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Reproduction of Meloidogyne enterolobii on selected root-knot nematode resistant sweetpotato (Ipomoea batatas) cultivars

Janete A. Brito

Janete A. Brito

Florida Department of Agriculture and Consumer Services, Division of Plant IndustryGainesville, US
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Brito, Janete A.
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Johan Desaeger

Johan Desaeger

Entomology and Nematology Department, Gulf Coast Research and Education Center, University of FloridaWimauma, US
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Desaeger, Johan
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D.W. Dickson

D.W. Dickson

Entomology and Nematology Department, Institute of Food and Agricultural Sciences, University of FloridaGainesville, US
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Dickson, D.W.
  
21 lug 2020
Reproduction of Meloidogyne enterolobii on selected root-knot nematode resistant sweetpotato (Ipomoea batatas) cultivars's Cover Image
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Pubblicato online: 21 lug 2020
Pagine: 1 - 6
Ricevuto: 20 apr 2020
DOI: https://doi.org/10.21307/jofnem-2020-063
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© 2020 Janete A. Brito et al., published by Sciendo.
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1:

Sweetpotato cv. Hernandez infected with Meloidogyne enterolobii. (A) Symptoms induced in the storage roots 90 days after nematode inoculation; (B) Necrosis and cracks of storage roots, induced by M. enterolobii; also, noticeable galls and egg masses on fibrous roots; (C) A close up of the galls and large egg masses on both fibrous and storage roots; and (D) Close up of necrosis and cracks in storage roots.
Sweetpotato cv. Hernandez infected with Meloidogyne enterolobii. (A) Symptoms induced in the storage roots 90 days after nematode inoculation; (B) Necrosis and cracks of storage roots, induced by M. enterolobii; also, noticeable galls and egg masses on fibrous roots; (C) A close up of the galls and large egg masses on both fibrous and storage roots; and (D) Close up of necrosis and cracks in storage roots.

Response of five sweetpotato (Ipomaea batatas) cultivars to inoculation with Meloidogyne enterolobii in this study_

Factor Fibrous fresh root weightu (g) Gall indexv Egg mass indexv Eggs per egg mass Eggs per fibrous fresh root weight Eggs per gram fresh rootx RFw
Sweetpotato cultivar t
Beauregard 15.21 bc 4.65 a 3.65 b 475 a 30,975 c 2,668 c 6.20 c
Covington 14.99 bc 4.25 a 4.45 ab 490 a 84,585 b 5,683 ab 16.92 b
Evangeline 22.70 a 4.65 a 4.80 a 503 a 150,070 a 7,161 a 30.01 a
Hernandez 16.35 b 4.70 a 4.90 a 462 a 113,235 b 6,979 a 22.65 b
Orleans 11.65 c 1.95 b 2.30 c 475 a 42,022 c 3,678 bc 8.41 c
Test
Test 1 15.42 4.24 4.22 504 81,325 5,444 16.27
Test 2 16.94 3.84 3.82 459 87,030 5,024 17.41
F probability cv < 0.001 < 0.001 < 0.001 > 0.50 < 0.001 < 0.001 < 0.001
F probability test 0.12 0.06 0.10 > 0.50 0.46 0.50 0.46
Tomato 37.7 5 5 n/ax 176,340 4,801 35.27
Lingua:
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