International Journal of Nematology (2005) 15, 174-178

M.M.A. Youssef and Wafaa M.A. EI-Nagdi (2005)
Population density of Meloidogyne incognita on okra as affected by using eggplant as a trap crop and some aromatic and medicinal plant wastes
International Journal of Nematology 15 (2), 174-178
Abstract: Eggplant (Solanum melongena L.) cv. Pusa Purple Long, highly susceptible to Meloidogyne incognita, was tested as a trap crop for managing this pest on okra (Abelmoschus esculentus (L.) Moench) cv. Baladi. Eggplant was cut above the surface of the nematode-infected soil and removed at 4, 8, 12, 16, 24 and 40 days after nematode inoculation. Forty-eight days after subsequently planting okra after each removal period, the nematodes on okra planted 4, 8 and 12 days after nematode inoculation, decreased as indicated by the number of galls and egg masses on roots and juveniles (J2) in soil. On okra planted after these periods, nematode numbers started to increase again as compared to check (48-day-old okra as permanent planting). Hence, it is advisable to remove eggplant, 4-12 days after nematode inoculation and before planting subsequent crops. Plant growth parameters of okra varied in proportion to the final nematode populations.
Dry aerial parts of marjoram (Majorana hortensis) and thyme (Thymus vulgaris) were tested at the rates of 1, 5 and 10 g per pot for managing Meloidogyne incognita on okra cv. Baladi. Thyme extracts significantly (P < 0.05 and 0.01) reduced the number of J2 in soil, galls and egg masses and to a greater extent than marjoram extracts. Okra growth parameters were significantly (P < 0.05 and 0.01) improved by using these plant extracts.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Mahmoud M. Ahmed Youssef

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Meloidogyne incognita	Okra and relatives (Abelmoschus)	Egypt