenced significant differences among isolates regarding their virulence. Differentiated virulence patterns of isolates originated from different locations of the South of Brazil were identified by using the Limpert & Müller nomenclature system. The lesion number and severity of the disease were closely related to isolate local of origin.

Effects of fertilization on thrips and downy mildew incidence and on the yield of onion

Agropecuária catarinense, 2009

Ferrugem asiática da soja

Agropecuária catarinense, Dec 30, 2020

Hyperspectral imaging to characterize plant–plant communication in response to insect herbivory

Plant Methods, Jul 6, 2018

Background: In studies of plant stress signaling, a major challenge is the lack of non-invasive m... more Background: In studies of plant stress signaling, a major challenge is the lack of non-invasive methods to detect physiological plant responses and to characterize plant-plant communication over time and space. Results: We acquired time series of phytocompound and hyperspectral imaging data from maize plants from the following treatments: (1) individual non-infested plants, (2) individual plants experimentally subjected to herbivory by green belly stink bug (no visible symptoms of insect herbivory), (3) one plant subjected to insect herbivory and one control plant in a separate pot but inside the same cage, and (4) one plant subjected to insect herbivory and one control plant together in the same pot. Individual phytocompounds (except indole-3acetic acid) or spectral bands were not reliable indicators of neither insect herbivory nor plant-plant communication. However, using a linear discrimination classification method based on combinations of either phytocompounds or spectral bands, we found clear evidence of maize plant responses. Conclusions: We have provided initial evidence of how hyperspectral imaging may be considered a powerful noninvasive method to increase our current understanding of both direct plant responses to biotic stressors but also to the multiple ways plant communities are able to communicate. We are unaware of any published studies, in which comprehensive phytocompound data have been shown to correlate with leaf reflectance. In addition, we are unaware of published studies, in which plant-plant communication was studied based on leaf reflectance.

Primary and specialized metabolisms of Triticum aestivum L. affected by Solieria chordalis

Research Square (Research Square), Apr 13, 2023

Plant elicitation provides multi-bene ts to plant development and defense, besides helping to mak... more Plant elicitation provides multi-bene ts to plant development and defense, besides helping to make agriculture more sustainable. However, the use of wrong experimental designs and technics directly affects the results obtained. This favors the generation of biased and unreliable data. Therefore, an investigation was conducted to assess the eliciting potential of a red seaweed biostimulant (RSB) alone or in combination with fungicide in total controlled conditions on wheat (Triticum aestivum L.) plants. Catalase, superoxide dismutase, ascorbate peroxidase, phenylalanine ammonia-lyase (PAL), salicylic acid (SA) content, powdery mildew incidence, photosynthetic rates, and the water use e ciency were assessed in different periods after the application of the elicitor. The use of the RSB prevented the incidence of powdery mildew in wheat plants. The fungicide alone or in combination with the RSB resulted in negative photosynthetic rates and downregulated the activity of some enzymes. A greater PAL activity did not warrant a greater accumulation of SA in plants. Overall, the use of fungicide negatively affected wheat's primary and specialized metabolisms when compared to the application of the RSB alone.

Manejo da mancha branca na cultura do milho

DOAJ (DOAJ: Directory of Open Access Journals), Apr 1, 2020

Diagnose e manejo da ferrugem da folha, do oídio e do mosaico comum na cultura do trigo

Agropecuária catarinense, 2013

Manejo Ecolã“Gico De Doenã‡As Do Feijoeiro

Revista Brasileira de Agroecologia, Nov 12, 2006

Interferência de desenhos experimentais nos resultados de estudos de indução de resistência conduzidos com trigo

Thema/Revista Thema, May 21, 2024

The use of plants' natural defenses, including the utilization of different compounds and stimuli... more The use of plants' natural defenses, including the utilization of different compounds and stimuli, has increased significantly since the discovery of the metabolic pathways involved in the synthesis of specialized compounds by plants. When elicited, plants release a large amount of volatile organic compounds (VOCs) in the air, which can act as great communicators and elicitors to neighboring plants and organisms. These VOCs can cause significant interference when testing new compounds against biotic and abiotic agricultural stressors. To mitigate these interferences and ensure that the observed effects and results are solely attributed to the treatments being evaluated, it is crucial to perform plant elicitation trials in total controlled conditions with the use of physical barriers to prevent VOCs exchange between treatments. To investigate the potential interference caused by VOCs, a study was conducted comparing two experimental sets: one performed in an open field using a randomized complete block design (RCBD), and another conducted in total controlled conditions using a completely randomized design (CRD) with adaptations. The study found that, on average, an interference of over 22% was observed for the assessed parameters. This suggests that the exchange of VOCs between Palavras-chave: bioestimulante; indução de resistência; comunicação planta-planta; Interferência por VOCs; Solieria chordalis.

