OAR@ICRISATProceedings of the Second International Workshop on StrigaK VRamaiahauthorM J VRaoauthorVKumbleauthorMore than 1800 phanerogamic parasites have been recorded throughout the world. Among the most important are the parasitic figworts or Scrophulariaceae, which are economically damaging root parasites. The genus Striga, with more than 50 species, belongs to this family; however, only a few are completely parasitic and damaging to their hosts. Undoubtedly, the major species are S. hermonthica-a widespread and important pest of cereals in Af r ica-and S, asiatica, an important pest both in Asia and in eastern and southern Africa. Although precise estimates of crop loss are difficult to make and data are incomplete, it is well known that severe losses, amounting in many seasons to total crop failure, are caused by these parasitic weeds. However, there is still a general lack of awareness of the magnitude and importance of the problem. These Proceedings bring together the results of discussions held at Ouagadougou, Upper Volta, in October 1981, where the latest research findings and proposals for further research were presented. They highlight the important advances made in knowledge of the pest species, methods of control, and techniques for breeding for resistance to these noxious weeds. It is hoped that this publication will prompt increased effort to be focused on methods of combat ing Striga and reducing the serious losses it causes to cereal production, and on strengthening links between scientists working in numerous programs to produce solutions to outstanding research roblems.Agriculture-Farming, Production, Technology, Economics1983International Crops Research Institute for the Semi-Arid TropicsMonograph

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