First Report of Corky Roots of Lettuce (Lactuca sativa) Associated with Paratylenchus projectus

Kwon, Giyoon; Kang, Heonil; Seo, Jongmin; Yun, Eul-Soo; Park, Namsook; Choi, Insoo

doi:10.5423/rpd.2019.25.4.237

Res. Plant Dis

2019

DOI: 10.5423/rpd.2019.25.4.237

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First Report of Corky Roots of Lettuce (Lactuca sativa) Associated with Paratylenchus projectus

Giyoon Kwon¹,

Heonil Kang²,

Jongmin Seo³

et al.

Abstract: Severe damage on a greenhouse grown lettuce (Lactuca sativa L.) associated with Paratylenchus projectus is described for the first time. There were no marketable lettuce in entire greenhouse after three months of planting. Lettuce roots system appeared corky and most of feeder rootlets disappeared. Population densities of P. projectus were ranged from 320-11,600 nematodes per 100 cm 3 of soil. In an inoculation test in a greenhouse, P. projectus is proved as a causal agent of lettuce damage.

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Searching for Rotationable Vegetables for Paratylenchus projectus in Lettuce Greenhouse

권¹,

서²,

박³

et al. 2020

Res. Plant Dis

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The severe lettuce damage caused by Paratylenchus projectus was first reported in 2019 in Korea. To find high-value rotation crops for the control of P. projectus, nine vegetables, Brassica juncea (leaf mustard), B. rapa subsp. nipposinica (kyona), B. oleracea var. italica (broccoli), B. rapa subsp. chinensis (bok choy), B. oleracea var. viridis (kale), B. oleracea var. gongylodes (kohlrabi), Cichorium endivia (endive), C. intybus (chicory), Ipomoea aquatica (morning glory) were planted in d-10-cm clay pots in greenhouse. The growth of vegetables was compared between inoculated with 3,000 P. projectus per 100 cm 3 of soil and non-inoculated. Treatments were replicated 10 times. After 100 days, the reduction of fresh top weight was 30.4% in C. intybus, 35.1% in I. aquatica, 36.9% in B. oleracea var. acephala, 40.5% in C. endivia, 42.1% in B. rapa, 47.5% in B. rapa subsp. nipposinica, 50.4% in B. oleracea var. gonglodes, 56.3% in B. oleracea var. italica, and 66.0% in B. juncea. Nematode multiplication rates (Pf/Pi) were lower in I. aquatica (0.64) and C. endivia (1.1), but higher in B. oleracea var. gongylodes (2.54). Considering these results, I. aquatica is suitable for the rotation crop with lettuce until better rotation crops developed.

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Searching for Rotationable Vegetables for Paratylenchus projectus in Lettuce Greenhouse

권¹,

서²,

박³

et al. 2020

Res. Plant Dis

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Occurrence of Plant-Parasitic Nematodes on Ornamental Foliage Plants, Citrus Orchards, and Tea Plantations in Korea

Huh,

Park,

Kim

et al. 2023

Res. Plant Dis

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This study was conducted to investigate the plant-parasitic nematodes of ornamental foliage plants, citrus orchards, and tea plantations from July to December 2022. As a result of the investigation of plant-parasitic nematodes in 415 foliage plants, root-lesion nematodes were detected most frequently, followed by rootknot nematodes, pin nematodes, and other nematodes. In tea plantations, spiral nematodes, cyst nematodes, and root-knot nematodes were detected. Citrus nematodes, ring nematodes, and root-knot nematodes were discovered in citrus orchards. In foliage plants, tea plantations, and citrus orchards, the detection rate of plantparasitic nematodes was not high, but root-lesion nematodes were detected. Therefore, it is necessary to apply appropriate control methods to manage root-lesion nematodes during the cultivation of foliage, tea, and citrus plants.

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First Report of Corky Roots of Lettuce (Lactuca sativa) Associated with Paratylenchus projectus

Cited by 2 publications

References 2 publications

Searching for Rotationable Vegetables for Paratylenchus projectus in Lettuce Greenhouse

Searching for Rotationable Vegetables for Paratylenchus projectus in Lettuce Greenhouse

Occurrence of Plant-Parasitic Nematodes on Ornamental Foliage Plants, Citrus Orchards, and Tea Plantations in Korea

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