Resistance of Brazilian commercially grown maize genotypes to Macrospora Leaf Spot

Acta Scientiarum. Agronomy, Dec 11, 2023

Macrospora leaf spot (MLS), caused by the fungus Stenocarpella macrospora, is one of the most imp... more Macrospora leaf spot (MLS), caused by the fungus Stenocarpella macrospora, is one of the most important diseases affecting maize in Brazil. However, there are no MLS-resistant cultivars commercially available. Therefore, this study aimed to investigate the lesion expansion rate of MLS in four maize genotypes, leaf wetness duration (0-, 6-, 12-, 18-, 24-, 30-, 36-, 42-, and 54-hour post-inoculation), disease development severity in three maize genotypes, and resistance/tolerance levels to MLS in 141 maize genotypes commercially grown in Brazil. The estimates were performed using logistic models adjusted to the parameters analyzed, except for resistance/tolerance levels, which were analyzed using proposed severity and resistance scales. The experiment was carried out at the Laboratory of Plant Phytopathology of the Epagri/Cepaf, Santa Catarina State, Brazil, from 2016 to 2020. Disease resistance was significantly different among genotypes and fungal isolates. However, none of the genotypes showed resistance or high tolerance levels to MLS. Leaf wetness duration influenced maximum disease severity, and lesion expansion rate differed significantly among the genotypes tested. All information generated in this study is essential for breeding programs of maize for MLS resistance.

Efeito do arranjo de plantas na incidência de podridões da base do colmo e na incidência de grãos ardidos em milho

Promoção de crescimento vegetal por rizóbios

Revista Agropecuária Catarinense, Nov 21, 2012

Micotoxinas na cultura do milho

Agropecuária catarinense, 2010

Sensibilidade de Stenocarpella macrospora a fungicidas

DOAJ (DOAJ: Directory of Open Access Journals), Jun 1, 2013

Effect of rhizobacteria on onion seeds and seedlings

Agropecuária catarinense, 2009

Controle integrado da antracnose da cebola

Agropecuária catarinense, 2006

Emprego da calda bordalesa no controle de doenças

Rizobactérias promotoras de crescimento de plantas

Mancha branca no milho: etiologia e controle

Agropecuária catarinense, 2018

Resumo-A mancha branca, que tem a bactéria Pantoea ananatis como principal agente etiológico, alé... more Resumo-A mancha branca, que tem a bactéria Pantoea ananatis como principal agente etiológico, além de espécies fúngicas associadas, como Phaeosphaeria maydis, é uma doença que vem causando reduções na produtividade do milho, podendo chegar até 60% quando são utilizados híbridos suscetíveis sujeitos a condições favoráveis para a doença. Este trabalho tem como objetivo apresentar informações sobre a mancha branca e suas principais técnicas de manejo. Entre tais técnicas, destacam-se os controles genético, cultural e químico, sendo este último o mais utilizado, com ênfase na aplicação do grupo das estrobilurinas, por apresentar os melhores resultados. Termos para indexação: Zea mays L.; Pantoea ananatis; controle químico.

