<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Southern root-knot nematode (SRKN, <italic>Meloidogyne</italic> incognita) is a major pest of sweet potato, and nematicides are needed to manage this nematode. The objectives of this study were to assess the efficacy of fluazaindolizine, a new non-fumigant nematicide, in comparison with the fumigant nematicide 1,3-dichloropropene (1,3-D) and non-fumigant nematicides fluopyram and oxamyl for (1) SRKN management, (2) impacts on free-living nematodes, and (3) sweet potato yield in field trials. Among all nematicides, 1,3-D at 84 kg/ha most consistently (2 of 3 years) managed SRKN soil populations and improved yield. Fluazaindolizine at 2.24 kg/ha and fluazindolizine at 1.12 kg/ha plus oxamyl at 2.14 kg/ha managed SRKN populations and improved yield in 1 of 3 years, whereas fluazaindolizine alone at 1.12 kg/ha only decreased SRKN populations. Fluopyram at 238 g/ha did not affect SRKN or yield. Nematicide application also had non-target effects on free-living nematodes with 1,3-D reducing abundances relative to untreated most frequently (2018 and 2020), but other nematicides also reducing free-living nematode abundances in 2020. In summary, 1,3-D is the most consistent option for SRKN control on sweet potato, but fluazaindolizine, oxamyl or combinations of the two products can also be effective.</p></abstract>

Southern root-knot nematode (SRKN, Meloidogyne incognita) is a major pest of sweet potato, and nematicides are needed to manage this nematode. The objectives of this study were to assess the efficacy of fluazaindolizine, a new non-fumigant nematicide, in comparison with the fumigant nematicide 1,3-dichloropropene (1,3-D) and non-fumigant nematicides fluopyram and oxamyl for (1) SRKN management, (2) impacts on free-living nematodes, and (3) sweet potato yield in field trials. Among all nematicides, 1,3-D at 84 kg/ha most consistently (2 of 3 years) managed SRKN soil populations and improved yield. Fluazaindolizine at 2.24 kg/ha and fluazindolizine at 1.12 kg/ha plus oxamyl at 2.14 kg/ha managed SRKN populations and improved yield in 1 of 3 years, whereas fluazaindolizine alone at 1.12 kg/ha only decreased SRKN populations. Fluopyram at 238 g/ha did not affect SRKN or yield. Nematicide application also had non-target effects on free-living nematodes with 1,3-D reducing abundances relative to untreated most frequently (2018 and 2020), but other nematicides also reducing free-living nematode abundances in 2020. In summary, 1,3-D is the most consistent option for SRKN control on sweet potato, but fluazaindolizine, oxamyl or combinations of the two products can also be effective.

<italic>Meloidogyne incognita</italic> Management Using Fumigant and Non-fumigant Nematicides on Sweet Potato

Journal of Nematology

This work is licensed under the Creative Commons Attribution 4.0 International License.

 Management Using Fumigant and Non-fumigant Nematicides on Sweet Potato

Southern root-knot nematode (SRKN, Meloidogyne incognita) is a major pest of sweet potato, and nematicides are needed to manage this nematode. The objectives...

Meloidogyne incognita Management Using Fumigant and Non-fumigant Nematicides on Sweet Potato

Article Category: Research Paper

Published Online: Jul 29, 2022

Page range: -

Received: Mar 14, 2022

DOI: https://doi.org/10.2478/jofnem-2022-0026

Keywords
1,3-dichloropropene, fluazaindolizine, fluopyram, free-living nematode, fumigant, management, nematicide, oxamyl, southern root-knot nematode, sweet potato

© 2022 Liu and Grabau. published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Meloidogyne incognita Management Using Fumigant and Non-fumigant Nematicides on Sweet Potato

Article Category: Research Paper

Published Online: Jul 29, 2022

Page range: -

Received: Mar 14, 2022

DOI: https://doi.org/10.2478/jofnem-2022-0026

Keywords1,3-dichloropropene, fluazaindolizine, fluopyram, free-living nematode, fumigant, management, nematicide, oxamyl, southern root-knot nematode, sweet potato

© 2022 Liu and Grabau. published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
1,3-dichloropropene, fluazaindolizine, fluopyram, free-living nematode, fumigant, management, nematicide, oxamyl, southern root-knot nematode, sweet potato