Effect of Soil Water Potential on Survival of Meloidogyne javanica in Fallow Soil

A natural infestation of Meloidogyne javanica in an aggregated Oxisol declined at an exponential rate when aliquots of the soil were stored for 72 days in polyethylene bags at various soil water potentials (Psi). Time periods required for reduction in soil infestations by 50% were 2.7, 4.9, 110, 10,...

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Veröffentlicht in:Journal of nematology. - 1969. - 15(1983), 1 vom: 16. Jan., Seite 110-5
1. Verfasser: Towson, A J (VerfasserIn)
Weitere Verfasser: Apt, W J
Format: Aufsatz
Sprache:English
Veröffentlicht: 1983
Zugriff auf das übergeordnete Werk:Journal of nematology
Schlagworte:Journal Article coiling nematode extraction quiescence
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520 |a A natural infestation of Meloidogyne javanica in an aggregated Oxisol declined at an exponential rate when aliquots of the soil were stored for 72 days in polyethylene bags at various soil water potentials (Psi). Time periods required for reduction in soil infestations by 50% were 2.7, 4.9, 110, 10, and 2.6 days at Psi of -0.16, -0.30, -1.1, -15, and -92 bars, respectively. In the wetter soils, at Psi of -0.16, -0.30, and -1.1 bars, the predominant stage recovered was the second-stage larva. In the drier soils, at Psi of -15 and -92 bars, both eggs and larvae were recovered with neither stage predominating. Incidence of coiled larvae was inversely related to the Psi value of the soil, a greater incidence occurring in the drier soils. After 15-32 days, percentages of coiled larvae were 13, 27, 55, 65, and 88% in soil at Psi of -0.17, -0.60, -1.9, -15, and -82 bars, respectively 
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