Impact of brassicaceous seed meals on the composition of the soil fungal community and the incidence of Fusarium wilt on chili pepper

Ma, Yan; Gentry, Terry J.; Hu, Ping; Pierson, Elizabeth A.; Gu, Mengmeng; Yin, Shixue

doi:10.1016/j.apsoil.2015.01.016

Cited by 29 publications

(37 citation statements)

References 28 publications

(28 reference statements)

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“…1a). Fungi of those genera are commonly identified as dominant in culture-dependent (Siles et al 2014;Lenc et al 2015) and culture-independent studies monitoring soil fungal diversity (Coats et al 2014;Ma et al 2015). In addition, Chaetomium and Acremonium species have been found to exhibit antagonistic effects against soil borne plant pathogens like F. oxysporum (Soytong et al 2001;El-Deeb and Arab 2013).…”

Section: Resultsmentioning

confidence: 98%

Assessment of the impact of the fumigant dimethyl disulfide on the dynamics of major fungal plant pathogens in greenhouse soils

et al. 2016

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Soil fumigants constitute a major tool for the control of soil borne fungal plant pathogens in protected crops. Dimethyl disulfide (DMDS) is a novel soil fumigant used either alone or in combination with other fumigants for the control of soil borne pests and diseases. In a commercial greenhouse for tomato production, we evaluated the impact of DMDS, comparatively to the alternative fumigant metam sodium, on the population of the dominant fungal plant pathogens in the study soil via q-PCR. Prior to soil fumigation, estimation of the fungal diversity in the studied soil via clone libraries identified Fusarium oxysporum and Rhizoctonia solani as the most abundant soil borne plant pathogens, while Cladosporium spp., known as opportunistic airborne tomato pathogens, were the most dominant fungi and based on this their dynamics upon fumigation was also studied. DMDS, at two dose rates, induced a drastic reduction in the population of F. oxysporum and R. solani, which lasted for the whole cultivation season. On the contrary, metam sodium exhibited an inhibitory effect on F. oxysporum that was alleviated at 120 d post fumigation. Both DMDS and metam sodium induced only a temporal reduction in the soil population of Cladosporium sp. which recovered by 60 days post fumigation. Our data suggest that DMDS even at the low dose rate (56.4 g m −2 ) could drastically reduce the population of the major soil borne tomato pathogens F. oxysporum and R. solani. Establishment of population thresholds as determined by q-PCR could represent a valuable tool for the estimation of the risk for disease severity and crop yield losses.

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Section: Resultsmentioning

confidence: 98%

Assessment of the impact of the fumigant dimethyl disulfide on the dynamics of major fungal plant pathogens in greenhouse soils

et al. 2016

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“…Similarlybrassica seed meals may be more effective in pathogens and weed control when used in combination (Mazzola and Brown, 2010).Another experiment reported the incidence of chickpea wilt by Fusarium oxysporumwas significantly reduced when combination of Brassica carinata seed meals of two different cultivars were used (Aberaet al, 2011). Yet another study by Ma et al (2015) revealed that a combination of Brassica juncea and Sinapisalba seed meals exhibited good disease control of Fusarium wilt in chili pepper. The results observed in our experiment might be different if seed meal mixtures were used rather than single seed meals alone.…”

Section: Development Of Alternatives For Management Ofseedling Healthmentioning

confidence: 99%

Influence of brassicaceous soil amendments on potentially beneficial and pathogenic soil microorganisms and seedling growth in Douglas-fir nurseries

Paudel

Carpenter‐Boggs

Higgins

2016

Applied Soil Ecology

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“…White mustard, on the other hand, typically reduces the abundance of soil fungi relative to controls [126], although in this experiment the community composition under mustard was similar to fallow, buckwheat, wheat, and all plants grown together. At the same time, this treatment was associated with a lower incidence of root necrosis, which suggests it reduced the overall abundance of fungi associated with disease [93,97].…”

Section: Effect Of Cover Crops On Community Compositionmentioning

confidence: 90%

“…Regarding pairwise interactions between treatments, alpha diversity was significantly higher under rockcress compared to bluebunch wheatgrass. Brassicaceous crops can inhibit fungal activity due to hydrolysis products of the glucosinolates they produce [115]; however, this is often limited to fungal pathogens [97], and is not widely observed in symbiotic fungi [116,117]. The fact that fungal diversity under rockcress was comparable to that of white yarrow and all plants combined suggests that rockcress did not inhibit fungi as much as other brassicaceous crops.…”

Section: Effect Of Cover Crop Diversity On Fungal Diversitymentioning

confidence: 98%

“…The breakdown and release of isothiocyanates from white mustard perhaps inhibited spore germination, reducing available inoculum during the grapevine growth stage. Antifungal compounds from brassicaceous crops can stay active for a period of 25-30 days [93,97] before they start to break down. Suppressive effects of white mustard may have been more pronounced had the plant been left to decompose in the soil [93,95,98].…”

Section: Effect Of Cover Crop Diversity On Abundance Of Ilyonectriamentioning

confidence: 99%

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Cover Crop Diversity as a Tool to Mitigate Vine Decline and Reduce Pathogens in Vineyard Soils

et al. 2020

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Wine grape production is an important economic asset in many nations; however, a significant proportion of vines succumb to grapevine trunk pathogens, reducing yields and causing economic losses. Cover crops, plants that are grown in addition to main crops in order to maintain and enhance soil composition, may also serve as a line of defense against these fungal pathogens by producing volatile root exudates and/or harboring suppressive microbes. We tested whether cover crop diversity reduced disease symptoms and pathogen abundance. In two greenhouse experiments, we inoculated soil with a 106 conidia suspension of Ilyonectria liriodendri, a pathogenic fungus, then conditioned soil with cover crops for several months to investigate changes in pathogen abundance and fungal communities. After removal of cover crops, Chardonnay cuttings were grown in the same soil to assess disease symptoms. When grown alone, white mustard was the only cover crop associated with reductions in necrotic root damage and abundance of Ilyonectria. The suppressive effects of white mustard largely disappeared when paired with other cover crops. In this study, plant identity was more important than diversity when controlling for fungal pathogens in vineyards. This research aligns with other literature describing the suppressive potential of white mustard in vineyards.

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Impact of brassicaceous seed meals on the composition of the soil fungal community and the incidence of Fusarium wilt on chili pepper

Cited by 29 publications

References 28 publications

Assessment of the impact of the fumigant dimethyl disulfide on the dynamics of major fungal plant pathogens in greenhouse soils

Assessment of the impact of the fumigant dimethyl disulfide on the dynamics of major fungal plant pathogens in greenhouse soils

Influence of brassicaceous soil amendments on potentially beneficial and pathogenic soil microorganisms and seedling growth in Douglas-fir nurseries

Cover Crop Diversity as a Tool to Mitigate Vine Decline and Reduce Pathogens in Vineyard Soils

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