Tropical soil microflora of spice-based cropping systems as potential antagonists of root-knot nematodes

Eapen, Santhosh J.; Beena, B.; Ramana, K. V.

doi:10.1016/j.jip.2005.01.011

Cited by 66 publications

(38 citation statements)

References 19 publications

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“…Transmission of the fungus into an uninfected ant nest is analogous to the ant nest satellite expansion function: the probability of transmission is a linear function of the number of infected nests in the Moore neighborhood, F (p t = t 0 + t 1 F for F > 0). In addition, there is a very small probability, a, that an uninfected site with no infected neighbors will become infected; this is necessary to prevent the fungus from becoming extinct, but is also biologically reasonable given that L. lecanii has been reported to persist in environmental reservoirs, e.g., in the soil (Eapen et al 2005, Meyling & Eilenberg 2006; infection of isolated sites, with F = 0, represents a low probability transmission from an environmental reservoir.…”

Section: Methodsmentioning

confidence: 99%

Spatial and Temporal Dynamics of a Fungal Pathogen Promote Pattern Formation in a Tropical Agroecosystem

Jackson¹,

Vandermeer²,

Perfecto³

2009

TOECOLJ

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Abstract:Recent studies have shown that the spatial pattern of nests of an arboreal ant, Azteca instabilis (Hymenoptera: Formicidae), in a tropical coffee agroecosystem may emerge through self-organization. The proposed self-organization process involves both local expansion and density-dependent mortality of the ant colonies. We explored a possible mechanism for the density-dependent mortality involving the entomopathogenic fungus Lecanicillium lecanii. L. lecanii attacks a scale insect, Coccus viridis (Coccidae, Hemiptera), which is tended by A. instabilis in a mutualistic association. By attacking C. viridis, L. lecanii may have an indirect, negative effect on ant colony survival. To explore this hypothesis, we conducted investigations into the spatial and temporal distributions of L. lecanii. We measured incidence and severity at 4 spatial scales: (1) throughout a 45 hectare study plot; (2) in two 40 X 50 meter plots; (3) on coffee bushes within 4 m of two ant nests; and (3) on individual branches in a single coffee bush. The plot-level censuses did not reveal a clear spatial pattern, but the finer scale surveys show distinct patterns in the spread of infection over time. We also developed a simple cellular automata model of the coupled ant nest-L. lecanii system which is able to produce spatial patterns qualitatively and quantitatively similar to that found in the field. The accumulated evidence suggests that L. lecanii may very well be responsible for the density-dependent control thought necessary for spatial pattern formation of ant nests in this system.

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Section: Methodsmentioning

confidence: 99%

Spatial and Temporal Dynamics of a Fungal Pathogen Promote Pattern Formation in a Tropical Agroecosystem

Jackson¹,

Vandermeer²,

Perfecto³

2009

TOECOLJ

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“…As mention by Alexopoulos and Mims (1979) that all species were belong to the common species of soil fungi. In addition, those species were also found by Eapen et al (2005) and Chavarriaga et al (2007). The other species e.g.…”

Section: Discussionmentioning

confidence: 86%

IDENTIFICATION OF SOIL FUNGI ISOLATED FROM ALFALFA (Medicago sativa L) TO FIND SPECIFIC FUNGI WHICH IMPROVED THE GROWTH OF ALFALFA

Yudiarti

Sumarsono

Widjayanto

2010

J. Indonesian Trop. Anim. Agric.

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Objective of the study was to identify all kinds of fungi which can life in the alfalfa plantation in Baturaden Purwokerto-Central Java. Fungi used in this study was 38 isolates. All fungi have been taken from the isolation of soil and root of diseased plant. Macroscopic and microscopic methods were used for identification. Potato Dextrose Agar (PDA) medium was used to grow the fungi. All fungi were identified using book identification of fungi. The results showed that from 38 isolates, six species was determined and one was unidentifed. Those species identified were Cuninghammela sp, Trichoderma sp, Vertilicium sp, Eupenicillium sp, Pythium sp, Aspergillus sp.

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“…Effective reduction in nematode population due to split applications in different intervals might be due to maximum building up of bacterial population/root colonization by bacterium inoculation. Eapen et al, (2005) and Devi & Dutta (2002) reported the potential antagonistic of Trichoderma sp. on Root-knot nematode eggs and inhibition in egg hatching.…”

Section: Field Experimentsmentioning

confidence: 99%

Sustainable Plant Disease Management of Wilt of Chickpea Caused by Fungi-Nematode Interaction

Simon¹,

Anamika²

2011

JAS

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Fungi and bacteria are being developed into biological pesticides in agriculture. Pseudomonas fluorescence and Trichoderma viride were tested against M. incognita and Fusarium oxysporum f. sp. ciceri in pots and in infested field. In the pots Trichoderma viride were applied in seed, soil and foliar. The results indicated a significantly remarkable reduction of M. incognita population in the treatment of Trichoderma viride (soil) followed by (seed) and (foliar) application. Further it was also observed the Trichoderma viride enhanced plant growth parameters of chickpea and reduced the incidence of Fusarium wilt disease of chickpea up to 70% in soil treatment followed by 66% seed treatment 49% foliar application form control.In the infested (fusarium wilt and M. incognita) field microplot Trichoderma viride and Pseudomonas fluorescence were applied @ 3kg /ha in soil and @ 3g/kg in seed. Results indicate that both bio-agents treatments significantly reduced the formation of root-knot population as compared to control. Application of both the bio-agents significantly enhanced plant growth parameters and no. of grain pods/ plant as compared with control. Both the bio-agents also reduced significantly incidence of Fusarium oxysporum f. sp ciceri as compared to control. In comparing the two bio-agents it was observed that wilt incidence was lowest in the treatments of Pseudomonas fluorescence (soil treatment) 15.1% followed by Pseudomonas fluorescence (seed treatment) 20.8%, Trichoderma viride (soil treatment) 26.2%, and Trichoderma viride (seed treatment) 31.6%.

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Tropical soil microflora of spice-based cropping systems as potential antagonists of root-knot nematodes

Cited by 66 publications

References 19 publications

Spatial and Temporal Dynamics of a Fungal Pathogen Promote Pattern Formation in a Tropical Agroecosystem

Spatial and Temporal Dynamics of a Fungal Pathogen Promote Pattern Formation in a Tropical Agroecosystem

IDENTIFICATION OF SOIL FUNGI ISOLATED FROM ALFALFA (Medicago sativa L) TO FIND SPECIFIC FUNGI WHICH IMPROVED THE GROWTH OF ALFALFA

Sustainable Plant Disease Management of Wilt of Chickpea Caused by Fungi-Nematode Interaction

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