<abstract xmlns="http://www.w3.org/1999/xhtml">

<p><italic>Meloidogyne enterolobii</italic> is a highly aggressive quarantine pathogen which threatens the multibillion-dollar tobacco industry and is not manageable with the currently available management methods in tobacco. There is currently no known host plant resistance in tobacco and previous studies have shown that the lower level of the currently recommended rate of non-fumigant nematicides does not provide satisfactory management of <italic>M. enterolobii</italic>. The current study was conducted with the hypothesis that <italic>M. enterolobii</italic> can be better managed using a single soil application of the maximum allowed rate of non-fumigant nematicides. Treatments involved three non-fumigant chemical nematicides (oxamyl, fluopyram, and fluensulfone), a biological nematicide derived from Burkholderia, and a non-treated control. Fluensulfone significantly suppressed the nematode reproduction relative to the control, the suppression being 71% for eggs and 86% for the second stage juveniles (J2). Fluopyram also suppressed nematode reproduction, although this was statistically insignificant, with the suppression being 26% and 37% for eggs and J2, respectively. Oxamyl significantly suppressed J2 (80%), but not eggs (50%) in relation to the control. The most significant reduction of disease severity was achieved by the application of fluensulfone (64%), followed by oxamyl (54%) and fluopyram (48%). Except for fluensulfone, which significantly reduced the root biomass, none of the nematicides significantly impacted root and shoot biomass. The biological nematicide did not significantly affect nematode reproduction, pathogenicity, or disease severity. The results from the current study suggest that while the non-fumigant nematicides provided a good level of the nematode suppression, more research is needed to improve the efficacy of non-fumigant nematicides through employing better application methods or finding better chemistries.</p>
</abstract>

Meloidogyne enterolobii is a highly aggressive quarantine pathogen which threatens the multibillion-dollar tobacco industry and is not manageable with the currently available management methods in tobacco. There is currently no known host plant resistance in tobacco and previous studies have shown that the lower level of the currently recommended rate of non-fumigant nematicides does not provide satisfactory management of M. enterolobii. The current study was conducted with the hypothesis that M. enterolobii can be better managed using a single soil application of the maximum allowed rate of non-fumigant nematicides. Treatments involved three non-fumigant chemical nematicides (oxamyl, fluopyram, and fluensulfone), a biological nematicide derived from Burkholderia, and a non-treated control. Fluensulfone significantly suppressed the nematode reproduction relative to the control, the suppression being 71% for eggs and 86% for the second stage juveniles (J2). Fluopyram also suppressed nematode reproduction, although this was statistically insignificant, with the suppression being 26% and 37% for eggs and J2, respectively. Oxamyl significantly suppressed J2 (80%), but not eggs (50%) in relation to the control. The most significant reduction of disease severity was achieved by the application of fluensulfone (64%), followed by oxamyl (54%) and fluopyram (48%). Except for fluensulfone, which significantly reduced the root biomass, none of the nematicides significantly impacted root and shoot biomass. The biological nematicide did not significantly affect nematode reproduction, pathogenicity, or disease severity. The results from the current study suggest that while the non-fumigant nematicides provided a good level of the nematode suppression, more research is needed to improve the efficacy of non-fumigant nematicides through employing better application methods or finding better chemistries.

Impact of non-fumigant nematicides on reproduction and pathogenicity of <italic>Meloidogyne enterolobii</italic> and disease severity in tobacco

Department of Plant and Environmental Sciences

Department of Plant and Environmental Sciences, Pee Dee Research and Education, Florence

Journal of Nematology

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

Impact of non-fumigant nematicides on reproduction and pathogenicity of  and disease severity in tobacco

Meloidogyne enterolobii is a highly aggressive quarantine pathogen which threatens the multibillion-dollar tobacco industry and is not manageable with the...

Impact of non-fumigant nematicides on reproduction and pathogenicity of Meloidogyne enterolobii and disease severity in tobacco

Article Category: Research Paper

Published Online: Jun 05, 2023

Page range: -

Received: Mar 09, 2023

DOI: https://doi.org/10.2478/jofnem-2023-0025

Keywords
biological, fluensulfone, fluopyram, management, nematicide, non-fumigant, oxamyl, tobacco

© 2023 Md Shah Alam et al., published by Sciendo

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

Impact of non-fumigant nematicides on reproduction and pathogenicity of Meloidogyne enterolobii and disease severity in tobacco

Article Category: Research Paper

Published Online: Jun 05, 2023

Page range: -

Received: Mar 09, 2023

DOI: https://doi.org/10.2478/jofnem-2023-0025

Keywordsbiological, fluensulfone, fluopyram, management, nematicide, non-fumigant, oxamyl, tobacco

© 2023 Md Shah Alam et al., published by Sciendo

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

Keywords
biological, fluensulfone, fluopyram, management, nematicide, non-fumigant, oxamyl, tobacco