Biological control of Pythium damping-off and root-rot diseases of tomato using Trichoderma isolates employed alone or in combination

Elshahawy, Ibrahim E.; El-Mohamedy, R. S. R.

doi:10.1007/s42161-019-00248-z

Cited by 46 publications

(24 citation statements)

References 42 publications

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“…However, application of fungicides must be conducted in a proper manner to avoid development of fungicide resistance by the pathogens (Sanders et al, 1990; Titone et al, 2009; White et al, 2019). Alternatively, biocontrol has also proven to be an effective control strategy (Elshahawy et al, 2019; Jayaraj et al, 2006; Li et al, 2011; Tambing and Höfte, 2001). Finally, it is noteworthy that none of these strategies is effective in managing the disease when only applied individually (Lamichhane et al, 2017; Pérez‐Sierra and Jung, 2013).…”

Section: Discussionmentioning

confidence: 99%

Damping‐off, root rot and wilting caused by Pythium myriotylum on Acacia crassicarpa in Sumatra, Indonesia

Oliveira¹,

Jung

Milenković

et al. 2021

Forest Pathology

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Acacia crassicarpa Benth. (Fabaceae) is a legume tree native to northern Queesland, Australia, southwestern Papua New Guinea and southeastern Irian Jaya, Indonesia (Harwood, 1992). It is a multipurpose species with various end-product uses, and the combination of rapid growth, ability to suppress weeds, and abundant Rhizobium nodulation have contributed to this tree being used successfully for soil improvement and land rehabilitation on a wide range of degraded sites (Doran et al., 1997). Additionally, A. crassicarpa brings characteristics of high pulp yield and high fibre quality, which makes this tree highly suited to use in large commercial plantations for pulpwood production in Southeast Asian countries (Griffin et al., 2011). In Indonesia, A. crassicarpa was first planted in the early 1980 s where it showed good performance on peatlands in Sumatra (Midgley & Turnbull, 2003). It has been estimated that over two-million hectares had been planted in this region by 2014 (Harwood & Nambiar, 2014). The intensification of forestry practices is associated, in most cases, with increasing stand homogeneity and consequent reduction of genetic

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Section: Discussionmentioning

confidence: 99%

Damping‐off, root rot and wilting caused by Pythium myriotylum on Acacia crassicarpa in Sumatra, Indonesia

Oliveira¹,

Jung

Milenković

et al. 2021

Forest Pathology

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“…Tomato damping-off disease and root rot are common tomato seedling diseases caused by Pythium aphanidermatum and Fusarium sp., which can lead to poor plant development and even death [ 27 , 28 , 29 ]. With the increase in crop multiple cropping index and continuous cropping, the pathogens in the soil continue to accumulate, the types of pests and diseases increase, and this harms the entire growth period of fruits and vegetables.…”

Section: Discussionmentioning

confidence: 99%

Study on the Preparation and Effect of Tomato Seedling Disease Biocontrol Compound Seed-Coating Agent

Zhang

Liang

et al. 2022

Life

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Tomato damping-off and root rot are the two most common diseases of tomatoes at the seedling stage. At present, biological compound seed-coating agents are gradually replacing chemical agents in preventing and controlling plant diseases and insect pests, regulating plant growth, and ensuring crop yields. In this study, five biocontrol bacteria (Bacillus amyloliquefaciens (Ba), Bacillus subtilis (Bs wy-1), Bacillus subtilis (WXCDD105), Pseudomonas fluorescens (WXCDD51), and Bacillus velezensis (WZ-37)), with broad antibacterial spectra were mixed with auxiliary factors (inactive components of seed-coating agent) after fermentation to compound a seed-coating agent. In this study, the formula for a compound seed-coating agent was selected through orthogonal experiment. Gaseous silica was used as a thickener, and gum arabic and sodium dodecylbenzene sulfonate were used as a film-forming agent and dispersant, respectively. The mass of fumed silica, gum arabic, sodium dodecylbenzene sulfonate, and pearlescent powder was 1.3 g, 1 g, 0.05 g, and 0.5 g respectively. Adding gibberellin can improve the ability of seed-coating agents to promote seed germination and plant growth. This showed high efficiency in preventing and controlling seedling diseases and promoting seedling growth. After 6 days of inoculation with Pythium aphanidermatum, which caused tomato damping-off disease, the seedling mortality rate was 26.7% lower than that of the sterile water control, and 20% lower than that of carbendazim. After 21 days of inoculation with Fusarium sp., which caused tomato root rot disease, the seedling mortality rate was 44.31% lower than that of the control, and 22.36% lower than that of carbendazim. The plant height, stem diameter, root length, fresh weight, and dry weight of tomato seeds treated with biological compound seed-coating agent were significantly higher than that of the control. We tested the shelf life of the biological compound seed-coating agent, and found that the effect of seed germination and radicle growth did not decrease. This research provides information on the production technology and application of biological seed-coating agents in tomato production.

