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

Md Shah Alam

Md Shah Alam

Clemson University, Department of Plant and Environmental SciencesClemson,
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Alam, Md Shah
, 
Churamani Khanal

Churamani Khanal

Clemson University, Department of Plant and Environmental SciencesClemson,
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Khanal, Churamani
, 
Joseph Roberts

Joseph Roberts

Clemson University, Department of Plant and Environmental Sciences, Pee Dee Research and Education, FlorenceFlorence,
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Roberts, Joseph
 and 
William Rutter

William Rutter

USDA-ARS, US Vegetable LaboratoryCharleston,
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Rutter, William
  
Jun 05, 2023
Impact of non-fumigant nematicides on reproduction and pathogenicity of Meloidogyne enterolobii and disease severity in tobacco's Cover Image
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Article Category: Research Paper
Published Online: Jun 05, 2023
Received: Mar 09, 2023
DOI: https://doi.org/10.2478/jofnem-2023-0025
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© 2023 Md Shah Alam et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1:

Reproduction of M. enterolobii expressed as number of eggs per root system of tobacco (A) and as number of J2 per 100 cm3 of soil (B). Data were combined over two experiments and are means of 10 replications. Data were log transformed and the treatment means followed by a common letter are not significantly different according to Tukey's HSD test (P ≤ 0.05). The treatment means in the figure represent untransformed values. Burkholderia refers to Burkholderia rinojensis strain A396 secondary metabolites.
Reproduction of M. enterolobii expressed as number of eggs per root system of tobacco (A) and as number of J2 per 100 cm3 of soil (B). Data were combined over two experiments and are means of 10 replications. Data were log transformed and the treatment means followed by a common letter are not significantly different according to Tukey's HSD test (P ≤ 0.05). The treatment means in the figure represent untransformed values. Burkholderia refers to Burkholderia rinojensis strain A396 secondary metabolites.

Figure 2:

Dry weights of tobacco shoot (A) and root (B) inoculated with M. enterolobii. The plant materials were dried at 45°C for 2 wk. Data were combined over two experiments and are means of 10 replications. Treatment means followed by a common letter are not significantly different according to Tukey's HSD test (P ≤ 0.05). Burkholderia refers to Burkholderia rinojensis strain A396 secondary metabolites.
Dry weights of tobacco shoot (A) and root (B) inoculated with M. enterolobii. The plant materials were dried at 45°C for 2 wk. Data were combined over two experiments and are means of 10 replications. Treatment means followed by a common letter are not significantly different according to Tukey's HSD test (P ≤ 0.05). Burkholderia refers to Burkholderia rinojensis strain A396 secondary metabolites.

Figure 3:

Root gall index as influenced by the application of nematicides. Gall rating was conducted on a scale of 0 -10 (0 = no galls, and 10 = completely galled roots) as described by Bridge and Page (1980). Data were combined over two experiments and are means of 10 replications. Treatment means followed by a common letter are not significantly different according to Tukey's HSD test (P ≤ 0.05). Burkholderia refers to Burkholderia rinojensis strain A396 secondary metabolites.
Root gall index as influenced by the application of nematicides. Gall rating was conducted on a scale of 0 -10 (0 = no galls, and 10 = completely galled roots) as described by Bridge and Page (1980). Data were combined over two experiments and are means of 10 replications. Treatment means followed by a common letter are not significantly different according to Tukey's HSD test (P ≤ 0.05). Burkholderia refers to Burkholderia rinojensis strain A396 secondary metabolites.

Non-fumigant and biological nematicides with their product application rates employed in the current study_

Treatment Application rate (L/ha) Nematicide/pot (μl)
Oxamyl 4.68 16.55
Fluopyram 1.00 0.06
Fluensulfone 8.18 0.48
aBurkholderia 18.71 37.85
Untreated control - -
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