Band incorporation of fluazinam (Shirlan) into soil to control clubroot of vegetable brassica crops

Donald, E. C.; Porter, Ian; Lancaster, R. A.

doi:10.1071/ea00135

Cited by 34 publications

(15 citation statements)

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“…for seed potato production), pesticide or fumigant application to the soil may be justified either before or during the planting operations. Improved techniques for targeted, low rate, pesticide applications (rather than broadcast treatments), similar to those recently developed for control of clubroot of vegetable brassicas (Donald et al 2001) could have a place in these situations.…”

Section: Pre-planting Field Management With Soil-applied Chemicalsmentioning

confidence: 99%

Control of Powdery Scab of Potato: Towards Integrated Disease Management

Falloon

2008

Am. J. Pot Res

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Powdery scab of potato, caused by the plasmodiophorid pathogen Spongospora subterranea f. sp. subterranea, is an increasingly important disease where potatoes are grown in cool/temperate regions. Powdery scab lesions on tubers downgrade their quality as seed, fresh vegetable or processing potatoes, and the disease can severely harm crop productivity. Aspects of the biology of S. subterranea, including long-term persistence in soil, high and rapid reproductive potential, and, possibly, ability to infect alternative hosts, pose considerable problems for development of effective control of powdery scab. Methods shown to reduce the incidence and severity of the disease are reviewed. These include field choice and crop rotation, pathogen detection, use of resistant cultivars, planting disease-and pathogen-free seed tubers, appropriate pesticide treatments for seed tubers and/or infested soil, adjustment of soil nutrient status, and use of suitable management practices during crop growth. No single method is likely to give complete control of powdery scab, particularly where S. subterranea inoculum levels are high on seed tubers or in soil. Effective disease management will therefore depend on implementation of several appropriate methods, using an integrated approach to powdery scab control. This requires understanding of the biology of S. subterranea, and comprehensive and conscientious adherence to appropriate disease control methods during most stages of the potato crop management cycle.

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Section: Pre-planting Field Management With Soil-applied Chemicalsmentioning

confidence: 99%

Control of Powdery Scab of Potato: Towards Integrated Disease Management

Falloon

2008

Am. J. Pot Res

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“…The pathogen typically causes the formation of club-shaped tumor-like growths on both tap and lateral roots, and occasionally on the base of the stem, in affected plants. Control measures, such as soil fumigation, application of fungicides (7,24) and surfactants (9), and supplemental calcium and liming to increase soil pH (18) may reduce disease pressure, but are not always sufficient to keep the crops healthy. Consequently, yield losses are inevitable if symptoms are severe.…”

Section: Molecular Detection Of Plasmodiophora Brassicae Causal Agenmentioning

confidence: 99%

Molecular Detection of Plasmodiophora brassicae, Causal Agent of Clubroot of Crucifers, in Plant and Soil

2007

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Clubroot of crucifers, caused by Plasmodiophora brassicae, recently has been identified in canola (Brassica napus) fields in Alberta, Canada. An effective strategy for managing the disease is to avoid planting cruciferous crops in P. brassicae-infested soil, because the pathogen produces resting spores that can remain infectious for many years. A simple, one-step polymerase chain reaction (PCR) protocol was developed to detect the pathogen in plant and soil samples. The primers TC1F and TC1R, based on a P. brassicae partial 18S ribosomal RNA (rRNA) gene sequence from GenBank, yielded a 548-bp product in the optimized PCR. A second pair of primers, TC2F and TC2R, which amplified a fragment of the 18S and internal transcribed spacer (ITS) 1 regions of the rDNA repeat, also was tested and produced a 519-bp product. Neither set of primers amplified any DNA fragment from noninfected plant hosts, noninfested soil, or common soil fungi and bacteria tested in this study. Quantities of 100 fg or less of total P. brassicae DNA, or 1 × 103 resting spores per gram of soil, could be detected consistently using these primers and PCR protocol, corresponding to an index of disease of 11% or lower when the soil was bioassayed. The protocol also enabled detection of P. brassicae in symptomless root tissue 3 days after inoculation with the pathogen. Therefore, the PCR assay described in this study could provide a reliable diagnosis for routine detection of P. brassicae in plant and soil materials in a specific and rapid manner.

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“…Amendment with lime to increase soil pH (Donald & Porter, 2009), and application of fungicides (Shimotori et al. , 1996; Donald et al. , 2001; Mitani et al.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the impact of resistant and susceptible canola on Plasmodiophora brassicae inoculum potential

et al. 2012

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The impact on clubroot severity of growing susceptible canola or mixtures of resistant and susceptible canola genotypes was examined. Bioassays revealed greater clubroot severity and incidence, and reduced plant height, where 100% of a susceptible cultivar had been grown. A higher proportion of susceptible plants within a resistant canola crop increased root hair and secondary infections. Regression analysis of root hair infection and the amount of Plasmodiophora brassicae DNA (as determined by quantitative PCR) revealed strong linear relationships between the two parameters. The linear relationships between root hair infection and P. brassicae DNA were stronger for the resistant cultivar than for the susceptible cultivar when regression analysis was conducted by cultivar over the sampling dates. In conclusion, the cropping of a resistant cultivar reduced clubroot severity, while the presence of susceptible volunteer canola increased inoculum potential. Quantitative PCR was a reliable tool for the quantification of root hair infection.

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Band incorporation of fluazinam (Shirlan) into soil to control clubroot of vegetable brassica crops

Cited by 34 publications

References 1 publication

Control of Powdery Scab of Potato: Towards Integrated Disease Management

Control of Powdery Scab of Potato: Towards Integrated Disease Management

Molecular Detection of Plasmodiophora brassicae, Causal Agent of Clubroot of Crucifers, in Plant and Soil

Assessment of the impact of resistant and susceptible canola on Plasmodiophora brassicae inoculum potential

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