Field trials were conducted in the dry (Experiment I) and wet (Experiment II) seasons of 1997 at Samaru (11°11' N, 7°38' E, 686 m above sea level) in the northern Guinea Savanna ecological zone of Nigeria to study the effects of nitrogen rates on the reaction of upland rice (Oryza sativa L.) varieties to Striga hermonthica (Del.) Benth. The results indicate that FARO 48, a variety normally susceptible to Striga hermonthica, exhibited resistance. FARO 11 exhibited tolerance, while FARO 38, FARO 46 and FARO 45 exhibited susceptibility. The application of 90 and 120 kg N/ha delayed and reduced Striga emergence on the crop, induced a low crop reaction score and produced grain yields that were the maximum or significantly higher than the least. No significant differences in Striga infestation were observed between nitrogen rates of 30-120 kg N/ha. The significant interaction between upland rice varieties and nitrogen rates indicates that the susceptible varieties require higher rates of nitrogen to ameliorate the effect of Striga compared with the resistant varieties.
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Riches, C. R., Johnson, D. E., Jones, M. P. 1996: The selection of resistance to Striga species in upland rice. pp. 674-680. In: Moreno, M. T., Cubero, J. E., Berner, D., Joel, D., Musselman, L. J., Parker, C. (eds.), Advances in Parasitic Plant Research. Proceedings 6th International Plant Parasitic Weed Symposium, 16-18 April, 1996, Cordoba, Spain.
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The selection of resistance to Striga species in upland rice. Advances in Parasitic Plant Research674680)| false
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Cultural and edaphic aspects of witchweed control99106)| false
Adeosun, J. O. 1990: Evaluation of sowing date, nitrogen level, variety and herbicides for the control of Striga hermonthica (Del.) Benth in Sorghum (Sorghum bicolor L. Moench). M.Sc. Thesis, Ahmadu Bello University, Zaria, Nigeria, 102 p.
Emechebe, A. M. 1991: Pan-African Striga Control Network (PASCON). Feasibility and Relevance. A Consultancy Report submitted to FAO Regional Office for Africa. 59 p.
Adetimirin, V. O., Kim, S. K., Akenova, M. E. 1997: Relationships between Striga hermonthica infestation and host plant damage in maize (Zea mays L.) as a basis of selection for resistance. pp. 736-741. In: Lagoke, S. T. O., Van der Stratein, L. E., M'Boob, S. S. (eds.), Integrated Management of Striga for the African Farmers. Proceeding 3rd General Workshop of the Pan African Striga Control Network (PASCON), 18-23 October 1993, Harare (Zimbabwe), Accra, (Ghana) FAO.
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Relationships between Striga hermonthica infestation and host plant damage in maize (Zea mays L.) as a basis of selection for resistance736741)| false
Babiker, A. G. T. 1991: Integrated approach to Striga control in food grain production in East Africa. SAFGRAD International Network Conference on Food Grain Research and Production in Semi-Arid Africa, 8-11 March, 1991, Niamey (Niger).
Johnson, D. E., Riches, C. R., Diallo, R., Jones, M. P. 1997: Striga on rice in West Africa, crop host range and potential of host resistance. Crop Protection, 16, 153-157.
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Striga on rice in West Africa, crop host range and potential of host resistanceCrop Protection16153157)| false
Ejeta, G., Mohammed, A., Rich, P., Melakeberhan, A., Housley, T. L., Hess, D. E. 1999: Selection for specific mechanisms of resistance to Striga in sorghum. Workshop on Breeding for Striga Resistance in Cereals. Ibadan, Nigeria. 16-20 August, 1999.