Effects of anaerobic soil disinfestation carbon sources on soilborne diseases and weeds of okra and eggplant in Nepal

Khadka, Ram Bahadur; Marasini, Madan; Rawal, Ranjana; Testen, Anna L.; Miller, Sally A.

doi:10.1016/j.cropro.2019.104846

Cited by 24 publications

(12 citation statements)

References 32 publications

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“…The choice of carbon source plays a critical role in the efficacy of ASD. For instance, rice bran-amended ASD was comparatively less effective in suppressing root-knot severity in okra and eggplant than mustard cake-and molasses-amended ASD in Nepal (Khadka et al, 2019). The ASD carbon sources included in this study were selected based on their demonstrated efficacy in previous research (Butler et al, 2012;McCarty et al, 2014;Miller, 2018, 2019).…”

Section: Discussionmentioning

confidence: 99%

Synergy of Anaerobic Soil Disinfestation and Trichoderma spp. in Rhizoctonia Root Rot Suppression

Khadka

Miller

2021

Front. Sustain. Food Syst.

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Potential synergy between anaerobic soil disinfestation (ASD) and Trichoderma spp. in suppression of Rhizoctonia root rot in radish was evaluated. A split-plot design with three replications was used; main plots were Trichoderma harzianum T22, Trichoderma asperellum NT25 and a non-Trichoderma control. Subplots were ASD carbon sources wheat bran, molasses, chicken manure, and mustard greens and two non-amended controls: anaerobic (covered and flooded) and aerobic (not covered or flooded). Carbon sources and Rhizoctonia solani inoculant were mixed with soil, placed in pots, and flooded, followed by drenching Trichoderma spore suspensions and sealing the pots in zip-lock bags. After 3 weeks, bags were removed, soil was aired for 1 week and radish “SSR-RR-27” was seeded. Rhizoctonia root rot severity and incidence were lowest in radish plants grown in ASD-treated soil amended with wheat bran, molasses, or mustard greens across all Trichoderma treatments. Disease severity was lower in radish plants treated with NT25 than with T22 or the non-Trichoderma control across all ASD treatments, and in radish grown in ASD-treated soil amended with wheat bran plus NT25 compared to ASD-wheat bran or NT25 alone. Rhizoctonia solani populations were significantly reduced by ASD treatment regardless of carbon source, while Trichoderma populations were not affected by ASD treatment with the exception of ASD-mustard greens. The interactions of either Trichoderma isolate and ASD with most carbon sources were additive, while T22 with ASD-molasses and NT25 with ASD–wheat bran interactions were synergistic in reducing disease severity. One interaction, T22 with ASD-chicken manure was antagonistic. Enhancement of ASD efficacy in suppressing soilborne diseases such as Rhizoctonia root rot by additional soil amendment with Trichoderma spp. during the process appears to be dependent on both Trichoderma isolate and ASD carbon source.

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Section: Discussionmentioning

confidence: 99%

Synergy of Anaerobic Soil Disinfestation and Trichoderma spp. in Rhizoctonia Root Rot Suppression

Khadka

Miller

2021

Front. Sustain. Food Syst.

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“…The field study showed ASD used maltose as carbon source and combined with PE provided an alternative to methyl bromide soil fumigation for control Phytophthora capsica, Fusarium oxysporum f. sp. lycopersici, nematodes (Meloidogyne incognita) and weed biomass in bell-pepper-eggplant double crop production system [39,40]. Liu et al reported that glucose as a carbon source for ASD could significantly decreased F. oxysporum populations after 16 days soil treated by the laboratory experiments and the greatest decrease in F. oxysporum populations was found on the 4th day in the glucose treatment [41].…”

Section: Effect Of Asd On Soil Fungal Pathogenic Microorganismsmentioning

confidence: 99%

Maltose and Totally Impermeable Film Enhanced Suppression of Anaerobic Soil Disinfestation on Soilborne Pathogens and Increased Strawberry Yield

et al. 2020

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Anaerobic soil disinfestation (ASD) is widely used to control soilborne diseases in organic crop production. The effect of ASD used different sealed films on soilborne pathogens and strawberry growth was evaluated in two laboratory studies and two field trials. Under maltose as carbon sources, 28 °C temperature and 30% of soil moisture optimal conditions ASD decreased Fusarium spp. and Phytophthora spp. by 100%. ASD used maltose as an organic amendment and sealed with totally impermeable film (TIF) obtained the highest suppression (>96%) against Fusarium spp. and Phytophthora spp. (>91%). According to the laboratory results, the efficacy of ASD utilizing 6 or 9 t/ha maltose and sealing with TIF was evaluated and compared with reference treatment with chloropicrin (Pic) or solarization (Sol) in the field trials. Compared with the untreated soil, ASD treatments greatly reduced the pathogenic population of Fusarium spp. and Phytophthora spp., and successfully controlled the damage of fusarium wilt with evidence of lower mortality (6%). ASD significantly increased soil nutrition promoted plant growth and increased strawberry yield, which was similar as the Pic, but better than Sol treatment. The analyzed fungal and bacterial microbiota did not show significant differences in the taxonomic richness and diversity between the compared treatments. Nevertheless, the abundance of some bacterial and fungal taxa tended to change between treated. The evidence showed that adding maltose and sealing TIF for ASD has the potential to replace Pic for pathogen control in commercial strawberry production.

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“…RKN disease is particularly serious under closed greenhouse conditions, which have a relatively suitable soil temperature for nematodes and an imbalanced soil ecology caused by intensive management, including a large cropping index, continuous monoculture, and overfertilization [ 10 , 11 ]. Various approaches can be used to control RKNs, including nematicides, solar heating, soil flooding, rotation, organic soil amendment, biocontrol agents, and resistant cultivars [ [11] , [12] , [13] , [14] , [15] , [16] , [17] , [18] ]. Among these methods, the use of organic additives is a traditional approach for controlling plant-parasitic nematodes [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Flooding soil with biogas slurry suppresses root-knot nematodes and alters soil nematode communities

Li,

Liu,

et al. 2024

Heliyon

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Effects of anaerobic soil disinfestation carbon sources on soilborne diseases and weeds of okra and eggplant in Nepal

Cited by 24 publications

References 32 publications

Synergy of Anaerobic Soil Disinfestation and Trichoderma spp. in Rhizoctonia Root Rot Suppression

Synergy of Anaerobic Soil Disinfestation and Trichoderma spp. in Rhizoctonia Root Rot Suppression

Maltose and Totally Impermeable Film Enhanced Suppression of Anaerobic Soil Disinfestation on Soilborne Pathogens and Increased Strawberry Yield

Flooding soil with biogas slurry suppresses root-knot nematodes and alters soil nematode communities

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