Fertilização silicatada na severidade de brusone e na incidência de insetos-praga em arroz irrigado

Santos, A. B. dos; Prabhu, A. S.; Ferreira, E.; Fageria, N. K.

doi:10.1590/s1415-43662009000500005

Cited by 6 publications

(4 citation statements)

References 14 publications

(20 reference statements)

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“…A presença desse elemento é também expressiva em solos desenvolvidos de serpentinitos e itabirito. O teor diferencial desse metal nesses materiais de origem parece ser determinante dessas tendências nos solos (Curi, 1983;Monteiro, 2005;Santos et al, 2009). …”

Section: Resultados E Discussão Extrações De Mn Na Terra Fina E Argilaunclassified

Óxidos de manganês em solos do quadrilátero ferrífero (MG)

Filho

Curi

Marques

et al. 2011

Rev. Bras. Ciênc. Solo

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RESUMOA mineralogia dos óxidos de Mn é muito variada e complexa, devido ao grande número de minerais e ao conhecimento inexato de algumas de suas estruturas. Devido à escassez de trabalhos que tratam especificamente de óxidos de Mn em solos brasileiros e seu conteúdo muito elevado em alguns solos do Quadrilátero Ferrífero (MG), este estudo objetivou caracterizar a química e a mineralogia desses óxidos nos solos dessa região, estratificando-os conforme os materiais de origem e posições na paisagem. O trabalho foi desenvolvido em uma área representativa do Quadrilátero Ferrífero, referente à Área de Proteção Ambiental da Região Metropolitana de Belo Horizonte -APA Sul RMBH, com extensão de 1.625,32 km 2 ; a amostragem foi direcionada para a caracterização de solos com elevado teor de Mn, relacionados a três materiais de origem distintos: itabiritos, dolomitos ferruginosos e serpentinitos, tendo sido incluídos ainda alguns solos provenientes de outros materiais de origem, dentro do Quadrilátero. Alguns solos do Quadrilátero Ferrífero possuem teores de Mn na fração terra fina extraordinariamente elevados, principalmente aqueles relacionados aos dolomitos ferruginosos da Formação Gandarela. Foram identificados diversos minerais de Mn na fração argila dos solos, sem quaisquer pré-tratamentos de concentração, representados por todoroquita, litioforita e, ainda, pirolusita. A influência do material de origem no contexto deste estudo foi superior àquela da posição na paisagem e grau de intemperismo de solos ricos em Mn.Termos de indexação: caracterização química, mineralogia, todoroquita, litioforita, pirolusita, solos ricos em Mn.

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Section: Resultados E Discussão Extrações De Mn Na Terra Fina E Argilaunclassified

Óxidos de manganês em solos do quadrilátero ferrífero (MG)

Filho

Curi

Marques

et al. 2011

Rev. Bras. Ciênc. Solo

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“…Many studies have shown that silicon prevents and/ or delays the penetration of the pathogen through the formation of a mechanical barrier, composed of amorphous silica, depoused between the cuticle layer and the epidermis layer, in foliar cells, and also acts by systematically inducing the production of defense enzymes and proteins [45][46][47][48]. Other studies showed that bioagents act effectively on plant resistance to diseases, being able to control pathogens by antibiosis, parasitism, by competition of nutrients, producing enzymes that degrade pathogen structures and together activating latent defense mechanisms, inducing resistance in plants [28,29,49].…”

Section: Discussionmentioning

confidence: 99%

Silicon rates and beneficial microorganism on blast suppression and productivity of upland rice

Souza¹,

Filippi²,

Nascente³

et al. 2021

J Plant Sci Phytopathol

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One of the primary constraints in upland rice cultivation is the disease blast (Magnaporthe oryzae), which can provide reduction up to 100% of the grain yield The use of silicon with beneficial microorganisms (bioagents) can be an alternative for the control of this disease and to provide an increase in the productivity of the rice grain. The objective of this work was to study the effect of rates of silicon with bioagents in blast suppression and grain yield of upland rice. The methodology used was tests carried out in field conditions, in two different areas: Capivara and Palmital farms, during the growing season 2015/2016. The experimental design was in a split-plot scheme with four replications. In the main plots were the silicon fertilization rates (0, 2, 4 and 8 ton ha-1) and in the subplots was the bioagents (1-without bioagents, 2-Pseudomonas fluorescens, 3-Burkholderia pyrrocinia, 4-Trichoderma asperellum, 5-a mixture of the three bioagents). The results showed that the use of 2 ton ha-1 of silicon with a mixture of bioagents was the best treatment to control leaf blast. Besides, from rates, 2 to 6 ton ha-1 of silicon in Capivara Farm and up to 8 ton ha-1 of silicon in Palmital Farm provided the highest grain yield. A mixture of bioagents provided the highest grain yield. In this sense, it was concluded that the best recommendation to connect blast control, grain yield and reduced amount of silicon was the use of 2 ton ha-1 of silicon with the mixture of bioagents.

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“…It is important to observe that, though the importance of the chemical control, some alternative strategy for avoiding the excessive dependence of fungicides such as silicon use through silicate correctives in the soil has been studied as a possible auxiliary strategy of the disease control. Some research results indicate that the silicon would create a mechanic barrier to the fungus penetration (SANTOS et al, 2009;DATNOFF et al, 1997). FILIPPI et al (2007) verified in an experiment in a greenhouse, in spraying plants 18 days after the emergence with an isolated avirulent of Magnaporthe oryzae, induction of resistance to the virulent fungus, associated with a significant decrease of the disease severity.…”

Section: Rice Blast -Magnaporthe Grisea (Pyricularia Grisea = Pyriculmentioning

confidence: 92%

Blast disease in rice culture

Soares¹,

Raphael²,

Bortolotto³

et al. 2014

Revista Brasileira De Tecnologia Aplicada Nas Ciências Agrárias

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Rice culture can suffer great damages due to fungal diseases which affect seeds, roots, leaves and panicles, among which the blast disease stands out. In this context, the chemical control through fungicide use takes a key role, promoting healing, protecting and eradicative effects of the disease. The great majority of fungicides recommended include active ingredients of systemic action ways, that is, capable of penetrating and moving inside plants, being able to exert its effect in a different location from that applied. This study presents a review about the systemic fungicide use for blast disease control. For this disease, there are 25 registered commercial products which include 12 different active ingredients, considering seed treatment and foliar application, involving a total of 6 distinct ways of systemic action. The treatment with systemic fungicides has been shown efficient in chemical control for promoting healing, protecting and eradicating effects of the disease.

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Fertilização silicatada na severidade de brusone e na incidência de insetos-praga em arroz irrigado

Cited by 6 publications

References 14 publications

Óxidos de manganês em solos do quadrilátero ferrífero (MG)

Óxidos de manganês em solos do quadrilátero ferrífero (MG)

Silicon rates and beneficial microorganism on blast suppression and productivity of upland rice

Blast disease in rice culture

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