Integrated management of root-knot nematodes in a tomato-maize crop system using the biocontrol fungus Pochonia clamydosporia

Luambano, Nessie D.; Narla, R. D.; Wanjohi, Waceke J.; Kimenju, J. W.; Kerry, B. R.

doi:10.1016/j.cropro.2015.01.013

Cited by 20 publications

(16 citation statements)

References 19 publications

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“…However, high nitrogen/carbon levels can repress infection‐related genes in some fungi and may compromise parasitic ability . One study in Kenya to determine the efficacy of P. chlamydosporia and P. lilacinum in combination with organic amendments or crop rotation to control Meloidogyne in tomato resulted in increased tomato yield (by up to 64–65%) …”

Section: Management Strategies and Control Measuresmentioning

confidence: 99%

“…123 One study in Kenya to determine the efficacy of P. chlamydosporia and P. lilacinum in combination with organic amendments or crop rotation to control Meloidogyne in tomato resulted in increased tomato yield (by up to 64-65%). 124,125 Purpureocillium lilacinum strain 251 (PL Plus ® ), organic substrates and one botanical pesticide (azadirachtin 0.15%) used in an experiment to assess PPN control in carnations (Dianthus caryophyllus) showed that all treatments reduced PPN; a significant reduction also occurred in RKN egg mass production and root galling with the fungus treatment. 17…”

Section: Biological Control and Soil Amendmentsmentioning

confidence: 99%

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Agricultural nematology in East and Southern Africa: problems, management strategies and stakeholder linkages

Talwana

Sibanda²,

Wanjohi

et al. 2015

Pest. Manag. Sci.

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By 2050, Africa's population is projected to exceed 2 billion. Africa will have to increase food production more than 50% in the coming 50 years to meet the nutritional requirements of its growing population. Nowhere is the need to increase agricultural productivity more pertinent than in much of Sub-Saharan Africa, where it is currently static or declining. Optimal pest management will be essential, because intensification of any system creates heightened selection pressures for pests. Plant-parasitic nematodes and their damage potential are intertwined with intensified systems and can be an indicator of unsustainable practices. As soil pests, nematodes are commonly overlooked or misdiagnosed, particularly where appropriate expertise and knowledge transfer systems are meager or inadequately funded. Nematode damage to roots results in less efficient root systems that are less able to access nutrients and water, which can produce symptoms typical of water or nutrient deficiency, leading to misdiagnosis of the underlying cause. Damage in subsistence agriculture is exacerbated by growing crops on degraded soils and in areas of low water retention where strong root growth is vital. This review focuses on the current knowledge of economically important nematode pests affecting key crops, nematode control methods and the research and development needs for sustainable management, stakeholder involvement and capacity building in the context of crop security in East and Southern Africa, especially Kenya, Tanzania, Uganda and Zimbabwe.

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Section: Management Strategies and Control Measuresmentioning

confidence: 99%

Section: Biological Control and Soil Amendmentsmentioning

confidence: 99%

Agricultural nematology in East and Southern Africa: problems, management strategies and stakeholder linkages

Talwana

Sibanda²,

Wanjohi

et al. 2015

Pest. Manag. Sci.

View full text Add to dashboard Cite

show abstract

“…on soil conditions [61,62]. Apart from inducing differential gene expression and re-programming of the transcriptome profile in tomato roots, the fungus has been observed to up-regulate secondary metabolism, stress and defense response with high expression levels [63].…”

Section: Discussionmentioning

confidence: 99%

Survival of Root-Knot nematodes and their egg-parasitic fungus Pochonia chlamydosporia (Goddard) on weed roots