Tombamento causado por Fusarium verticillioides na cultura do milho

Agropecuária catarinense, 2018

Introdução O milho (Zea mays L.) tem importância socioeconômica no Sul do Brasil, principalmente ... more Introdução O milho (Zea mays L.) tem importância socioeconômica no Sul do Brasil, principalmente nas regiões do Planalto e Oeste Gaúcho e Catarinense e nos Campos Gerais do estado do Paraná. Na safra de 2015/16, a produção de milho da Região Sul do Brasil foi de aproximadamente 24,9 milhões de toneladas de grãos, representando 18,97% da produção nacional desse cereal (CEPA, 2017). Entre os fatores que podem reduzir o rendimento da cultura do milho estão as podridões de plântulas e podridões de colmo, causadas pelo fungo Fusarium verticillioides (Sacc.), que também é conhecido por Fusarium moniliforme J. Sheld., cuja forma perfeita (forma sexuada) é a Gibberella moniliformis Wineland ou Gibberella fujikuroi (Saw.) Wr. Esse fungo é responsável por apro-Tombamento causado por Fusarium verticillioides na cultura do milho João Américo Wordell Filho¹ e Cristiano Nunes Nesi² Resumo-O milho (Zea mays L.) é um cereal importante para o estado de Santa Catarina. Dentre as doenças de importância para a cultura do milho destaca-se a fusariose, causada pelo fungo Fusarium verticillioides. O fungo provoca necrose na radícula, coleóptilo e mesocótilo, que assume coloração rosa-salmão. Por fim, o fungo causa tombamento e morte de plântulas. Como medidas de controle estão a rotação de culturas, a adubação com base na análise do solo, o uso de sementes sadias, o tratamento de sementes e a utilização de densidade de semeadura recomendada, evitando semeaduras em solos úmidos, frios e mal drenados. É imprescindível aplicar e integrar essas práticas para o manejo bem-sucedido da doença. Termos de indexação: Zea mays L.; tombamento de plântulas; transmissão de doenças fúngicas por semente. Damping-off caused by Fusarium verticillioides in maize Abstract-Maize (Zea mays L.) is an important cereal for the state of Santa Catarina. Among the main diseases that affect the crop, fusarium rot stands out it is caused by Fusarium verticillioides fungus. The fungus causes necrosis in radicle, coleoptile and mesocotyl, which assumes pink-salmon coloration. Finally, the fungus causes damping-off and seedling death. The following control measures can be used: crop rotation, fertilization based on soil analysis, use of healthy seeds, avoidance of sowing in wet, cold and poorly drained soil, seed treatment and use of appropriate plant population density. It is indispensable to apply and integrate these practices for a successful management of the disease. Index terms: Zea mays L.; damping off; seed transmission of fungal diseases.

Reação de cultivares de cevada a Drechslera teres, e variabilidade patogênica de isolados do Sul do Brasil

Pesquisa Agropecuaria Brasileira, Jun 1, 2002

Reação de cultivares de cevada 775 Reação de cultivares de cevada a Drechslera teres, e variabili... more Reação de cultivares de cevada 775 Reação de cultivares de cevada a Drechslera teres, e variabilidade patogênica de isolados do Sul do Brasil (1) João Américo Wordell Filho (2) , Ariano Morais Prestes (3) e Márcio Só e Silva (4) Resumo-Objetivou-se avaliar a reação de 58 cultivares de cevada a Drechslera teres, agente causal da mancha-em-rede, bem como a variabilidade patogênica e freqüência de sintomas do patógeno. A reação das cultivares foi estimada com auxílio de uma escala de notas de 0 a 4, em que zero (0) representa a ausência de sintomas, e 4 representa os sintomas típicos da mancha-em-rede. O mesmo método foi utilizado para avaliar a variabilidade patogênica de 25 isolados oriundos do Sul do Brasil. Seis isolados de boa capacidade de esporulação foram utilizados para comparar o número de lesões e a severidade da doença. As cultivares diferiram quanto à reação a D. teres, e identificaram-se as três cultivares, BR 2, EMBRAPA 43 e PFC 8590, como fontes de resistência moderada à doença. Em testes de 25 isolados de D. teres, inoculados na concentração de 1,7x10 4 conídios/mL, detectaram-se diferenças significativas entre os isolados, evidenciando diferenças na sua virulência. Pelo sistema de nomenclatura de Limpert & Müller, foi possível diferenciar padrões de virulência de isolados oriundos de diferentes regiões do Sul do Brasil. O número de lesões e a severidade foram intimamente relacionadas com o local de origem do isolado. Termos para indexação: Hordeum vulgare, resistência a doenças, variação genética, virulência. Reaction of barley cultivars to Drechslera teres and pathogenic variability of isolates from the South of Brazil Abstract-This research aimed to evaluate 58 barley cultivars for resistance to net blotch caused by Drechslera teres and to determine the variability of isolates of the pathogen and frequency of symptoms of the disease. The cultivar reaction was estimated with aid of a 0 to 4 scale, in which zero represented the absence of symptom and 4 the typical symptoms of disease susceptibility. The same method was used to determine de pathogenic variability of isolates originated from the Southern Brazil. Six isolates of good sporulation capacity were used for comparison of number of lesions and disease severity. The cultivars showed differences in reaction to net blotch, and the cultivars BR 2, EMBRAPA 43 and PFC 8590 were identified as sources of moderate resistance to the disease. Test of 25 isolates of D. teres inoculated in concentration of 1.7x10 4 conidia/mL, evidenced significant differences among isolates regarding their virulence. Differentiated virulence patterns of isolates originated from different locations of the South of Brazil were identified by using the Limpert & Müller nomenclature system. The lesion number and severity of the disease were closely related to isolate local of origin.

