Effect of <i>Brassica</i> crop-based biofumigation on soilborne disease suppression in woody ornamentals

Baysal-Gurel, Fulya; Liyanapathiranage, Prabha; Addesso, Karla M.

doi:10.1080/07060661.2019.1625444

Cited by 15 publications

(18 citation statements)

References 32 publications

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“…The increase in pseudomonad counts in the cover crop used soil also aids in the hypothesis of cover crop increasing the disease suppressiveness of the soil. This is also supported by many researchers, as they have reported the increase in the pseudomonad population in the soil system with the use of cover crops [25,[53][54][55][56][57][58][59][60][61][62][63][64][65]. The pseudomonad population can rapidly colonize in the rhizosphere to produce varieties of growth promoting materials as well as metabolites promoting plant growth [66] and competes aggressively with the other microorganisms [67].…”

Section: Discussionmentioning

confidence: 69%

“…Populations of Rhizoctonia causing root rot of apple [55] and root rot disease incidence in sugerbeet caused by R. solani [56] were reduced with the brassica cover crops. Baysal-Gurel and her colleagues [57] reported a successful suppression of R. solani by 20-30% using biofumigant cover crop as green manure in a woody ornamental production system. Similarly, Dawadi and colleagues [25] reported a long-term usage of cover crop to increase the soil suppressiveness against R. solani.…”

Section: Discussionmentioning

confidence: 99%

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Impact of Winter Cover Crop Usage in Soilborne Disease Suppressiveness in Woody Ornamental Production System

et al. 2020

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Diseases caused by soilborne pathogens are a major limitation to field grown nursery production. The application of cover crops for soilborne disease management has not been widely investigated in a woody ornamental nursery production system. The objective of this study was to explore the impact of winter cover crops usage on soilborne disease management in that system. Soils from established field plots of red maple (Acer rubrum L.) with and without winter cover crops (crimson clover (Trifolium incarnatum L.) or triticale (× Triticosecale W.)) were sampled following the senescence of the cover crops. Separate bioassays were performed using red maple cuttings on inoculated (with Phytopythium vexans, Phytophthora nicotianae or Rhizoctonia solani) and non-inoculated field soils. The results indicated that winter cover crop usage was helpful for inducing soil disease suppressiveness. There was lower disease severity and pathogen recovery when the cover crops were used compare to the non-cover cropped soil. However, there were no differences in maple plant fresh weight and root weight between the treatments. The rhizosphere pseudomonad microbial population was also greater when the cover crops were used. Similarly, the C:N ratio of the soil was improved with the cover crop usage. Thus, in addition to improving soil structure and reducing erosion, cover crops can provide improved management of soilborne diseases. Therefore, stakeholders can consider cover crop usage as an alternative sustainable management tool against soilborne diseases in field nursery production system.

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Section: Discussionmentioning

confidence: 69%

Section: Discussionmentioning

confidence: 99%

Impact of Winter Cover Crop Usage in Soilborne Disease Suppressiveness in Woody Ornamental Production System

et al. 2020

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“…The use of isothiocyanates (ITCs) producing Brassicaceae cover crops for soil biofumigation has acquired increasing interest as an alternative to restricted chemical fumigants such as methyl bromide for soil-borne disease control [ 94 ]. Although isolates of Pythium spp.…”

Section: Control Measuresmentioning

confidence: 99%

Pythium Damping-Off and Root Rot of Capsicum annuum L.: Impacts, Diagnosis, and Management

Arora

Sharma

et al. 2021

Microorganisms

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Capsicum annuum L. is a significant horticulture crop known for its pungent varieties and used as a spice. The pungent character in the plant, known as capsaicinoid, has been discovered to have various health benefits. However, its production has been affected due to various exogenous stresses, including diseases caused by a soil-borne pathogen, Pythium spp. predominantly affecting the Capsicum plant in younger stages and causing damping-off, this pathogen can incite root rot in later plant growth stages. Due to the involvement of multiple Pythium spp. and their capability to disperse through various routes, their detection and diagnosis have become crucial. However, the quest for a point-of-care technology is still far from over. The use of an integrated approach with cultural and biological techniques for the management of Pythium spp. can be the best and most sustainable alternative to the traditionally used and hazardous chemical approach. The lack of race-specific resistance genes against Pythium spp. can be compensated with the candidate quantitative trait loci (QTL) genes in C. annuum L. This review will focus on the epidemiological factors playing a major role in disease spread, the currently available diagnostics in species identification, and the management strategies with a special emphasis on Pythium spp. causing damping-off and root rot in different cultivars of C. annuum L.

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“…Pathogen population of Rhizoctonia was reduced by using cover crops in apple [40] and beet [41] production systems. Similarly, Baysal-Gurel et al [42] reported 12-30% of disease suppression when the biofumigant cover crops were used in woody ornamental production systems. Furthermore, P. vexans was more severe on those cover crops compared to the other two.…”

Section: Discussionmentioning

confidence: 95%

Response of Cover Crops to Phytopythium vexans, Phytophthora nicotianae, and Rhizoctonia solani, Major Soilborne Pathogens of Woody Ornamentals

2021

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Management of plant diseases is a subject of concern for researchers as well as growers. Different management practices are being developed and used to combat the rising number of plant pathogens, which threaten nursery crop production. Use of cover crops for sustainable management of soilborne diseases is being explored as an alternative strategy to the chemicals. However, the potential threat of these cover crops acting as a secondary host of these devastating soilborne pathogens has not been described. We studied the response of the major cover crops being used by woody ornamental growers in the Southeastern United States to Phytopythium vexans, Phytophthora nicotianae, and Rhizoctonia solani in greenhouse conditions to identify the effective cover crops that can be used in a nursery field production system. Data related to post-emergence damping-off and plant growth parameters (plant height increase and fresh weight) were recorded. Similarly, cover crop roots were assessed for root rot disease severity using a scale of 0–100% roots affected. Among the tested cover crops, the grass cover crops triticale (×Triticosecale Wittm. ex A. Camus.), annual ryegrass (Lolium multiflorum L.), Japanese millet (Echinochloa esculenta (A. Braun) H. Scholz), and the legumes Austrian winter pea (Pisum sativum var. arvense (L.) Poir) and cowpea ‘Iron and Clay’ (Vigna unguiculata (L.) Walp.), showed lower root rot disease severity and post-emergence damping-off in the soil inoculated with P. nicotianae, R. solani, or P. vexans compared to the other crops. Since these cover crops can act as non-host crops and benefit the main crop in one way or another, they can be used in the production system. Further research is recommended to evaluate their performance in a natural field setting.

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Effect of Brassica crop-based biofumigation on soilborne disease suppression in woody ornamentals

Cited by 15 publications

References 32 publications

Impact of Winter Cover Crop Usage in Soilborne Disease Suppressiveness in Woody Ornamental Production System

Impact of Winter Cover Crop Usage in Soilborne Disease Suppressiveness in Woody Ornamental Production System

Pythium Damping-Off and Root Rot of Capsicum annuum L.: Impacts, Diagnosis, and Management

Response of Cover Crops to Phytopythium vexans, Phytophthora nicotianae, and Rhizoctonia solani, Major Soilborne Pathogens of Woody Ornamentals

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