Damage thresholds and population dynamics of Pratylenchus penetrans on carrot (Daucus carota L. cv. Nerac) at three different seed densities

Teklu, M.G.; Meressa, Beira Hailu; Radtke, Esther; Been, T.H.; Hallmann, Johannes

doi:10.1007/s10658-016-0898-6

Cited by 8 publications

(5 citation statements)

References 22 publications

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“…The maximum multiplication rate (8813.2) obtained in this study is greater than previously reported values of M. incognita on pepper varieties (Di Vito et al, 1986, 1992Ferris et al, 1986;Abegaz, 2020) which might be due to difference in the host, pathogenicity, method of nematode extraction and duration or extracted time (Teklu et al, 2016).…”

Section: Population Dynamicscontrasting

confidence: 74%

Population Dynamics and Damage Threshold of Meloidogyne incognita to the Dinsire Hot Pepper Variety

Tola,

Muleta,

Assefa

et al. 2023

PJN

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Predicting the damage caused by certain nematode population densities is crucial in deciding whether or not to cultivate pepper and selecting the most suitable management strategies. To understand the relationship between the initial nematode density (Pi) and the final nematode population (Pf), and the damage potential of Meloidogyne incognita to var. Dinsire, a study was conducted under greenhouse conditions. A geometric series of 13 initial densities (0, 0.0625, 0.125, 0.25, 0.5, 1, 2, 4, 8, 16, 32, 64, 128 J2 (g soil) -1 ) of M. incognita was subjected to Dinsire. The treatments were arranged in a randomized complete design with four replications and terminated after 120 days of nematode inoculation. This study showed that the final nematode population, plant growth, and yields decreased as initial nematode inoculums increased. Maximum suppression fresh weight of shoot (43.8%) and fruit (52%) was recorded at Pi ≥ 8 J2 (g soil) -1 . The analysis of Seinhorst's yield loss model indicated the highest tolerance limit (T=0. 64 egg + J2 (g soil) -1 ) recorded for leaf number, while the relative minimum yield (m) of 0.91 and 0. 86 were the highest m values for root length and shoot height, respectively. Furthermore, the maximum multiplication rate (a) and population densities (M) were estimated as 8813.2 and 3420.1 (eggs and J2 (g soil) -1 ), respectively. Therefore, evaluating hot pepper varieties for resistance using a wide range of Pi could generate more reliable information on the host status of pepper varieties.

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Section: Population Dynamicscontrasting

confidence: 74%

Population Dynamics and Damage Threshold of Meloidogyne incognita to the Dinsire Hot Pepper Variety

Tola,

Muleta,

Assefa

et al. 2023

PJN

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“…The damage threshold for P. penetrans can vary a lot between vegetables. The damage thresholds for P. penetrans for faba bean and carrot were 6.2 (g soil) −1 and 1.37-1.88 (g dry soil) −1 , respectively (Seinhorst, 1998;Teklu et al, 2016). These numbers are equivalent to 868 and 192-263 P. penetrans (100 ml soil) −1 .…”

Section: Discussionmentioning

confidence: 99%

“…Pratylenchus penetrans was multiplied on carrot discs (O'Bannon & Taylor, 1968) and in pots on maize (Teklu et al, 2016) to ensure sufficient nematode numbers for the experiments. The population was originally collected from maize roots in Kinrooi (Belgium) and had been maintained on carrot discs since 2006.…”

Section: Multiplication Of P Penetransmentioning

confidence: 99%

Pratylenchus penetrans, a potential risk in glasshouse-grown lettuce: population dynamics and damage threshold

Claerbout

Neukermans

Vandevelde³

et al. 2020

Nematol.

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Summary The root-lesion nematode, Pratylenchus penetrans, causes growth reduction in glasshouse-grown lettuce and is mainly controlled by chemical soil disinfestation. Integrated management strategies require more knowledge about the population dynamics and damage threshold densities. We monitored the population during 2.5 years in a commercial glasshouse by sampling soil in the same four 1 m2 spots at 0-30 cm and 30-60 cm depth. The grower grew lettuce in rotation with leek, applied 1,3-dichloropropene in summer and left the field fallow during winter. Growing leek reduced the nematode population slightly but chemical soil disinfestation lowered the numbers drastically, although 41% of the nematodes in the deeper layer survived. Black fallow resulted in a slight increase of the population, probably due to hatching. Two pot experiments with ten densities of P. penetrans were conducted to estimate the damage threshold for a summer and autumn cultivar (‘Cosmopolia’ and ‘Brighton’, respectively). The thresholds for lettuce weight were 669 and 3834 P. penetrans (100 ml soil)−1 in summer and autumn, respectively, but with considerable variability in estimated parameters. The thresholds for root damage were much lower: 204 and 48 P. penetrans (100 ml soil)−1. Nematode numbers did not increase on lettuce in the pot tests (maximum multiplication rate was 0.40) but increased slightly in the commercial setting. These results show that populations of P. penetrans build up slowly when butterhead lettuce is rotated with leek and fallow, but chemical soil disinfestation is required to avoid numbers resulting in root damage.

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“…Nematodes must feed on plants to complete their life cycle, so planting two short-season crops such as pea or snap bean with a bare fallow mid-season can reduce reproduction. Damping the increase of P. penetrans decreases the need for aggressive measures such as fumigation in the potato year and increases the profitability of the targeted crop, as P. penetrans decreases yield of maize (MacGuidwin and Bender, 2016), soybean (Saikai and MacGuidwin, unpublished results), and carrot (Teklu et al, 2016). Verticillium dahliae has a more restrictive host range so new propagules of the fungus are not added during the rotation.…”

Section: Recommended Integrated Nematode Management (Inm)mentioning

confidence: 99%

Integrated Nematode Management

Solaimalai¹,

Anantharaju²,

Irulandi³

et al. 2020

Maize Crop

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Damage thresholds and population dynamics of Pratylenchus penetrans on carrot (Daucus carota L. cv. Nerac) at three different seed densities

Cited by 8 publications

References 22 publications

Population Dynamics and Damage Threshold of Meloidogyne incognita to the Dinsire Hot Pepper Variety

Population Dynamics and Damage Threshold of Meloidogyne incognita to the Dinsire Hot Pepper Variety

Pratylenchus penetrans, a potential risk in glasshouse-grown lettuce: population dynamics and damage threshold

Integrated Nematode Management

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