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Anaerobic soil disinfestation reduces viability of and sclerotia and root-knot nematodes in muck soils.

07:00 EST 14th January 2020 | BioPortfolio

Summary of "Anaerobic soil disinfestation reduces viability of and sclerotia and root-knot nematodes in muck soils."

Experiments were conducted to evaluate potential functional and mechanistic differences in the suppression of and and root-knot nematodes in muck soils by anaerobic soil disinfestation (ASD) using different carbon source amendments. Volatile compounds produced during ASD in muck soil amended with molasses, wheat bran, or mustard greens at 20.2 Mg/ha or a 2% ethanol solution significantly reduced mycelial growth and number of sclerotia produced by both spp. compared to the anaerobic control. In amended soils, acetic and butyric acids were detected in concentrations that reduced the viability of sclerotia of both pathogens. Higher concentrations of CO2 were observed in ASD-treated soils, regardless of the amendment, than in the non-amended anaerobic control. Only amendment with wheat bran did not increase the production of methane gas during ASD compared to the controls. survival was completely suppressed in soils treated with ASD regardless of carbon source. Field trials were conducted in Ohio muck soil to assess survival of sclerotia of both spp. The viability of sclerotia of both spp. was significantly reduced in soil subjected to ASD amended with wheat bran (20.2 Mg/ha), molasses (10.1 Mg/ha), or wheat bran (20.2 Mg/ha) plus molasses (10.1 Mg/ha) compared to the controls. A consistent negative correlation between soil reduction and viability of sclerotia of both pathogens was observed. Wheat bran and molasses are both widely available amendments that can be used as ASD carbon sources for the management of soilborne pathogens in muck soils.

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This article was published in the following journal.

Name: Phytopathology
ISSN: 0031-949X
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