Bacillus thuringiensis Combined With Fungicide Applications in the Management of Soybean Leaf Diseases

Müller, Mônica Anghinoni; Klosowski, Ana Cláudia; Pria, Maristella Dalla; Mazaro, Sérgio Miguel; Mio, Louise Larissa May De

doi:10.5539/jas.v11n13p226

Cited by 5 publications

(11 citation statements)

References 36 publications

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“…5,12 Isolates of different Bacillus species have controlled foliar diseases of soybean when mixed with chemical fungicides. 16,17 However, here we evidenced for the first time the activity of B. subtilis against multiple soybean diseases and demonstrated possible moments to correctly apply the BBP and efficiently protect the plant. The use of biocontrol products as a biological multisite has been suggested as an eco-friendly option to reduce plant pathogens.…”

Section: Discussionmentioning

confidence: 73%

“…The use of biocontrol products as a biological multisite has been suggested as an eco-friendly option to reduce plant pathogens. 12,16,17 The formulated B. subtilis BV02 used in this work proved to be compatible with most of the evaluated chemical fungicides when applied before or even along with them.…”

Section: Discussionmentioning

confidence: 75%

“…This BBP consists of bacterial cells, metabolites and enzymes produced by the microorganism, which act in the defense of the plant by different mechanisms 15 . However, few studies describe how foliar application of the BBP affects soybean foliar diseases within integrated disease management along with chemical fungicides 16,17 . It is crucial to identify the appropriate moment to apply the BBP within a conventional fungicide program aiming for a suitable management of soybean diseases.…”

Section: Introductionmentioning

confidence: 99%

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Integrating a Bacillus‐based product with fungicides by foliar application to protect soybean: a sustainable approach to avoid exclusive use of chemicals

Santos

Viera

Camargo

et al. 2022

Pest Management Science

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BACKGROUND Biological control is widely applied against soybean (Glycine max L.) soil‐borne pathogens by furrow or seed treatments. The efficiency of bioproducts and timing of application by foliar sprays against soybean pathogens needs to be more fully understood. This work investigated the efficiency of foliar application with a Bacillus subtilis‐based product (BBP) to protect soybean from multiple pathogens and the best moment to apply it considering its compatibility with fungicides. RESULTS Foliar applications (from stages V6 to R4) with BBP, mancozeb (M) and systemic fungicides (S) applied against Asian rust (Phakopsora pachyrhizi), BBP followed by S (BBP‐S), BBP along with S (S + BBP), S along with M (S + M) or water were carried out in a soybean field for two years. The treatments S + BBP, S + M and BBP‐S reduced the severity of Asian rust by 82% compared to the control. Except for M, all treatments reduced the severity of other foliar diseases by >60%. The defoliation was reduced by BBP and BBP‐S, whereas the yield was 25% higher than control by using BBP, S + M, S + BBP or BBP‐S. Also, the incidence of Fusarium sp. was significantly reduced on seeds from treatments BBP and BBP‐S. The compatibility tests in Petri dishes demonstrated that all fungicides decreased the bacterial growth when applied along with BBP, whereas previous applications of BBP did not reduce the bacterial growth. CONCLUSIONS The BBP protected soybean against multiple pathogens, reduced defoliation and promoted soybean yield similarly to conventional fungicides, but in general, the early application of the BBP was the most efficient protection. © 2022 Society of Chemical Industry.

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Section: Discussionmentioning

confidence: 73%

Section: Discussionmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Integrating a Bacillus‐based product with fungicides by foliar application to protect soybean: a sustainable approach to avoid exclusive use of chemicals

Santos

Viera

Camargo

et al. 2022

Pest Management Science

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“…O Tratamento 4, em que foi realizada a aplicação de Bioma Fx® associado à primeira e segunda aplicação de fungicida, foi o que apresentou maior sanidade de folhas no final do ciclo da cultura, com menor área abaixo da curva de progresso da as aplicações do produto a base de B. subtilis nas fases iniciais da cultura proporcionam uma maior sanidade das folhas. Esses dados são semelhantes aos encontrados em um estudo desenvolvido por Müller et al, (2019), o qual foi aplicado na cultura da soja um produto comercial a base de Bacillus thuringiensis. Os autores observaram que a área abaixo da curva de progresso da doença (AACPD) para o oídio foi menor quando esse produto foi combinado com fungicida químico.…”

