Management of black rot of cabbage<i>(Xanthomonas campestris</i>pv.<i>campestris)</i>in Kenya

Onsando, J. M.

doi:10.1080/09670878709371102

Cited by 5 publications

(4 citation statements)

References 1 publication

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“…On the other hand, necrotrophs such as Xantomonas campestris pv. campestris not only survive but also build up their population in crop residues; the kale straw cover prevents splash dispersal so that the bacterial inoculum hardly reaches the leaf and therefore the infection does not occur (17). Furthermore, the dry winter in Lavras did not favor the bacterial disease, but overhead irrigation supplied the pathogen with the required moisture for dispersal and infection.…”

Section: Influence Of Management On the Severity Of Diseases In Lavra...mentioning

confidence: 99%

Urban production of kale (Brassica oleracea var. acephala) in Brazil: survey of diseases and factors that contribute to their outbreak

et al. 2022

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Kale (Brassica oleracea var. acephala) is mostly produced by urban growers in Brazil, but little is known about the diversity and the management of diseases for sustainable urban agriculture. The present study investigated the occurrence of diseases in the urban cultivation of kale in two regions of Brazil, representing the climate conditions Cwa (Lavras - MG) and Aw (Campina Grande - PB) according to Köppen Geiger classification, as well as the factors that contribute to such occurrence. Growers in each region were visited every week during eight months while a survey was carried out on the diseases and the major crop management practices. In both regions, powdery mildew (Erysiphe polygoni) and black rot (Xanthomonas campestris pv. campestris) were the prevalent diseases. Relative humidity and high temperature were the environmental factors that contributed to increase the diseases. Management using straw mulch favored powdery mildew reduction and black rot maintenance. Consequently, kale intensive production resulted in higher black rot severity. These results demonstrated the importance of proper recommendations on management practices for urban agriculture with the aim of controlling kale diseases according to the climate conditions in the region.

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Section: Influence Of Management On the Severity Of Diseases In Lavra...mentioning

confidence: 99%

Urban production of kale (Brassica oleracea var. acephala) in Brazil: survey of diseases and factors that contribute to their outbreak

et al. 2022

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“…The use of chemicals for black rot control has variable results. The pathogen is susceptible to some fungicides (Onsando 1987;Mochizuki & Alvarez 1996). These chemicals are most effective if plants are treated immediately prior to infection (Mochizuki & Alvarez 1996).…”

Section: Cultural Control Of Black Rotmentioning

confidence: 99%

“…In addition, conditions favouring pathogen growth reduce the efficacy of chemical control. An alternative strategy involving the use of grass mulch to reduce water splash was found to be as effective as chemical control (Onsando 1987).…”

Section: Cultural Control Of Black Rotmentioning

confidence: 99%

Opportunities for developing value-added brassica seed

Jong¹,

Braithwaite²,

Roush³

et al. 2010

NZGA R&P Series

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New Zealand produces approximately 5,500 tonnes of brassica seed per year, two thirds of which, valued at $13M, is exported. Black rot caused by Xanthomonas campestris pv. campestris is a common disease of brassicas, and while crop losses are not extensive in New Zealand, internationally total crop losses have been reported. Seeds are the primary source of inoculum and the ease with which this inoculum spreads means that even small traces can cause severe epidemics. Genetic resistance to black rot is a complex trait which makes breeding for resistance in brassicas challenging. The effectiveness of chemical and cultural practices is variable. Biological control with natural antagonistic microbes may provide a more effective means of controlling black rot and other pests and diseases, and create opportunities for increasing the export value of brassica seed. Current cultural practices and the potential for biological control for the management of black rot are reviewed. Keywords: biocontrol, Brassicaceae, crucifer

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“…Black rot is one of the most devastating and widespread diseases in Brassica crops, and an especially serious problem in leafy‐green vegetables in several countries around the world (Chakravarti et al. 1969, Alvarez and Cho 1978, Schaad and Thaveechai 1983, Bandyopadhyay and Chattopadhyay 1985, Onsando 1987, Vicente 2004, Massomo et al. 2005, Mirik et al.…”

mentioning

confidence: 99%

Screening for resistance to black rot in Brassica oleracea crops

et al. 2012

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Xanthomonas campestris pv. campestris (Xcc), causal agent of black rot, is widely distributed around the world in cabbage and kale crops causing severe yield losses. Nine races of the pathogen were described, being races 1 and 4 the most aggressive and widespread. The objective of this work was to identify new sources of resistance to races 1 and 4 of Xcc in different Brassica oleracea crops. Two hundred and twentyone landraces and 35 commercial and improved cultivars were evaluated. Most accessions were susceptible to both races, except cabbage cultivars ÔBalo´nÕ and ÔQuintal de AlsaciaÕ and kale landrace MBG-BRS0070, which showed some plants with different level of resistance to races 1 and 4, thus indicating that race-non-specific resistance can be involved. Kale landrace MBG-BRS0286 showed an intermediate mean disease score for race 1. These accessions can be crossed with cabbage cultivars and may provide new combinations of resistance genes with protection against black rot.

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Management of black rot of cabbage(Xanthomonas campestrispv.campestris)in Kenya

Cited by 5 publications

References 1 publication

Urban production of kale (Brassica oleracea var. acephala) in Brazil: survey of diseases and factors that contribute to their outbreak

Urban production of kale (Brassica oleracea var. acephala) in Brazil: survey of diseases and factors that contribute to their outbreak

Opportunities for developing value-added brassica seed

Screening for resistance to black rot in Brassica oleracea crops

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