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

Rodrigues, Fabrício Á.; Carvalho, Enia Mara de; Vale, Francisco

doi:10.1590/s0100-204x2002000900007

Cited by 16 publications

(11 citation statements)

References 14 publications

(18 reference statements)

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“…In many instances, disease severity is a consequence of problems such as inadequate fertility (Rodrigues et al, 2002), incorrect pH, soil compaction, poor drainage, herbicide injury (Reichard et al, 1997;Harikrishnan & Yang, 2002) and high levels of nematode infestation (Rodriguez-Kábana et al, 1994). Correcting these problems is the first step towards disease management in soybean (Hartman et al, 1999).…”

Section: Victor Dos Reis Pinheiromentioning

confidence: 99%

Development of Sclerotium rolfsii sclerotia on soybean, corn, and wheat straw, under different soil temperatures and moisture contents

Pinheiro

Seixas

Godoy

et al. 2010

Pesq. agropec. bras.

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-The objective of this work was to evaluate the effect of moisture and temperature on the development of Sclerotium rolfsii on soybean, corn, and wheat straw. Wheat straw produced the lowest number of sclerotia. Intermediate soil moisture level (70% of field capacity), and temperatures ranging between 25-30 o C favored sclerotia development. No sclerotia were formed at temperatures between 30-35 o C, on any type of straw.

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Section: Victor Dos Reis Pinheiromentioning

confidence: 99%

Development of Sclerotium rolfsii sclerotia on soybean, corn, and wheat straw, under different soil temperatures and moisture contents

Pinheiro

Seixas

Godoy

et al. 2010

Pesq. agropec. bras.

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“…Dobson et al (1983) também verificaram em plantas de couve chinesa que a incidência da doença foi maior com o uso do sulfato de amônio, com ou sem calcário, e o nitrato de cálcio reduziu a severidade, por ser capaz de aumentar o pH do solo e da (Huber & Thompson, 2007). Por exemplo, Rodrigues et al (2002) verificaram que o uso do nitrogênio na forma nítrica contribuiu mais para o aumento da podridão-radicular causado pela Rhizoctonia em feijoeiro, que a fonte amoniacal. Houve efeito significativo entre os fatores fontes de N e pH do solo e sua interação no conteúdo de N, Ca e B na parte aérea das plantas.…”

Section: Influência De Fontes De Nitrogênio E Do Ph Do Solo No Controunclassified

Influência do boro, de fontes de nitrogênio e do pH do solo no controle de hérnia das crucíferas causada por Plasmodiophora brassicae

Ruaro¹,

Neto²,

Júnior³

2009

Trop. plant pathol.