Section: Resultados E Discussõesunclassified

Indutor de resistência associado à fungicidas para controle de doenças na cultura da soja / Resistance inducer associated with fungicides for disease control in soybean crops

Schott¹,

Michelon²,

Junges³

et al. 2021

BJDV

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Tendo em vista a dificuldade de controle das doenças na cultura da soja, bem como a importância desta para o cenário agrícola brasileiro, é importante elevar a eficiência dos métodos de controle adotados, associando o clássico controle químico com o uso de indutores de resistência biológicos. Este trabalho teve por objetivo avaliar a associação de um produto comercial, indutor de resistência à base de Bacillus subtilis, combinado às aplicações de fungicidas na cultura da soja. O experimento foi conduzido à campo, em área irrigada, com avaliação dos índices de doenças na cultura da soja no ano agrícola 2019/20. Foi avaliada a severidade de doenças na cultura da soja, em avaliações semanais, utilizando escala diagramática. A produtividade foi avaliada ao final do ciclo da cultura obtendo-se a produção por área. Apesar dos fatores climáticos não terem sido favoráveis ao desenvolvimento de doenças, este trabalho demonstra a importância da adoção de medidas de controle de doenças na cultura da soja na manutenção da sanidade das folhas e produtividade da cultura, assim como o uso do indutor de resistência proporcionou uma menor incidência de doenças quando aplicado no estágio vegetativo e incremento de produtividade quando aplicado no estágio reprodutivo.

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“…The use of pesticides can cause damage to the environment, leading to environmental imbalance and selection of fungicide resistant fungal populations, in addition to raising the crop production's cost (Tupich et al, 2017). The reduction or elimination of pesticides in disease control is an economic and environmental necessity (Müller et al, 2019;Thadani & Rocha, 2019).…”

Section: Introductionmentioning

confidence: 99%

Alternative Products to Control Soybean Downy Mildew in the Field

Gabardo¹,

Pria²,

Silva³

et al. 2020

JAS

Self Cite

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Soybean mildew caused by Oomycota Peronospora manshurica, is a disease widely spread in Brazil. In order to study the efficiency of soybean mildew control due to the application of alternative products and fungicide in the field, experiments were conducted in Ponta Grossa, PR, Brazil, during the 2013/2014 and 2014/2015 growing seasons. The design used was randomized blocks with four replications. The treatments were: 1-witness; 2-acibenzolar-S-methyl; 3-calcium; 4-micronutrients: copper, manganese and zinc; 5-micronutrients: manganese, zinc and molybdenum; 6-NK fertilizer; 7-Ascophyllum nodosum and 8-azoxystrobin + cyproconazole with the addition of Nimbus adjuvant. Four applications of alternative products (phenological stages V3, V6, R1 and R5.1) and two of fungicide (phenological stages R1 and R5.1) were performed. The mildew severity was estimated using a diagrammatic scale. The severity data made it possible to calculate the area under the disease progress curve (AUDPC). In the 2014/2015 harvest the disease was more severe. The control of downy mildew by the use of fungicide did not reduce the epidemic. The fungicide was not efficient in the two evaluated seasons. All tested alternative products reduced the disease severity and AUDPC in both seasons. The best results in reducing downy mildew were found with the application of acibenzolar-S-methyl, micronutrients (Cu, Mn, Zn) and A. nodosum.

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Bacillus thuringiensis Combined With Fungicide Applications in the Management of Soybean Leaf Diseases

Cited by 5 publications

References 36 publications

Integrating a Bacillus‐based product with fungicides by foliar application to protect soybean: a sustainable approach to avoid exclusive use of chemicals

Integrating a Bacillus‐based product with fungicides by foliar application to protect soybean: a sustainable approach to avoid exclusive use of chemicals

Indutor de resistência associado à fungicidas para controle de doenças na cultura da soja / Resistance inducer associated with fungicides for disease control in soybean crops

Alternative Products to Control Soybean Downy Mildew in the Field

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