Occurrence and identity of the causal agents of Wilt/Root-Rot disease in Chickpea in Abu Hamad area, Sudan, Dr. Hanan I. Mudawi, Mohamed O. Idris and Hanaa S. Zawam

Hanan Ibrahim Mudawi
The Environment, Natural Resources and Desertification Research Institute, National Centre for Research, Ministry of High Education, Khartoum, Sudan
Mohamed Osman Idris
Department of Plant Protection, College of Agriculture, Khartoum University, Khartoum, Sudan
Hanaa Sedhum Zawam
Plant pathology Research Institute, Agricultural Research Center, Giza, Egypt

Purpose: A survey was undertaken at Chickpea production areas in Adu Hamad, northern Sudan, for three seasons, 2006/007, 2007/008 and 2008/009, to determine the distribution and population density of plant-parasitic nematodes, their interaction with two Fusarium spp., and the microbial flora associated with chickpea.
Design/methodology/approach: Thirteen Hawashas (fields) were divided into three sectors: north, centre and south. Nematode population density/100g of soil, absolute density, prominence values and their frequency occurrence were recorded. The total fungal and bacterial count, and the neutral pH in the three sectors were also recorded.
Findings: Eleven substantial nematode populations were detected: Aphelenchus avenae, Meloidogyne spp., Ditylenchus dipsaci, Heterodera spp. Rotylenchulus reinformis, Tylenchulus spp. and Criconemoide spp. recorded the highest population density, whereas Helicotylenchus spp., Tylenchorhynchus spp., and Trichodorus spp recorded the lowest. Meloidogyne spp. were the most conspicuous plant-parasitic nematode in the northern and southern sectors, with a high prominence value of 57.14% and 66.70% respectively, and being recovered from 55.38% of soil samples. The total fungal and bacterial count ranged from 7.51310525.133104 and 1.243108–3.253107. The neutral pH of the three sectors explained the affinity of nematodes to highly propagate and the higher number of the bacterial count over the fungal count.
Original/value: for the first time, this survey sheds some light on the presence of some serious plant-parasitic nematodes genera and their distribution in the rhizosphere of chickpea in the Adu Hamad area, and explains its low productivity.
Keywords: Survey; Cicer arietinum; Plant-parasitic nematodes; Wilt/root-rot disease; Sudan
Reference to this paper should be made as follows: Mudawi, H. I., Idris, M. O. and Zawam, H. S. (2018) ‘Occurrence and Identity of the Causal Agents of Wilt/Root-Rot Disease in Chickpea in Abu Hamad Area, Sudan’, Int. J. Sudan Research, Vol. 8, No. 1, pp.01–14.


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