Bouchagier¹

2018

SDRP-JPS

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Background: Root-knot nematodes is a major pest and difficult to control in vegetable crops worldwide. Pochonia chlamydosporia is an egg-parasitic fungus which attracts attention as a control agent of root-knot nematodes. Weeds serve as potential hosts for both root-knot nematodes and P. chlamydosporia. The objectives of this study was to assess several weed species as hosts of root-knot nematodes and P. chlamydosporia and assess the impact of fungicide foliar treatments on P. chlamydosporia colonies in roots. Methodology: Pot experiments were conducted to study research objectives. Tomato, black nightshade, common lambsquarter and common wild oat were assessed as hosts for root-knot nematodes and P. chlamydosporia. Also, thiophanate-methyl (systemic fungicide) and mancozeb (non-systemic fungicide) were foliarly sprayed to tomato plants already colonized with root-knot nematodes and P. chlamydosporia. Results: Root-knot nematodes and P. chlamydosporia successfully colonized roots of species tested. No significant differences were observed between treatments. P. chlamydosporia colonized successfully tomato roots although applied in low concentration of 1670 spores/ml. Colonization of roots by the fungus was observed as early as seven days after inoculation. No negative impact on P. chlamydosporia colonies in tomato roots sprayed with a fungicide, were observed. Conclusions: Root-knot nematodes can survive in roots of a wide range of plant species, either crops or weeds. This is very important particularly in fallow periods. P. chlamydosporia can be integrated in nematode control schemes and in combination with foliar fungicides in presence of wilt diseases in roots.

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“…To improve soil microbial diversity by rotation, it may require the use of specific crop combinations, which are expected to have a greater impact on soil microbial diversity [ 12 ]. The cultivation of maize ( Zea mays L.) in rotation with tomato reduced the populations of nematodes [ 13 ], while the cultivation of banana ( Musa spp.) in rotation with pineapple ( Ananas comosus ) reduced the amount of FW pathogens in the soil fungal community [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Rotations improve the diversity of rhizosphere soil bacterial communities, enzyme activities and tomato yield

Cao

Qian

et al. 2023

PLoS ONE

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The use of rotations is an effective strategy to control crop diseases and improve plant health. The soil bacterial communities in the rhizosphere are highly important for maintaining soil productivity. However, the composition and structure of soil bacterial communities in the rotations of vegetable crops remain unclear. In this study, we explored the bacterial diversity and community structure of the tomato rhizosphere, including enzyme activities, yield, and fruit quality, under three different cropping systems: tomato-tomato (Solanum lycopersicum) continuous cropping (TY1), eggplant (Solanum melongena)-tomato rotation (TY2) and arrowhead (Sagittaria trifolia)-tomato rotation (TY3). The composition and diversity of the rhizosphere bacterial communities differed significantly. The diversity was more in the TY2 and TY3 treatments than those in the TY1 treatment. Chujaibacter and Rhodanobacter were two predominant and unique strains detected only in TY1, while the relative abundances of Curvibacter and Luteimonas were the highest in TY2 and TY3, respectively. Moreover, Lysobacter was a relatively abundant type of biocontrol bacterium found only in the TY3 treatment, which could contribute to alleviating the obstacle of tomato continuous cropping. Compared with the TY1 treatment, the activities of catalase were significantly higher in the TY2 and TY3 treatments. In addition, compared with TY1, the TY2 and TY3 plots increased the following parameters: tomato yields by 24–46%, total soluble solids by 37-93%, total organic acid by 10-15.7% and soluble protein by 10-21%, while the content of nitrate was significantly reduced by 23%. Altogether, compared with the tomato monoculture, the rotations of tomato with eggplant and arrowhead shifted the rhizosphere bacterial communities and improved the yield and quality of the tomato. Moreover, a tomato rotation, particularly with arrowhead, was an effective way to alleviate the obstacles of continuous cropping.

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Integrated management of root-knot nematodes in a tomato-maize crop system using the biocontrol fungus Pochonia clamydosporia

Cited by 20 publications

References 19 publications

Agricultural nematology in East and Southern Africa: problems, management strategies and stakeholder linkages

Agricultural nematology in East and Southern Africa: problems, management strategies and stakeholder linkages

Survival of Root-Knot nematodes and their egg-parasitic fungus Pochonia chlamydosporia (Goddard) on weed roots

Rotations improve the diversity of rhizosphere soil bacterial communities, enzyme activities and tomato yield

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