ISHS Acta Horticulturae 143: VIII African Symposium on Horticultural Crops
ROOT-KNOT NEMATODE PROBLEMS ON VEGETABLE CROPS IN THE SUDAN |
| Author: | A.M. Yassin |
| Abstract:
Not more than a few qualified nematologists are at present engaged in nematological studies. Since serious nematological investigations started about a decade ago, some 70 species of plant parasitic nematodes have been detected in and around the roots of many cultivated and weed plants in various localities throughout the country (Yassin, Loof and Oostenbrink, 1970; Decker, Yassin and El Amin, 1980). Amongst the most important by far, however, are the root-knot nematodes (Yassin, 1974; Yassin and El Amin, 1982; Yassin and Zeidan, 1979, 1982). In fact root-knot nematodes are considered amongst the most important tropical parasites the world over; the Sudan is not an exception. They were thus found to be widely distributed in this vast country in river silt along the Nile bank and also in light alluvial soils; e.g. of western and southern sectors, but not under the Gezira heavy clay. In these localities they can infest many crop and weed plants but those most severely affected are vegetables and tobacco. A total of 5 species are thus far identified (Decker et al., 1980), but the most common, and perhaps most economically important, are M. incognita and M. javanica (Yassin, 1974). While M. javanica can inflict heavy damage especially in tomato and tobacco in the northern sector, M. incognita is more prevalent in the south, both on tomato and eggplant (Yassin, 1974). The major objectives of the article within hand, are: (1) - to cast light on the economic importance of major species of root-knot nematodes within the Sudan, (2) - outline research findings on certain ecological traits of such species as to aid in the foundation of an integrated control strategy. (3) - pin-point future lines of investigation within the International Meloidogyne Project (IMP). | |
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