Effects of Lime Particle Size and Distribution and Fertilizer Formulation on Clubroot Disease Caused by<i>Plasmodiophora brassicae</i>

Dobson, Robin

doi:10.1094/pd-67-50

Cited by 30 publications

(11 citation statements)

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“…It was reported that the disease severity decreased when the particle size of calcium carbonate decreased, resulting in a pH increase (Dobson et al 1982). The current experiment suggested that the effects of dolomite were caused by the same factors as those of calcium carbonate, but in the case of calcium cyanamide, factors other than the effects of particle size were considered to be involved.…”

Section: Discussionmentioning

confidence: 54%

Reduction of resting spore density ofPlasmodiophora brassicaeand clubroot disease severity by liming

Murakami

Tsushima

Kuroyanagi

et al. 2002

Soil Science and Plant Nutrition

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Section: Discussionmentioning

confidence: 54%

Reduction of resting spore density ofPlasmodiophora brassicaeand clubroot disease severity by liming

Murakami

Tsushima

Kuroyanagi

et al. 2002

Soil Science and Plant Nutrition

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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.…”

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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“…12. The application of limestone was repeated 1981 Aug. 12Á13, when it was noted that soil pH with the greatest rate of application was 6.6, which was assumed to be somewhat low for minimizing clubroot disease (Dobson et al 1983) Cauliflower was grown and yields determined in 1979, 1980, 1982, 1984 and 1985. Wet weather in the spring of 1981 did not provide suitable soil conditions for timely seeding, so no crop was grown and the plot area was fallowed.…”

Section: Methodsmentioning

confidence: 99%

“…Although oats is known to be sensitive to Mn deficiency, it is not a widely grown commercial crop in coastal British Columbia. Cauliflower (Brassica oleracea L.) was selected as the test crop because it is widely grown commercially in the area, its large leaves during early growth facilitate foliar spray applications, and limestone is recommended as a method to reduce the incidence of disease called club root that is a serious problem for crucifers (Dobson et al 1983;Niwa et al 2007). Club root is caused by Plasmodiophora brassica Wor., which tends to prefer acidic soil conditions.…”

mentioning

confidence: 99%

Effects of soil limestone and foliar manganese and zinc applications on field cauliflower growth and element contents

Kowalenko¹,

Ihnat²

2010

Can. J. Soil. Sci.

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Kowalenko, C. G. and Ihnat, M. 2010. Effects of soil limestone and foliar manganese and zinc applications on field cauliflower growth and element contents. Can. J. Soil Sci. 90: 177Á188. A trial was conducted in a field where a previous study suggested that a deficiency of manganese (Mn) or zinc (Zn) was created by the application of limestone, with the objective to confirm whether lime-induced deficiency is a potential problem in coastal British Columbia acidic soils. The trial involved the application and incorporation of limestone at two rates (9 and 19 Mg ha(1 ) in addition to a control with no limestone, and five foliar applications of Mn and Zn. The foliar applications included a control, Mn at two rates (2.3 and 4.5 kg ha ) and a combination of Mn and Zn, both at 2.3 kg ha 1 . The trial was conducted at the same location over seven growing seasons (1979Á1985), with the cauliflower grown in five of those years. The plot was fallowed in 1981 and 1983. The limestone treatments were applied in the spring of 1979, and again in the summer of 1981, while the foliar applications were applied to the plant each cropped season. Limestone increased plant dry matter yield in three years, decreased it in one, and had no effect in the other. The micronutrient applications did not affect dry matter yield in any of the years. Chemical analyses on the plants showed that limestone increased Ca and decreased Mn and Zn concentrations. The foliar applications increased plant Mn and Zn concentrations. Limestone, but not the micronutrient, applications influenced other element concentrations, with decreased concentrations of potassium, magnesium, sodium, strontium and rubidium. Iron and copper concentrations were not influenced by limestone applications. The decreased concentrations of nutrients could not account for the yield reduction by limestone applications in the one year, since concentrations of the nutrients measured in that year were not significantly different to concentrations in years when yields were increased. Further, basal applications of nutrients (nitrogen, phosphorus, potassium, magnesium and boron) had been applied to ensure that non-treatment nutrients were not deficient. Although monthly weather conditions were similar for one year of increased yield and one year of decreased yield, the influence of weather on the variable response by the crop could not be discounted as there could have been adverse weather conditions at critical stages of plant growth. Strontium and rubidium tended to respond to limestone similar to calcium and potassium, showing that their measurements have potential to further evaluate nutrient dynamics since they have characteristics similar to calcium and potassium, respectively. This field trial showed that limestone applications had many and variable effects on the availability of numerous nutrients and associated elements on cauliflower in addition to Mn and Zn. This showed the high degree of complexity of limestone applications on acidic soils.

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Effects of Lime Particle Size and Distribution and Fertilizer Formulation on Clubroot Disease Caused byPlasmodiophora brassicae

Cited by 30 publications

References 0 publications

Reduction of resting spore density ofPlasmodiophora brassicaeand clubroot disease severity by liming

Reduction of resting spore density ofPlasmodiophora brassicaeand clubroot disease severity by liming

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

Effects of soil limestone and foliar manganese and zinc applications on field cauliflower growth and element contents

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