Effect of management of organic wastes on inactivation of Brassica nigra and Fusarium oxysporum f.sp. lactucae using soil biosolarization

TY - JOUR

T1 - Effect of management of organic wastes on inactivation of Brassica nigra and Fusarium oxysporum f.sp. lactucae using soil biosolarization

AU - Fernández-Bayo, Jesus Dionisio

AU - Randall, Tara E.

AU - Harrold, Duff R.

AU - Achmon, Yigal

AU - Hestmark, Kelley V.

AU - Su, Joey

AU - Dahlquist-Willard, Ruth M.

AU - Gordon, Thomas R.

AU - Stapleton, James J.

AU - VanderGheynst, Jean S.

AU - Simmons, Christopher W.

N1 - Publisher Copyright: © 2018 Society of Chemical Industry

PY - 2018/8

Y1 - 2018/8

N2 - BACKGROUND: Soil biosolarization is a promising alternative to conventional fumigation. Volatile fatty acids (VFAs) produced in the soil through fermentation of amended organic matter can affect pest inactivation during biosolarization. The objective was to determine how soil amended with organic wastes that were partially stabilized through either composting or anaerobic digestion affected the inactivation of Brassica nigra (BN; a weed) and Fusarium oxysporum f. sp. lactucae (FOL; a phytopathogenic fungus). RESULTS: The mortality of BN seeds in the biosolarized soil was 12% higher than in the solarized soil, although this difference was not significant. However, a significant correlation between BN mortality and VFA accumulation was observed. The number of FOL colony-forming units (CFU) in solarized samples at 5 cm was 34 CFU g–1 of soil, whereas in the biosolarized samples levels were below the limit of quantification. At 15 cm, these levels were 100 CFU g–1 for solarized samples and < 50 CFU g–1 of soil for the biosolarized samples. Amendment addition positively affected the organic matter and potassium content after the solarization process. CONCLUSION: The organic waste stabilization method can impact downstream biosolarization performance and final pest inactivation levels. This study suggests that organic waste management practices can be leveraged to improve pest control and soil quality.

AB - BACKGROUND: Soil biosolarization is a promising alternative to conventional fumigation. Volatile fatty acids (VFAs) produced in the soil through fermentation of amended organic matter can affect pest inactivation during biosolarization. The objective was to determine how soil amended with organic wastes that were partially stabilized through either composting or anaerobic digestion affected the inactivation of Brassica nigra (BN; a weed) and Fusarium oxysporum f. sp. lactucae (FOL; a phytopathogenic fungus). RESULTS: The mortality of BN seeds in the biosolarized soil was 12% higher than in the solarized soil, although this difference was not significant. However, a significant correlation between BN mortality and VFA accumulation was observed. The number of FOL colony-forming units (CFU) in solarized samples at 5 cm was 34 CFU g–1 of soil, whereas in the biosolarized samples levels were below the limit of quantification. At 15 cm, these levels were 100 CFU g–1 for solarized samples and < 50 CFU g–1 of soil for the biosolarized samples. Amendment addition positively affected the organic matter and potassium content after the solarization process. CONCLUSION: The organic waste stabilization method can impact downstream biosolarization performance and final pest inactivation levels. This study suggests that organic waste management practices can be leveraged to improve pest control and soil quality.

KW - compost

KW - digestates

KW - pest control

KW - soil quality

KW - solarization

KW - volatile fatty acids

UR - http://www.scopus.com/inward/record.url?scp=85049808379&partnerID=8YFLogxK

U2 - 10.1002/ps.4891

DO - 10.1002/ps.4891

M3 - 文章

C2 - 29446871

AN - SCOPUS:85049808379

SN - 1526-498X

VL - 74

SP - 1892

EP - 1902

JO - Pest Management Science

JF - Pest Management Science

IS - 8

ER -