Effects of fertilization on thrips and downy mildew incidence and on the yield of onion

Agropecuária catarinense, 2009

Ferrugem asiática da soja

Agropecuária catarinense, Dec 30, 2020

Hyperspectral imaging to characterize plant–plant communication in response to insect herbivory

Plant Methods, Jul 6, 2018

Background: In studies of plant stress signaling, a major challenge is the lack of non-invasive m... more Background: In studies of plant stress signaling, a major challenge is the lack of non-invasive methods to detect physiological plant responses and to characterize plant-plant communication over time and space. Results: We acquired time series of phytocompound and hyperspectral imaging data from maize plants from the following treatments: (1) individual non-infested plants, (2) individual plants experimentally subjected to herbivory by green belly stink bug (no visible symptoms of insect herbivory), (3) one plant subjected to insect herbivory and one control plant in a separate pot but inside the same cage, and (4) one plant subjected to insect herbivory and one control plant together in the same pot. Individual phytocompounds (except indole-3acetic acid) or spectral bands were not reliable indicators of neither insect herbivory nor plant-plant communication. However, using a linear discrimination classification method based on combinations of either phytocompounds or spectral bands, we found clear evidence of maize plant responses. Conclusions: We have provided initial evidence of how hyperspectral imaging may be considered a powerful noninvasive method to increase our current understanding of both direct plant responses to biotic stressors but also to the multiple ways plant communities are able to communicate. We are unaware of any published studies, in which comprehensive phytocompound data have been shown to correlate with leaf reflectance. In addition, we are unaware of published studies, in which plant-plant communication was studied based on leaf reflectance.

Primary and specialized metabolisms of Triticum aestivum L. affected by Solieria chordalis

Research Square (Research Square), Apr 13, 2023

Plant elicitation provides multi-bene ts to plant development and defense, besides helping to mak... more Plant elicitation provides multi-bene ts to plant development and defense, besides helping to make agriculture more sustainable. However, the use of wrong experimental designs and technics directly affects the results obtained. This favors the generation of biased and unreliable data. Therefore, an investigation was conducted to assess the eliciting potential of a red seaweed biostimulant (RSB) alone or in combination with fungicide in total controlled conditions on wheat (Triticum aestivum L.) plants. Catalase, superoxide dismutase, ascorbate peroxidase, phenylalanine ammonia-lyase (PAL), salicylic acid (SA) content, powdery mildew incidence, photosynthetic rates, and the water use e ciency were assessed in different periods after the application of the elicitor. The use of the RSB prevented the incidence of powdery mildew in wheat plants. The fungicide alone or in combination with the RSB resulted in negative photosynthetic rates and downregulated the activity of some enzymes. A greater PAL activity did not warrant a greater accumulation of SA in plants. Overall, the use of fungicide negatively affected wheat's primary and specialized metabolisms when compared to the application of the RSB alone.

Manejo da mancha branca na cultura do milho

DOAJ (DOAJ: Directory of Open Access Journals), Apr 1, 2020

Diagnose e manejo da ferrugem da folha, do oídio e do mosaico comum na cultura do trigo

Agropecuária catarinense, 2013

Manejo Ecolã“Gico De Doenã‡As Do Feijoeiro

Revista Brasileira de Agroecologia, Nov 12, 2006