Effects of Long Term Storage and Above Normal Temperatures On Spore Adhesion of Pasteuria Penetrans and Infection of the Root-Knot Nematode Meloidogyne Javanica

Giannakou, Ioannis O.; Pembroke, Barbara; Gowen, S. R.; Davies, Keith

doi:10.1163/004825997x00051

Cited by 28 publications

(20 citation statements)

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“…At temperatures below 20°C, P. penetrans may take >100 days to complete its life cycle (Stirling 1981). Slow release of spores from the cadavers of the root-knot nematode females during the second and third crops may have accounted for less spores accumulating in the system Giannakou et al 1997). The spore density would have been less in the second and third crops because of the replacement of half the soil with fresh soil before replanting.…”

Section: Pp=p Penetransmentioning

confidence: 99%

The potential of combining Pasteuria penetrans and neem (Azadirachta indica) formulations as a management system for root-knot nematodes on tomato

et al. 2007

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Initial applications of 10 4 spores g −1 of Pasteuria penetrans, and dried neem cake and leaves at 3 and 2% w:w, respectively, were applied to soil in pots. Juveniles of Meloidogyne javanica were added immediately to the pots (500, 5,000 or 10,000) before planting 6-week-old tomato seedlings. The tomatoes were sampled after 64 days; subsequently a second crop was grown for 59 days and a third crop for 67 days without further applications of P. penetrans and neem. There was significantly less root-galling in the P. penetrans combined with neem cake treatment at the end of the third crop and this treatment also had the greatest effect on the growth of the tomato plants. At the end of the third crop, 30% of the females were infected with P. penetrans in those treatments where spores had been applied at the start of the experiment. The effects of neem leaves and neem cake on the nematode population did not persist through the crop sequences but the potential for combining the amendments with a biological control agent such as P. penetrans is worthy of further evaluation.

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Section: Pp=p Penetransmentioning

confidence: 99%

The potential of combining Pasteuria penetrans and neem (Azadirachta indica) formulations as a management system for root-knot nematodes on tomato

et al. 2007

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“…For example, the surface of infective juveniles of Meloidogyne incognita apparently contain carbohydrate recognition domains, and these interact within N-acetylglucosamine moieties on the bacterial spore surface (47). Storage of this bacterium for 11 years resulted in decreased levels of infection, but did not affect its ability to attach to juveniles of M. javanica (67). Pasteuria penetrans also is moderately heat tolerant; preheating spores to 60 • C enhances attachment but depresses infection (67).…”

Section: Emerging Soil-biology Information As Related To Nematode Manmentioning

confidence: 99%

Developing Sustainable Systems for Nematode Management

Barker

Koenning

1998

Annu. Rev. Phytopathol.

176

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Early researchers identified key concepts and developed tactics for multiple-option management of nematodes. Although the emphasis on integrated pest management over the past three decades has promoted strategies and tactics for nematode management, comprehensive studies on the related soil biology-ecology are relatively recent. Traditional management tactics include host resistance (where available), cultural tactics such as rotation with nonhosts, sanitation and avoidance, and destruction of residual crop roots, and the judicious use of nematicides. There have been advances in biological control of nematodes, but field-scale exploitation of this tactic remains to be realized. New technologies and resources are currently becoming central to the development of sustainable systems for nematode-pest-crop management: molecular diagnostics for nematode identification, genetic engineering for host resistance, and the elucidation and application of soil biology for general integrated cropping systems. The latter strategy includes the use of nematode-pest antagonistic cover crops, animal wastes, and limited tillage practices that favor growth-promoting rhizobacteria, earthworms, predatory mites, and other beneficial organisms while suppressing parasitic nematodes and other plant pathogens. Certain rhizobacteria may induce systemic host resistance to nematodes and, in some instances, to foliage pathogens. The systems focusing on soil biology hold great promise for sustainable crop-nematode management, but only a few research programs are currently involved in this labor-intensive endeavor.

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“…Furthermore, Davies et al(1988) and Giannakou et al(1997) showed that temperature fluctuations in the glasshouse might retard the development of the parasite. The objective of this work was to determine the effect of different temperature schemes on the development of P. penetrans and number of endospores on a per nematode basis at constant temperatures known to be suitable for P. penetrans and in a fluctuating temperature regime such as might occur in a glasshouse production system.…”

Section: Introductionmentioning

confidence: 99%

Development of Pasteuria penetrans in Meloidogyne javanica females as affected by constantly high vs fluctuating temperature in an in-vivo system

Darban

Gowen

Pembroke

et al. 2005

J Zheijang Univ Sci B

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Darban et al. / J Zhejiang Univ SCI 2005 6B(Abstract: Growth room and glasshouse experiment was conducted to investigate the effect of constant and fluctuating temperatures on the development of Pasteuria penetrans a hyperparasite of root-knot nematodes. Tomato plants (Lycopersicon esculentum Mill) were inoculated with Meloidogyne javanica second-stage juveniles attached with endospores of P. penetrans and were grown in growth room at 26−29 °C and in glasshouse at 20−32 °C. The tomato plants were sampled from the growth room after 600 degree-days based on 17 °C/d, accumulating each day above a base temperature of 10 °C and from the glasshouse after 36 calendar days. Temperature affected the development of P. penetrans directly. The rate of development at constant temperature in growth room was faster than that in the glasshouse at fluctuating temperatures.

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Effects of Long Term Storage and Above Normal Temperatures On Spore Adhesion of Pasteuria Penetrans and Infection of the Root-Knot Nematode Meloidogyne Javanica

Cited by 28 publications

References 0 publications

The potential of combining Pasteuria penetrans and neem (Azadirachta indica) formulations as a management system for root-knot nematodes on tomato

The potential of combining Pasteuria penetrans and neem (Azadirachta indica) formulations as a management system for root-knot nematodes on tomato

Developing Sustainable Systems for Nematode Management

Development of Pasteuria penetrans in Meloidogyne javanica females as affected by constantly high vs fluctuating temperature in an in-vivo system

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