Comparative Study of Ditylenchus Destructor Thorne, 1945 (Nematoda:tylenchidae), From Potato, Bulbous Iris, and Dahlia, With a Discussion of De Man's Ratios

Wu, Liang-Yu

doi:10.1139/z60-122

Cited by 12 publications

(6 citation statements)

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“…This is evidenced by the relative small CV for ratios and is in agreement with the observations on other groups of nematodes (Wu, 1960;Sturhan, 1963;Bird & Mai, 1967;Baqri & Ahmad, 1981;Brzeski, 1993;Viscardi & Brzeski, 1997). Thus, the ratios have to be in- 12.6 ± 0.7 12.8 ± 0.8 12.7 ± 0.7 13.7 ± 0.8 13.0 ± 0.8 13.8 ± 0.9 13.8 ± 1.1 15.2 ± 1.9 14.2 ± 0.9 (12-14)…”

Section: Discussionsupporting

confidence: 90%

Paratylenchinae: evaluation of diagnostic morpho-biometrical characters of females in the genus Paratylenchus Micoletzky, 1922 (Nematoda: Tylenchulidae)

Brzeski¹,

Háněl²

2000

Nematol

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Examination of morphological variability within single female lines of Paratylenchus microdorus, P. straeleni, P. bukowinensis and P. projectus showed that females offer a limited number of characters useful for differentiation of similar species. The most stable were index V, followed by stylet length, conus length and index m. The most variable were tail length and shape, indices c¢ and c, and these are considered unreliable for separation of similar species. It is concluded that the description of a Paratylenchus species should be based on adults of both sexes as well as resistant juvenile stage. Résumé -Paratylenchinae: évaluation des caractères diagnostiques morpho-biométriques chez les femelles dans le genreParatylenchus Micoletzky, 1922 (Nematoda: Tylenchulidae) -L¢ étude de la variabilité morphologique dans des lignées issues d¢ une femelle de Paratylenchus microdorus, P. straeleni, P. bukowinensis et P. projectus a montré que les femelles possédaient un nombre limité de caractères utiles pour la différenciation d¢ espèces proches. Les plus stables sont le rapport V, puis la longueur du stylet, la longueur du cône et le rapport m. Les plus variables sont la longueur et la forme de la queue, les rapports c¢ et c, ces caractères étant considérés comme inutilisables pour séparer des espèces proches. Il en découle que la description d¢ une espèce de Paratylenchus devrait être fondée tant sur les adultes des deux sexes que sur les stades juvéniles résistants.

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Section: Discussionsupporting

confidence: 90%

Paratylenchinae: evaluation of diagnostic morpho-biometrical characters of females in the genus Paratylenchus Micoletzky, 1922 (Nematoda: Tylenchulidae)

Brzeski¹,

Háněl²

2000

Nematol

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“…The present study indicates a minor variation in stylet length (ST) compared with previous descriptions of D. destructor Thorne, 1945, which might be caused by different host plants. Similar findings have observed that host plants could influence some minor variations in characters [34,35]. In addition, another population isolated from potatoes in China was identified as D. destructor Thorne, 1945, with an ST of 5.7~8.0 µm in females and 6.3~8.0 µm in males [37], which was slightly shorter than that of the M. japonicus population but much shorter than that of the potato populations of D. destructor Thorne, 1945 derived from Canada, Iran, and the USA [34,35,38].…”

Section: Discussionsupporting

confidence: 85%

“…The morphological measurements of the nematode females ( n = 20) and males ( n = 20) are shown in Table 2 . Most morphometric data were consistent with the description of D. destructor Thorne, 1945 [ 4 , 34 , 35 ], with the exception of stylet length (ST). The ST of the Mazus japonicus population was shorter than that of D. destructor Thorne, 1945.…”

Section: Resultssupporting

confidence: 79%

Diagnosis and Characterization of Ditylenchus destructor Isolated from Mazus japonicus in China

Song

Dai

Shi

et al. 2023

Life

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The potato rot nematode (Ditylenchus destructor) is one of the most destructive pests in the production of tuber crops, resulting in severely decreased yields and inferior product quality. In 2021, a great number of nematodes were detected in the roots of Mazus japonicus, a weed that is harmful to crop growth, in Qingdao, Shandong Province, China. The present study was undertaken to characterize and identify the nematodes isolated from M. japonicus through morphological identification and molecular approaches. Their morphological characteristics were highly consistent with the descriptions of D. destructor Thorne, 1945. The nematodes collected from M. japonicus were identified as D. destructor haplotype B using D1/D2 and sequence characterized amplified region (SCAR) primers. PCR-ITS-RFLP analysis was conducted to monitor intraspecific variations. In addition, the phylogenetic analysis of the internal transcribed spacer (ITS) demonstrated that this D. destructor population was clustered in haplotype B, supported by a 100% bootstrap value. Another assay, in which M. japonicus was inoculated with a mixture of the life stages of D. destructor, was performed. This assay showed that M. japonicus exhibited a high susceptibility to D. destructor in pots. This is the first record of D. destructor parasitizing M. japonicus in China, and it is of great importance because M. japonicus could be a potential reservoir for D. destructor in the field.

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“…species of host. Such differences were also noted by Wu (1960) in his study during the Ditylenchus destructor Thorne, 1945 survey. He observed that parameters such as the body width and length, pharynx and stylet length are dependent on the host plant.…”

Section: Resultsmentioning

confidence: 54%

Morphological and molecular characteristics of foliar nematode attacking silver birch (Betula pendula Roth) in Poland

et al. 2017

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SummaryAphelenchoides fragariae (Ritzema Bos, 1890) Christie, 1932 was isolated from leaves of silver birch (Betula pendula Roth) seedlings proving that the source of infection was anemones plants. This is the fi rst report to our best knowledge showing that the source of nematode infection of a woody plant could be a perennial plant. A. fragariae was identifi ed by morphometric and molecular analyses. Morphological diagnosis based on the bending shape of the tail of males and pronounced apex and rostrum proved to be the most accurate reliable characteristic. On the opposite, the high variability of the mucron shape in female tails made the identifi cation by microscopic analyses diffi cult. Identifi cation of the species was confi rmed by analysis of 28S rDNA sequences. The morphometric data of adults extracted from silver birch was compared with that of nematodes isolated from Anemone hupehensis (Lemoine) Lemoine. Males body length varied highly in samples collected from both host plant species.

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Comparative Study of Ditylenchus Destructor Thorne, 1945 (Nematoda:tylenchidae), From Potato, Bulbous Iris, and Dahlia, With a Discussion of De Man's Ratios

Cited by 12 publications

References 1 publication

Paratylenchinae: evaluation of diagnostic morpho-biometrical characters of females in the genus Paratylenchus Micoletzky, 1922 (Nematoda: Tylenchulidae)

Paratylenchinae: evaluation of diagnostic morpho-biometrical characters of females in the genus Paratylenchus Micoletzky, 1922 (Nematoda: Tylenchulidae)

Diagnosis and Characterization of Ditylenchus destructor Isolated from Mazus japonicus in China

Morphological and molecular characteristics of foliar nematode attacking silver birch (Betula pendula Roth) in Poland

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