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“…Furthermore, Green et al (2001) explained the efficient biological control using T. harzianum by its ability to compete with P. ultimum for substrates from the seed coat and wounded or infected root tissues. Recently, Elshahawy and El-Mohamedy (2019) reported that in the greenhouse experiment, the combined inoculation of five Trichoderma isolates suppressed damping-off induced by P. aphanidermatum and increased the survival of tomato plants by 74.5%. The mechanism of T. harzianum involved in the control of maize seedling disease caused by P. ultimum, investigated by proteome technique, revealed the capacity of T. harzianum strain T22 to not only promote seedling growth but also to induce the plant resistance through protein accumulation (Chen et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

Biocontrol of Pythium Damping-Off on Pepper (Capsicum Annuum) with Selected Fungal and Rhizobacterial Agents

Mannai

Jabnoun‐Khiareddine

Nasraoui

et al. 2020

Int. J. Phytopathol.

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Pythium ultimum is a common soilborne pathogen causing serious losses of pepper seedlings in nurseries and few weeks post-planting. Two pepper associated-P. ultimum isolates (P1 and P2) were shown pathogenic to pepper cv. Altar causing post-emergence damping-off with P2 isolate being the most aggressive. Fungal and bacterial antagonists have been evaluated in vitro and in vivo for their ability to suppress P. ultimum. In dual culture assay, Trichoderma harzianum, T. viride and Gliocladium virens inhibited pathogen radial growth by 18.54, 17.52 and 15.24%, respectively, relative to control, while none of the tested bacteria was shown able to significantly inhibit pathogen growth. However, drastic changes in pathogen hyphae expressed as strong lysis, the formation of mycelial cords and mycoparasitism have been observed. Pepper seeds treated with fungal antagonists’ conidial suspensions showed 60, 50 and 60% less pre-emergence damping-off infections, respectively, compared to the positive control. When tested as root dipping, only G. virens resulted in 40% reduced post-emergence damping-off. An improved seedlings fresh weight, by 79.31 and 76%, was respectively induced by G. virens-, and T. viride-based treatments while an increment of 27.58, 25.33 and 22.22 % was recorded following treatments with G. virens, T. viride and T. harzianum, relative to the positive control. The majority of tested bacterial isolates, applied as a seed treatment, had significantly improved the emergence percentage of inoculated seedlings as compared to control with Burkholderia glathei isolate 35 being the most efficient. When applied as root dipping, reduction of post-emergence damping-off ranged between 40 and 100% with Pseudomonas aureofaciens isolate 314 being the most effective agent. Seedlings treated with P. aureofaciens (314) and Bacillus pumilus (420) showed 35.38 and 28.51% higher heights, respectively. Plant weight was enhanced by 73.06, 61.18, 77.39, 61.8 and 67.93% over control following treatments with P. aureofaciens isolates 314 and 31, Bacillus pumilus 420, P. fluorescens and P. putida 227.

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Biological control of Pythium damping-off and root-rot diseases of tomato using Trichoderma isolates employed alone or in combination

Cited by 46 publications

References 42 publications

Damping‐off, root rot and wilting caused by Pythium myriotylum on Acacia crassicarpa in Sumatra, Indonesia

Damping‐off, root rot and wilting caused by Pythium myriotylum on Acacia crassicarpa in Sumatra, Indonesia

Study on the Preparation and Effect of Tomato Seedling Disease Biocontrol Compound Seed-Coating Agent

Biocontrol of Pythium Damping-Off on Pepper (Capsicum Annuum) with Selected Fungal and Rhizobacterial Agents

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