Interaction of solarization, fumigation, and totally impermeable film for the management of clubroot (<i>Plasmodiophora brassicae</i>) on brassica crops

McDonald, Mary Ruth; Gossen, B. D.; Robson, Justin; Al-Daoud, Fadi

doi:10.17660/actahortic.2020.1270.17

Cited by 5 publications

(2 citation statements)

References 14 publications

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“…Soil fumigants have been shown to be highly effective against clubroot (Hwang et al ., ), but fumigants have been banned in some countries because of their potential negative impact on the environment (Donald & Porter, ). Tarping treated fields with specialized plastic sheets after application of the fumigant increases the efficacy of the treatment and reduces the potential for unintended exposure because the active ingredient is retained in the soil (McDonald et al ., ), but effective use of fumigants requires specialized training and equipment that are not always available to farmers in Latin America (Lathrop & Bushur‐Hallam, ).…”

Section: Clubroot Management In Latin Americamentioning

confidence: 99%

Clubroot disease in Latin America: distribution and management strategies

et al. 2019

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Clubroot caused by Plasmodiophora brassicae is an important disease of cruciferous crops worldwide. In Latin America (from Mexico to Chile, including the Caribbean), most of the area in cruciferous crops is devoted to oilseed rape (Brassica napus; c. 230 600 ha) in Brazil, Chile, Paraguay, Uruguay and Argentina, while cruciferous vegetables such as cabbage, cauliflower, broccoli and Brussels sprouts (40 900 ha) are cropped intensively on small acreages across the region. Although clubroot is present in most Latin American countries, there have been very few studies of P. brassicae. Clubroot research in Latin America has focused mainly on adapting disease management strategies developed in temperate climates to tropical climates, including liming, biological control and genetic resistance. This review summarizes the management strategies used in Latin America to reduce the impact of clubroot, including novel strategies when compared with temperate regions, such as a crop rotation with aromatic plant species and the use of biological control with Trichoderma spp. Latin America has unique characteristics relative to temperate countries such as high humidity, warm temperatures and acidic soil that impact the interaction between P. brassicae and its plant hosts, so more research is required.

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Section: Clubroot Management In Latin Americamentioning

confidence: 99%

Clubroot disease in Latin America: distribution and management strategies

et al. 2019

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“…Physical methods have achieved some success. Research indicates that covering the soil with totally impermeable films for two weeks can reduce clubroot severity from 82% in the untreated check to 35% [15]. Agricultural methods comprise soil alkalinity improvement, crop rotation, and the development of resistant varieties.…”

Section: Introductionmentioning

confidence: 99%

Integrated Management of Clubroot in Zhejiang Province, China

Zhang,

Yu,

Zhao

et al. 2024

Agronomy

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Clubroot, caused by Plasmodiophora brassicae, is a destructive soil-borne disease significantly harming global Brassica crop production. This study employed the Williams and European Clubroot Differential (ECD) and Williams systems to identify the pathotypes of P. brassicae collected from Hangzhou City, Yuhang District and Quzhou City, Kaihua County in Zhejiang Province. Greenhouse and field trials were conducted to evaluate the effects of plastic film covering and four chemical agents on the growth parameters and clubroot severity of the Chinese cabbage cultivar ‘Granaat’. Potential treatment mechanisms on clubroot were explored through a qPCR analysis of the resting spore density and pH measurement of the soil. Furthermore, treatment with 1-napthaleneacetic acid (NAA), a synthetic auxin, was also evaluated for its potential role in suppressing clubroot. The results indicate that the pathotypes of P. brassicae in the two districts were P1, ECD20/31/12, and P3, ECD20/15/4. While an individual application of plastic film covering could not effectively control clubroot, calcium cyanamid, dazomet and ammonium bicarbonate demonstrated significant efficacy in its management. These three agents significantly reduced the resting spore density in the soil, with calcium cyanamid and ammonium bicarbonate also increasing soil alkalinity. Additionally, ammonium bicarbonate promotes lateral root development in ‘Granaat,’ helping infected plants access adequate water and nutrients. However, NAA exhibited no efficacy in clubroot control. Therefore, sustained lateral root development is crucial for effectively resisting P. brassicae invasion. Considering application costs and environmental friendliness, we propose the field application of ammonium bicarbonate as the optimal method for clubroot disease management in Zhejiang Province.

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