Efeito do silicato de cálcio e da autoclavagem na supressividade e na conducividade de dois solos à Rhizoctonia solani

Rodrigues, Fabrício Á.; Corrêa, Guilherme Resende; Korndörfer, Gaspar Henrique; Santos, M. Amélia; Datnoff, L. E.

doi:10.1590/s0100-204x1999000800007

Cited by 2 publications

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References 6 publications

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“…Our findings confirmed that soil type influences not only the productive potential of crops, but also the development of Rhizoctonia root rot (Tamm et al, 2010). In a study with application of calcium silicate in two types of soils, there was a higher disease index (46.5) in the Eutrophic Structured Terra Roxa than in the rhodic acrisol (11.1), which confirmed the suppressive character of acrisol for R. solani (Rodrigues et al, 1999).…”

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confidence: 82%

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Effect of limestone dose on the incidence of Rhizoctonia root rot and soybean yield in four soil types

et al. 2022

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Rhizoctonia root rot (RRR) is a disease caused by the soilborne pathogen Rhizoctonia solani, which kills soybean plants in patches over croplands. Control is difficult because the pathogen survives in the soil and has a wide host range; therefore, cultural control methods might help to diminish disease pressure. The objective of this study was to evaluate liming as a strategy to reduce the incidence of RRR in soybean grown in four soil types: acrisol (Ac), cambisol Ta (CaTa), cambisol Tb (CaTb) and nitisol (Nit).The treatments were arranged in a factorial design of four doses of limestone (0, 3, 6 and 9 t/ha) at two sites within each field (inside and outside a Rhizoctonia patch).The incidence of RRR inside the patch was on average 40.3% whereas outside it was 1.2%. The reduction in disease incidence was 3.9%, 3.7%, 3.6% and 1.8% per 1000 kg of limestone applied for the Ac, CaTa, CaTb and Nit soils, respectively. The highest soybean yield was of 4713 and 3349 kg/ha for the Ac and Nit soils with application of 6.6 and 6.2 t/ha of limestone, respectively. Soybean yield in the cambisols increased linearly with liming, with an increase in yield of 121 and 172 kg/ha in CaTa and CaTb, respectively, for each 1000 kg of limestone applied. Thus, liming reduced the incidence of RRR in all soils and promoted better soybean nutrition, increasing soybean yield. Therefore, liming is a practice that contributes to both soil fertility and disease control.

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Section: Discussionsupporting

confidence: 82%

“…In a study with application of calcium silicate in two types of soils, there was a higher disease index (46.5) in the Eutrophic Structured Terra Roxa than in the rhodic acrisol (11.1), which confirmed the suppressive character of acrisol for R . solani (Rodrigues et al, 1999).…”

Section: Discussionmentioning

confidence: 99%

Effect of limestone dose on the incidence of Rhizoctonia root rot and soybean yield in four soil types

et al. 2022

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Severidade da podridão-radicular de Rhizoctonia do feijoeiro influenciada pela calagem, e pelas fontes e doses de nitrogênio

Rodrigues

Carvalho

Vale

2002

Pesq. agropec. bras.

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Avaliou-se o efeito da calagem e de doses e fontes de N na severidade da podridão-radicular de Rhizoctonia (PRR) em feijoeiro em condições controladas. No primeiro ensaio, utilizaram-se as doses de 0, 1,75, 2,25, 2,75, 3,25 e 3,75 g de calcário dolomítico por quilograma de solo. No segundo ensaio, os tratamentos constituíram um fatorial 2x6, ou seja: duas fontes de N (sulfato de amônio e nitrato de sódio) e seis doses de N (0, 11, 16, 21, 26 e 31 mg kg-1 de solo). A acidez do material de solo usado no segundo ensaio foi corrigida com 1,75 g de calcário por quilograma de solo. Foram colocados 16 g de grãos de arroz infestados por R. solani em cada vaso com 1 kg de material de solo. Utilizou-se, em ambos os ensaios, o delineamento inteiramente casualizado, com cinco repetições. A severidade da PRR foi avaliada 25 dias após a emergência das plantas, atribuindo-se nota para cada planta de acordo com o tamanho das lesões formadas no hipocótilo. Os dados obtidos foram usados para calcular o índice de doença (ID, %). Foram obtidas equações lineares significativas que permitiram descrever as relações entre a calagem e fontes de N com a severidade da PRR. Houve um acréscimo de 32% no ID, em virtude das doses crescentes de calcário. Após a calagem, a aplicação de sulfato de amônio reduziu em 22% o ID, enquanto o nitrato de sódio o aumentou em 18%, com relação ao controle.

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Efeito do silicato de cálcio e da autoclavagem na supressividade e na conducividade de dois solos à Rhizoctonia solani

Cited by 2 publications

References 6 publications

Effect of limestone dose on the incidence of Rhizoctonia root rot and soybean yield in four soil types

Effect of limestone dose on the incidence of Rhizoctonia root rot and soybean yield in four soil types

Severidade da podridão-radicular de Rhizoctonia do feijoeiro influenciada pela calagem, e pelas fontes e doses de nitrogênio

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