Combined effects of solarization and organic amendment on charcoal rot caused byMacrophomina phaseolina in the sahel

Ndiaye, Mbaye; Termorshuizen, Aad J.; Bruggen, A.H.C. van

doi:10.1007/bf02980703

Cited by 28 publications

(13 citation statements)

References 29 publications

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“…This long term effect is probably due to both the reduction of the inoculum density and some induced level of disease suppressiveness of the soil. The efficiency of the process can be improved by combining soil solarization and organic amendments, leading to an accumulation of ammonium/ammonia in the soil which reduces the inoculum densities and may weaken the remaining inoculum, including nematodes (Ndiaye et al 2007;Oka et al 2007). Obviously, solarisation is effective in warm and sunny areas in the world and, in Europe, adopted in the Mediterranean area (Katan 1996).…”

Section: Solarisationmentioning

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: Solarisationmentioning

confidence: 99%

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

et al. 2008

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“…Type MM2) for 4 min at 600 rotations min -1 and sieved through 180 and 45 µm screens. 50 mg from each sample were mixed with 100 ml of PDA amended with 5 mg chloramphenicol and 225 mg PCNB, and plated as described by Ndiaye et al (2007). From each sample, 1-3 colonies were transferred separately after 5-7 days incubation at 33°C in a fresh PDA medium.…”

Section: Collection Of Macrophomina Spp Isolatesmentioning

confidence: 99%

Is the recently described Macrophomina pseudophaseolina pathogenically different from Macrophomina phaseolina?

Ndiaye¹,

Sarr²,

Cissé³

et al. 2015

Afr. J. Microbiol. Res.

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Charcoal rot disease causes heavy yield losses to many hosts including cowpea (Vigna unguiculata) and groundnut (Arachis hypogea) in Senegal. The causal agent of the disease was a longtime considered to be Macrophomina phaseolina. However, a new Macrophomina species, Macrophomina pseudophaseolina was reported recently to also cause charcoal rot disease alone or in association with M. phaseolina on several hosts in Senegal. Since 1969, charcoal rot has become increasingly important in cowpea and other crops in the Sahel. It was not known if this status is correlated with the occurrence of the new Macrophomina species. This study therefore aimed to investigate the pathogenicity of M. phaseolina and M. pseudophaseolina on three varieties of cowpea under two temperature regimes. Ten M. pseudophaseolina and nine M. phaseolina isolates were tested on three cowpea varieties in a complete randomized design. Plants were grown in infected soil at two growth temperatures (24/34 and 26/36°C) in a climatic chamber. Disease incidence, level of tissue infection and potential primary inoculum produced in cowpea plants were determined 45 days after planting. By and large, the two Macrophomina species showed the same results, except that at 36°C, M. pseudophaseolina induced more disease development than M. phaseolina in the susceptible cv. Mouride. In conclusion, M. pseudophaseolina induces less disease incidence on cowpea at 34°C than at 36°C. At this temperature, it becomes as damageable as M. phaseolina on cowpea.

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“…ciceri (Arora et al, 1996) and others. Solarization and organic amendments had a stronger effect on disease severity by M. phaseolina than on inoculum density, possibly indicating a weakening effect (Ndiaye et al, 2007). Flow-cytometric, physiological and micoscopic studies on the viability of sublethally heated conidia of Fusarium showed that, although apparently not affected when examined shortly after heating, their population was nevertheless reduced later, suggesting delayed mortality (Assaraf et al, 2002).…”

Section: Mechanisms Of Pathogen and Disease Control 1041mentioning

confidence: 99%

“…It is diffi cult to control M. phaseolina by solarization since the pathogen is thermotolerant. The use of organic amendments followed by solarization resulted in better control of charcoal rot and a higher yield increase in cowpeas in the Sahel desert (Ndiaye et al, 2007). On the other hand, solarization may increase the phytotoxicity of herbicides by suppressing their degradation in the soil (Avidov et al, 1985).…”

Section: Combining Solarization With Organic Amendments 1052 (Biofumentioning

confidence: 99%

Control of Plant Disease through Soil Solarization

Gamliel

Katan

2009

Disease Control in Crops

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Combined effects of solarization and organic amendment on charcoal rot caused byMacrophomina phaseolina in the sahel

Cited by 28 publications

References 29 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

Is the recently described Macrophomina pseudophaseolina pathogenically different from Macrophomina phaseolina?

Control of Plant Disease through Soil Solarization

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