3 research outputs found
Resistance of Newly Introduced Vegetables to Meloidogyne arenaria and M. incognita in Korea
To select resistant vegetables against two species of root-knot nematodes, M. incognita and M. arenaria, 39
vegetables belongs to 7 families, 13 genera, 25 species were screened in greenhouse pot test. Susceptible
vegetables to both nematodes were amarath and leaf beet in Amaranthaceae, Malabar spinach in Basellaceae,
Moroheiya in Tiliaceae, and Water-convolvulus in Convolvulaceae, Pak-choi in Brassica campestris var.
chinensis, Tah tasai in B. campestris var. narinosa, B. campestris var. chinensis x narinosa, Leaf mustard,
Mustard green in B. juncea, Kyona in B. juncea var. laciniate, Choy sum in B. rapa subsp. arachinenesis,
Kairan in B. oleracea var. alboglabra, Arugula in Eruca sativa, Garland chrysanthemum in Chrysanthemum
coronarium, Endive in Cichorium endivia, Artichoke in Cynara cardunculus var. scolymus, Lettuce in Lactuca
sativa. Resistant to M. arenaria but susceptible to M. incognita were B. oleracea cv. Matjjang kale, B. oleracea
var. gongyloides cv. Jeok kohlrabi, and C. intybus cv. Radicchio. Resistant vegetables to both nematodes were
C. intybus cv. Sugar loaf, Grumoro, Radichio treviso, B. oleracea cv. Manchu collard, Super matjjang, B.
oleracea italica, B. oleracea var. botrytis italiana, and Perilla in Lamiaceae. Vegetables resistant to both species
of root-knot nematodes could be used as high-valued rotation crops in greenhouses where root-knot
nematodes are problem
Resistance of Commercial Tomato Cultivars to Meloidogyne arenaria and M. incognita
Root-knot nematodes (Meloidogyne spp.) are among the main pathogens of greenhouse crops worldwide.Plant resistance is currently the method of choice for controlling these pests. To select resistant tomato againsttwo common species of root-knot nematodes, M. incognita and M. arenaria, 36 commercial tomato(Lycopersicon esculentum Mill.) cultivars were screened. Seventeen tomato cultivars were resistant to bothroot-knot nematodes: six in cherry tomato, ‘Tenten’, ‘Cadillac’, ‘Cutti’, ‘Sweet’, ‘Ppotto’, ‘Lycopin-9’, eightin globe tomato, ‘Lovely 240’, ‘Dotaerang Dia’, ‘Cupirang’, ‘Dotaerang Master’, ‘Super Dotaerang’,‘Dotaerang Season’, ‘Miroku’, ‘Hoyong’, and three in root stock, ‘Special’, ‘Fighting’, and ‘Magnet’
Screening of Plant Extracts for Nemastatic Activity
against Rhabditis sp. by 96-well microplate bioassay. The plant extracts with a concentration of 5,000 μg/ml
were mixed with aqueous nematode solution containing about 20 Rhabditis sp. and their activity was examined
daily for 7 days. Out of 2,714 plant extracts examined in this test, 2,362 (87.0%) showed no negative influence
on the nematode activity, while 187 (6.9%) inhibited nematode activity about 50%, 95 (3.5%) inhibited
nematode activity over 90%, and 70 (2.6%) rather enhanced nematode activity. Among those showing over
50% nemastatic activity, 25 extracts were randomly selected for further screening with Rhabditis sp. and with
juveniles of Meloidogyne incognita. The screening revealed that 11 extracts (44%) were consistently