Disease complexes involving plant parasitic nematodes and soilborne pathogens

Back, Matthew A.; Haydock, P. P. J.; Jenkinson, P.

doi:10.1046/j.1365-3059.2002.00785.x

Cited by 254 publications

(169 citation statements)

References 82 publications

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“…However, yield losses from combinations of pathogens and disease complexes are not well understood. For example, fungal wilt pathogens and nematodes can have synergistic interactions (Back et al 2002).…”

Section: Economic Impacts Of Soilborne Pathogens and Root Diseasesmentioning

confidence: 99%

The rhizosphere: a playground and battlefield for soilborne pathogens and beneficial microorganisms

et al. 2008

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The rhizosphere is a hot spot of microbial interactions as exudates released by plant roots are a main food source for microorganisms and a driving force of their population density and activities. The rhizosphere harbors many organisms that have a neutral effect on the plant, but also attracts organisms that exert deleterious or beneficial effects on the plant. Microorganisms that adversely affect plant growth and health are the pathogenic fungi, oomycetes, bacteria and nematodes. Most of the soilborne pathogens are adapted to grow and survive in the bulk soil, but the rhizosphere is the playground and infection court where the pathogen establishes a parasitic relationship with the plant. The rhizosphere is also a battlefield where the complex rhizosphere community, both microflora and microfauna, interact with pathogens and influence the outcome of pathogen infection. A wide range of microorganisms are beneficial to the plant and include nitrogen-fixing bacteria, endo-and ectomycorrhizal fungi, and plant growth-promoting bacteria and fungi. This review focuses on the population dynamics and activity of soilborne pathogens and beneficial microorganisms. Specific attention is given to mechanisms involved in the tripartite interactions between beneficial microorganisms, pathogens and the plant. We also discuss how agricultural practices affect pathogen and antagonist populations and how these practices can be adopted to promote plant growth and health.

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Section: Economic Impacts Of Soilborne Pathogens and Root Diseasesmentioning

confidence: 99%

The rhizosphere: a playground and battlefield for soilborne pathogens and beneficial microorganisms

et al. 2008

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“…As complex mixtures, EOs may display several biological activities which makes them desirable biopesticides, being able to control not just the targeted pest but also opportunistic species and resistant strains. This is of particular interest in phytoparasitic nematode control since complex disease symptoms are also commonly associated with accompanying pathogenic microbiota (Back et al, 2002;Vicente et al, 2011). Several EOs, such as those of Cinnamomum zeylanicum (Kong et al, 2006); Boswellia carterii, Paeonia moutan, Perilla frutescens, Schizonepeta tenuifolia (Choi et al, 2007a); Thymus vulgaris (Kong et al, 2007); Litsea cubeba, Pimenta dioica, Trachyspermum ammi ; Coriandrum sativum and Liquidambar orientalis (Kim et al, 2008) have revealed strong activities against B. xylophilus.…”

Section: Introductionmentioning

confidence: 99%

Bioactivity against Bursaphelenchus xylophilus: Nematotoxics from essential oils, essential oils fractions and decoction waters

et al. 2013

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a b s t r a c tThe Portuguese pine forest has become dangerously threatened by pine wilt disease (PWD), caused by the pinewood nematode (PWN), Bursaphelenchus xylophilus. Synthetic chemicals are the most common pesticides used against phytoparasitic nematodes but its use has negative ecological impacts. Phytochemicals may prove to be environmentally friendly alternatives. Essential oils (EOs) and decoction waters, isolated from 84 plant samples, were tested against B. xylophilus, in direct contact assays. Some successful EOs were fractionated and the fractions containing hydrocarbons or oxygen-containing molecules tested separately. Twenty EOs showed corrected mortalities P96% at 2 lL/mL. These were further tested at lower concentrations. Ruta graveolens, Satureja montana and Thymbra capitata EOs showed lethal concentrations (LC 100 ) < 0.4 lL/mL. Oxygen-containing molecules fractions showing corrected mortality P96% did not always show LC 100 values similar to the corresponding EOs, suggesting additive and/or synergistic relationships among fractions. Nine decoction waters (remaining hydrodistillation waters) revealed 100% mortality at a minimum concentration of 12.5 lL/mL. R. graveolens, S. montana and T. capitata EOs are potential environmentally friendly alternatives for B. xylophilus control given their high nematotoxic properties. Nematotoxic activity of an EO should be taken in its entirety, as its different components may contribute, in distinct ways, to the overall EO activity.

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“…This disease complex, induced by the interaction between both pathogens, has increasingly become a serious problem in the Saudi green bean fields and greenhouses. Many reports have clearly shown that the damage caused by rootknot nematodes aid in the development of diseases caused by some soil-borne fungi (Al-Hazmi, 1985;Evans & Haydock, 1993;Back et al, 2002) Several environmental and edaphic factors can influence the interaction between these two pathogens. Subsequently, the development and severity of the resulted disease complex (rootknot/charcoal root rot) on green beans and other crops increased (Tu & Cheng, 1971;Siddiqui & Husain, 1991;Nischwitz et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Influence of soil texture and moisture on the interaction of Meloidogynejavanica and Macrophominaphaseolina on green beans

Al-Hazmi¹,

Dawabah²,

Al-Nadhary³

et al. 2017

JEBAS

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Root-knot/charcoal root rot disease complex caused by the interaction of Meloidogyne javanica and Macrophomina phaseolina is a serious disease complex attacking bean crop either in the field or greenhouses. In two different greenhouse tests, the influence of soil texture and moisture on the severity of the root-knot/charcoal root rot disease complex on green beans, Phaseolus vulgaris were examined. Results of the soil texture test indicated that the disease severity (suppression of plant growth and rootknot/charcoal root rot disease index), the nematode reproduction and the fungus growth in soil increased with the increase of sand content in the soil. Results of the soil moisture test showed that the greatest plant damage occurred at the soil of moisture level of 30% of field capacity, and disease severity decreased gradually as the moisture level was increased.

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Disease complexes involving plant parasitic nematodes and soilborne pathogens

Cited by 254 publications

References 82 publications

The rhizosphere: a playground and battlefield for soilborne pathogens and beneficial microorganisms

The rhizosphere: a playground and battlefield for soilborne pathogens and beneficial microorganisms

Bioactivity against Bursaphelenchus xylophilus: Nematotoxics from essential oils, essential oils fractions and decoction waters

Influence of soil texture and moisture on the interaction of Meloidogynejavanica and Macrophominaphaseolina on green beans

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