Pakistan Journal of Nematology (2004) 22, 151-155

W.M.A. El-Nagdi and M.M.A. Youssef (2004)
Use of okra as a trap crop for managing the root-knot nematode, Meloidogyne incognita and cellular alterations in nematode-infected root
Pakistan Journal of Nematology 22 (2), 151-155
Abstract: Under greenhouse conditions, okra (Abelmoschus esculentus (L.) Moench) cv. Baladi, highly susceptible to Meloidogyne incognita root-knot nematode, was tested as trap crop for managing this pest. Plants were uprooted from the infected soil 4, 8, 16, 24, 32 and 48 days after nematode
inoculation. M. incognita began to develop to mature females after the 8th day from nematode inoculation, then started to lay eggs in gelatinous matrices after the 16th day. Hence, it is advised to pull out okra susceptible cultivar within the period after the 16th day from nematode inoculation. Cellular alternations in the root of okra resulting from infection with the root-knot nematode, M. incognita were studied. The feeding site (giant cells) of the nematode was mainly confined in the stele region. Cells of the feeding site showed thickening of cell walls with granular cytoplasm and enlarged nuclei and the giant cells were surrounded by hyperplasia tells. Giant cells in a cluster had distinct, thickened boundary walls and occupied the stele region.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Wafaa M.A. El-Nagdi, Mahmoud M. Ahmed Youssef

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
damage/losses/economics

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Pest and/or beneficial records:

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