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Reproduction of Meloidogyne enterolobii on Onion and Potential Yield Suppression

Nabin Poudel

Nabin Poudel

Department of Plant Pathology, University of GeorgiaTifton,
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Poudel, Nabin
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Richard F. Davis

Richard F. Davis

United States Department of Agriculture – Agricultural Research Service, Crop Genetics and Breeding Research UnitTifton,
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Davis, Richard F.
, 
Ted McAvoy

Ted McAvoy

Department of Horticulture, University of GeorgiaTifton,
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McAvoy, Ted
, 
Bhabesh Dutta

Bhabesh Dutta

Department of Plant Pathology, University of GeorgiaTifton,
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Dutta, Bhabesh
 und 
Intiaz Amin Chowdhury

Intiaz Amin Chowdhury

Department of Plant Pathology, University of GeorgiaTifton,
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Chowdhury, Intiaz Amin
  
22. Apr. 2025
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Artikel-Kategorie: Research Paper
Online veröffentlicht: 22. Apr. 2025
Eingereicht: 24. Sept. 2024
DOI: https://doi.org/10.2478/jofnem-2025-0005
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© 2025 Nabin Poudel et al., published by Sciendo
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Figure 1:

Root gall indices for cultivars of onion following M. enterolobii inoculation (0 to 10 scale). Bars represent the Root Gall Index (mean ± standard error). Values are pooled data from two trials. Bars with the same letter are not significantly different according to Tukey's HSD test (α = 0.05).
Root gall indices for cultivars of onion following M. enterolobii inoculation (0 to 10 scale). Bars represent the Root Gall Index (mean ± standard error). Values are pooled data from two trials. Bars with the same letter are not significantly different according to Tukey's HSD test (α = 0.05).

Figure 2:

Effect of Meloidogyne enterolobii on fresh bulb weights of onion cultivars. Bars represent the fresh bulb weight (mean ± standard error). Values are pooled data from two trials. Two independent t-tests were done in two samples to identify differences between inoculated and non-inoculated control treatments. * and *** represent the 5% and 0.1% level of significance, respectively.
Effect of Meloidogyne enterolobii on fresh bulb weights of onion cultivars. Bars represent the fresh bulb weight (mean ± standard error). Values are pooled data from two trials. Two independent t-tests were done in two samples to identify differences between inoculated and non-inoculated control treatments. * and *** represent the 5% and 0.1% level of significance, respectively.

Figure 3:

Effect of Meloidogyne enterolobii on fresh shoot weights of onion cultivars. Bars represent the fresh shoot weight (mean ± standard error). Values are pooled data from two trials. Two sample-independent t-tests were done to identify differences between inoculated and non-inoculated control treatments. * and *** represent the 5% and 0.1% level of significance, respectively.
Effect of Meloidogyne enterolobii on fresh shoot weights of onion cultivars. Bars represent the fresh shoot weight (mean ± standard error). Values are pooled data from two trials. Two sample-independent t-tests were done to identify differences between inoculated and non-inoculated control treatments. * and *** represent the 5% and 0.1% level of significance, respectively.

Figure 4:

Effect of Meloidogyne enterolobii on dry shoot weights of onion. Bars represent the fresh bulb weight (mean ± standard error). Values are pooled data from two trials. Two sample independent t-tests were done to identify differences between inoculated and non-inoculated control treatments. * and *** represent the 5% and 0.1% level of significance, respectively.
Effect of Meloidogyne enterolobii on dry shoot weights of onion. Bars represent the fresh bulb weight (mean ± standard error). Values are pooled data from two trials. Two sample independent t-tests were done to identify differences between inoculated and non-inoculated control treatments. * and *** represent the 5% and 0.1% level of significance, respectively.

Susceptibility of ten onion cultivars to Meloidogyne enterolobii_

Onion cultivars Number of eggs/roots system Number of eggs/grams of root Reproduction factor (Rf)x
Trial 1 Trial 2 Trial 1 Trial 2 Trial 1 Trial 2
Monjablanca 17,190y abz 10,560 b 2,223 ab 1,447 b 4.78 ab 3.38 b
Rio del Sol 16,280 ab 12,978 b 1,982 ab 1,596 b 4.52 ab 4.16 b
Sapelo 11,546 b 13,667 b 1,407 b 1,709 b 3.21 b 4.58 b
Sweet Magnolia 11,997 b 11,574 b 1,474 b 1,441 b 3.33 b 3.71 b
Tania 22,999 ab 28,160 a 2,806 ab 3,657 a 6.39 ab 9.03 a
Vidora 27,930 a 20,915 ab 3,406 a 2,477 ab 7.76 a 6.70 ab
NUN 1011 21,137 ab 20,519 ab 2,632 ab 2,374 ab 5.87 ab 6.58 ab
Red Duke 20,322 ab 20,415 ab 2,257 ab 2,258 ab 5.64 ab 6.54 ab
Red Halen 21,373 ab 17,883 ab 2,466 ab 2,042 ab 5.94 ab 5.73 ab
Red Maiden 17,947 ab 16,090 ab 2,145 ab 1,886 b 4.99 ab 5.16 ab
P-value 0.01 0.0012 0.0251 0.0042 0.01 0.0012
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