Efeito do silicato de potássio isoladamente ou em mistura com fungicida no controle da requeima da batateira

Duarte, Henrique da Silva Silveira; Zambolim, Laércio; Rodrigues, Fabrício Ávila; Rios, Jonas Alberto

doi:10.1590/s0100-54052008000100014

Cited by 9 publications

(7 citation statements)

References 6 publications

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“…When the fungicide mancozeb was mixed with potassium silicate at 1.2 kg/ha, the progress of soybean rust was not affected. A similar result was found with potassium silicate alone or mixed with mancozeb + cymoxanil on the control of late blight of potato (Duarte et al, 2008) and with "Calda Viçosa" (a mixture of copper and micronutrients) to control ramularia leaf spot on cotton (Aquino et al, 2008). On the other hand, Rodrigues et al (2009) reported decreased soybean rust severity by foliar application of potassium silicate at rates ranging from 8 to 60 g/L.…”

Section: Rust Caused By the Fungus Hemileia Vastatrixsupporting

confidence: 72%

Effect of foliar application of potassium silicate on the progress of coffee leaf rust

Lopes¹,

Zambolim²,

Neto³

et al. 2013

Trop. plant pathol.

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In order to evaluate the effect of potassium silicate spray on the control of coffee leaf rust and coffee yield, an experiment was conducted during the 2005/2006 and 2006/2007 growing seasons on Coffea arabica cv. Catuaí Vermelho IAC 144, in a location situated at an elevation of 850 m in Coimbra, Minas Gerais, Brazil. The treatments consisted of: 1 -potassium silicate; 2 -potassium silicate + copper hydroxide; 3 -copper hydroxide; 4 -epoxiconazole formulated with pyraclostrobin and 5 -control treatment. Six applications of potassium silicate and copper hydroxide were made twice per month from December to March of each year. Two applications of the systemic fungicide were done in December and March of each year. Potassium silicate alone or in combination with copper hydroxide was not efficient in reducing coffee leaf rust incidence and increasing yield under high incidence of coffee leaf rust.

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Section: Rust Caused By the Fungus Hemileia Vastatrixsupporting

confidence: 72%

Effect of foliar application of potassium silicate on the progress of coffee leaf rust

Lopes¹,

Zambolim²,

Neto³

et al. 2013

Trop. plant pathol.

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“…Os tratamentos T3 e T5 não apresentaram efeito no controle da ferrugem da folha, demonstrando, assim, que a aplicação foliar de SP e de KOH, nas doses e no número de aplicações utilizados, não foram eficientes na redução da severidade dessa doença nos cultivares avaliados (Tabela 1). Resultado similar ocorreu em experimentos realizados com batateira e tomate industrial, sob condições favoráveis para ocorrência da requeima, em que a aplicação foliar de SP não controlou a doença , Duarte et al, 2008. Em cafeeiro, a aplicação foliar de SP também não foi eficiente no controle da ferrugem, mesmo em curto intervalo de aplicação (15 dias) (Neto et al, 2007).…”

Section: Resultsunclassified

Efeito da aplicação foliar de silicato de potássio e de fungicida na severidade da ferrugem da folha e da mancha amarela do trigo

2013

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Effect of foliar application of potassium silicate and fungicide on the severity of leaf rust and yellow leaf spot in wheatThe occurrence of diseases such as leaf rust (Puccinia triticina) and yellow spot (Drechslera tritici-repentis) can decrease wheat yield. This study aimed to evaluate the effect of foliar application of potassium silicate (PS) and fungicide on the control of leaf rust and yellow spot in the cultivars Safira and Quartzo. The experiment was carried out in a randomized complete block split-split plot design with four replications. The cultivars were randomly assigned to the main plot, and in the subplots, the treatments T1 -control, T2 -fungicide (azoxystrobin 60 g a.i/ha + ciproconazole + 24 g a.i/ha) sprayed at the growth stages 45 (booting) and 58 (heading), T3 -PS (40 g/L) sprayed at growth stages 45 and 58, T4 -PS (40 g/L) and fungicide sprayed, respectively, at growth stages 45 and 58 and T5 -potassium hydroxide (6.5 g/L) sprayed in the growth stages of 45 and 58. The volume used in the sprays was 250 L/ha. The evaluation of leaf rust and yellow spot severity started at 7 days after the first spraying and then every week, in a total of five assessments. Data of disease severity were used to calculate the area under leaf rust progress curve (AULRPC) and the area under yellow spot progress curve (AUYSPC). The PS, at the rate and the number of sprayings, was not efficient to decrease both AUYSPC and AULRPC in the two cultivars.

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“…No entanto, a cultura é muito suscetível a diversas doenças que, a depender das condições climáticas e de manejo, podem reduzir drasticamente a produtividade (Duarte et al, 2008).…”

Section: Introductionunclassified

Produtividade, qualidade de tubérculos e incidência de doenças em batata, influenciados pela aplicação foliar de silício

Soratto

Fernandes

Crusciol

et al. 2012

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar o efeito da aplicação de silício por via foliar, na forma de ácido silícico estabilizado, sobre a incidência de doenças, produtividade e qualidade de batata. Foram realizados três experimentos: um com a cultivar Agata e outro com a Atlantic, em Botucatu, SP; e um com a cultivar Agata, em Itaí, SP. Utilizou-se delineamento de blocos ao acaso, com oito repetições. Os tratamentos consistiram de: testemunha (sem aplicação de Si) e aplicação de Si via foliar, na dose 2 L ha -1 , de produto comercial com 0,8% de Si solúvel como concentrado estabilizado de ácido silícico. A dose de Si foi parcelada em quatro aplicações durante o ciclo da cultura. A aplicação de Si reduz a severidade da requeima e a incidência de canela-preta, além de aumentar a produtividade e o teor de matéria seca dos tubérculos. O fornecimento de Si via foliar aumenta a produtividade de tubérculos, independentemente de seus efeitos sobre a incidência de doenças.Termos para indexação: Pectobacterium, Phytophthora infestans, Solanum tuberosum, ácido silícico estabilizado, adubação foliar, requeima. Yield, tuber quality, and disease incidence on potato crop as affected by silicon leaf applicationAbstract -The objective of this work was to evaluate the effects of silicon leaf application, in the form of stabilized silicic acid, on the disease incidence, yield, and quality of potato. Three experiments were carried out: one with the cultivar Agata and another with Atlantic, in Botucatu, SP, Brazil; and one with the cultivar Agata, in Itaí, SP. A randomized complete block design was used, with eight replicates. The treatments consisted of: a control (without Si) and Si foliar spraying at 2 L ha -1 of a commercial product containing 0.8% of soluble Si as concentrated, stabilized silicic acid. The silicon dose was split in four applications during the crop cycle. Silicon application reduces the severity of late blight and the incidence of blackleg, besides increasing tuber yield and tuber dry matter content. Leaf-supplied silicon increases potato tuber yield, regardless of its effect on disease incidence.

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Efeito do silicato de potássio isoladamente ou em mistura com fungicida no controle da requeima da batateira

Cited by 9 publications

References 6 publications

Effect of foliar application of potassium silicate on the progress of coffee leaf rust

Effect of foliar application of potassium silicate on the progress of coffee leaf rust

Efeito da aplicação foliar de silicato de potássio e de fungicida na severidade da ferrugem da folha e da mancha amarela do trigo

Produtividade, qualidade de tubérculos e incidência de doenças em batata, influenciados pela aplicação foliar de silício

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