Reaction of some rice (Oryza sativa L.) varieties to brown spot disease caused by Bipolaris oryzae (Breda de Haan) Shoemaker
1 Laboratory of Plant Pathology, Department of Plant Biology, Faculty of Science, University of Yaoundé I, P O Box: 812 Yaoundé-Cameroon.
2 Department of Biochemistry, University of Yaoundé 1, P O Box: 812 Yaoundé-Cameroon.
3 Department of Biological Sciences, Faculty of Science, University of Maroua, PO Box 814 Maroua, Cameroon.
4 Higher Technical Teacher’s Training College, Department of Agriculture and Agropastoral, Ebolowa, Cameroon.
Research Article
Magna Scientia Advanced Research and Reviews, 2021, 02(02), 028–036
Article DOI: 10.30574/msarr.2021.2.2.0008
Publication history:
Received on 28 January 2021; revised on 18 May 2021; accepted on 20 May 2021
Abstract:
In Africa, rice is produced and is a source of food energy in most developing countries. But its cultivation faces to brown spot disease, caused by Bipolaris oryzae (Breda de Haan) Shoemaker, which is a serious seed-borne and seed transmitted disease of rice worldwide.The aim of this study was to screen rice varieties for resistance to brown spot disease in field conditions inYaoundé. A completely randomized Fisher block design with three repetitions was used during 2 growing seasons (2015 and 2016). Growth, yields and disease (incidence and severity) parameters were evaluated on four rice varieties (Nerica 3 and 8, White rice and Kamkou). Results show that height of the Nerica 8 variety (86.03cm) and the number of tillers of Kamkou variety (21.66) were significantly highest compared to others varieties (P<0.05) at 59 Days After Sowing (DAS). There was no significant difference on disease incidence for the different rice varieties at the end of rice plant cycle. However disease severity was lower on Nerica 3(2.71%) and Nerica8 (2.05%) varieties and higher on White variety (4.57%). Hence, Nerica 3 and 8 varieties were more tolerant to brown spot disease than others varieties. Overall, Nerica 3 (3.68 t ha-1) and Kamkou (3.51 t ha-1) varieties resulted in higher yields than white rice 28.93 t ha-1.
Keywords:
Oryza sativa; Varieties; Disease; Resistance; Yield
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