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University of Gezira (2014)

Compatibility of Pesticides and Fertilizers with Two Fungal Isolates (Fusarium nygamai Bergess and Trimboli Fusarium abuharaz) in controlling Witchweed (Striga hermonthica (Del.) Benth.) in Sorghum

SAAD, EPTIHAL SAAD YOSIF

Titre : Compatibility of Pesticides and Fertilizers with Two Fungal Isolates (Fusarium nygamai Bergess and Trimboli Fusarium abuharaz) in controlling Witchweed (Striga hermonthica (Del.) Benth.) in Sorghum

Auteur : SAAD, EPTIHAL SAAD YOSIF

Université de soutenance : University of Gezira

Grade : Master of Science (MS) in Plant Pathology 2014

Résumé
Sorghum is the second most important cereal crop after maize in sub-Saharan Africa and it is the main staple food for about 300 million people. In the Sudan, the area under sorghum is estimated at 6 million ha-1, with an average production of 4.2 million tone per year. In the Sudan, sorghum is heavily infested with Striga, which results in significant yield losses of 70%-100%. The main objective of this study was to find compatibility of F. abuharaz and F. nygamai with sorghum insecticides Sevein (N-Methyl carbamate) and Furadan (Carbofuran), herbicides 2,4-D and Goal (Oxyfluorfen), fungicides Theram and Apron (Metalaxyl) and Urea. The experiments were conducted in the laboratory, in pots and in the field at Abu Haraz, Faculty of Agriculture and Natural Resources, University of Gezira, Wad Medani, Sudan. In the laboratory experiments, the combination of Fusarium sp. abuharaz isolate (FA) and Fusarium nygamai (FN) with Furadan and Goal, irrespective of rates, increased fungal growth by 4%- 25% and 4% – 53%, respectively. The combination of FA and FN with urea, irrespective of rates, obtained comparable fungal growth in comparison to that obtained by the fungi alone. Sevein, irrespective of rates, inhibited fungal growth by 4% -50%. The two fungicides (Theram and Apron) significantly reduced FA and FN growth. In pot and field experiments, the combination of FA and FN with Furadan, irrespective of rates, completely inhibited Striga parasitism and improved sorghum yield.

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