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RESUMOO efeito de doses de boro (B) e de fontes de nitrogênio (N) em diferentes níveis de pH do solo no controle de Plasmodiophora brassicae, agente causal da hérnia das crucíferas foi avaliado, em solo artificialmente infestado com o patógeno, imediatamente após o transplante das mudas. O B foi aplicado dissolvido em 10 mL de água e incorporado em cada vaso no dia anterior ao plantio das mudas, nas doses de B: 0; 5; 10; 20 e 30 mg.kg -1 de solo em três níveis de pH do solo: 5,5; 6,2 e 7,3. As fontes de N testadas foram: sulfato de amônio, uréia e nitrato de cálcio, aplicadas em solo com dois níveis de pH: 5,5 e 7,3. Foi utilizado 25 mL de suspensão com 2,5 x 10 7 ml -1 esporos de repouso do patógeno, aplicada no colo de cada planta, no transplante das mudas. Aos 45 dias após a inoculação foram realizadas as avaliações. A severidade da doença foi maior (70%) com doses de B menores que 10 mg.kg A severidade da doença foi maior (70%) com doses de B menores que 10 mg.kg (70%) com doses de B menores que 10 mg.kg com doses de B menores que 10 mg.kg -1 e pH menor que 6,0. A menor severidade severidade (26%) foi verificada em pH maior que 6,5 com 10 a 30 mg.kg -1 de B. A severidade da doença foi menor quando o nitrato de cálcio foi utilizado em solo com pH 6,5 do que em outros tratamentos. Observou-se correlação negativa entre os teores foliares de N, Ca, Mg e B Observou-se correlação negativa entre os teores foliares de N, Ca, Mg e B e a severidade da doença. Os resultados obtidos indicaram que o plantio em solo com pH maior que 6,5 associado à aplicação de 10 a 30 mg.kg -1 de boro e o uso do nitrato de cálcio como fonte de adubação nitrogenada apresentam resultados positivos na redução da doença. Palavras-chave: controle cultural, galha, nutrição mineral, Brassica rapa var. pekinensis. ABSTRACT Influence of boron, nitrogen sources and soil pH on the control of club root of crucifers caused by Plasmodiophora brassicaeEffects of Boron (B) doses and nitrogen sources (N) at different levels of soil pH on the control of clubroot was investigated in transplants of chinese cabbage grown in pots containing field soil.. B dissolved in water was applied at 0, 5, 10, 20 and 30 mg.kg -1 of soil of pH 5.5, 6.2 and 7.3 on the day before transplanting. N sources tested (ammonium sulfate, urea and calcium nitrate) were applied to soil of pH 5.5 and 7.3. Seedlings were inoculated with a suspension of resting spores of the pathogen at transplanting and assessed for clubroot severity after 45 days. The disease was severe (70%) when the B dose was less than 10 mg.kg -1 and the pH less than 6.0, but milder (26%) when the B dose was 10 to 30 mg.kg -1 soil at pH values higher than 6.5. Clubroot was least severe when calcium nitrate was used in soil of pH 6.5. Clubroot severity correlated negatively with concentrations of N, Ca, Mg and B in the foliage. We conclude that use of 10 to 30 mg.kg -1 boron and calcium nitrate in soil of pH 6,5 or 7,3 was effective in reducing club root severity . Keywords: cultural control, gall, mineral nutritio...

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“…It may be possible that the soil pH correction with lime contributed to the high incidence of fusariosis in this unit. This has been described by Rodrigues et al (2002), in which the use of limestone favoured the development of Rhizoctonia solani in beans. However, the level of nitrogen may have been excessive for the pineapple plants, thus increasing their susceptibility to F. guttiforme.…”

Section: Resultsmentioning

confidence: 93%

Effect of temperature and photoperiod on the development of fusariosis in pineapples

Ferreira¹,

Sales²,

Araújo³

2015

Afr. J. Agric. Res.

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We examined the incidence of fusariosis in Montes Claros-MG and determined the effect of temperature and photoperiod on the development of Fusarium guttiforme. Four family production units were investigated, from which four isolates of F. guttiforme were isolated. For each isolate, two experiments were set up to assess mycelial growth for 144 h in environments with different temperatures and either a 12 h photoperiod or continuous darkness. To evaluate the development of isolates of F. guttiforme, we used a portion sub-divided randomized block design. The number of conidia produced by each isolate was counted according to the above-mentioned conditions. All production units had occurrence rates ranging from 12.2 to 64.4%. The fungal isolates showed a higher mycelial growth rate when incubated at 25°C under a 12 h photoperiod. However, the production of conidia varied depending on the temperature and on the isolate. With these overall results better understand how the spread of this fungus occurred so quickly. We may use this information to suggest management practices that reduce the incidence of pineapple fusariosis.

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

Cited by 16 publications

References 14 publications

Development of Sclerotium rolfsii sclerotia on soybean, corn, and wheat straw, under different soil temperatures and moisture contents

Development of Sclerotium rolfsii sclerotia on soybean, corn, and wheat straw, under different soil temperatures and moisture contents

Influência do boro, de fontes de nitrogênio e do pH do solo no controle de hérnia das crucíferas causada por Plasmodiophora brassicae

Effect of temperature and photoperiod on the development of fusariosis in pineapples

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