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Plant Parasitic Nematodes in the Sudan

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For more content, see Nematology.

Some 24 species of plant parasitic nematodes were found associated with 27 crop plants, one ornamental plant and 4 weeds in cultivated soils of the Gezira area and other localities in the Sudan. Among the predominant forms were Meloidogyne, Pratylenchus, Tylenchulus, Longidorus and Xiphinema species. Meloidogyne species (M. arenaria, M. incognita and M. javanica) were wide-spread in many vegetable crops, tobacco and some of the fruit trees and weed plants in river silt and in light volcanic soils of western Sudan. They were not present in high densities in cotton or other crops grown on the Gezira heavy clay. Pratylenchuf species were wide-spread in soils under cotton in the Gezira area but usually in small numbers. They were highly pathogenic to cotton and there is evidence of a synergistic association with the fungus, Fusarium oxysporum f. vasinfectum causing vascular wilt of cotton. Crops grown in notation with cotton in the Gezira behaved as good hosts of these nematodes under field conditions at the GRS. P. sudanensis was dominant. Tylenchulus semipenetrans was wide-spread in the Gezira area in grape fruit, lemon and orange. Longidorus (L. africunus, L. brevicaudatus, L. laevicapitatus and possibly a new species) and Xiphinema (X. basiri and X. simillimum) were also wide-spread both in the Gezira heavy clay and in river silt, although mostly in small numbers.

Affiliations: 1: Gezira Research Station, Wad Medani, Sudan; 2: State Agricultural University, Wageningen, The Netherlands

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/content/journals/10.1163/187529270x00775
1970-01-01
2016-12-11

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