Rice blast disease management
1989
Marchetti, M.A. | Bonman, J.M. (U.S. Dept. of Agriculture, Beaumont, Texas (USA). Agricultural Research Service)
Effective disease management is best achieved by employing all available technologies, be they chemical, cultural, or genetic. The effectiveness of one disease control measure is enhanced when used with others. Chemical control, though a valuable measure, is discussed only briefly. The adjustment of certain cultural practices such as time of planting, fertilization, and water management - influences the onset and development of rice blast. The effectiveness of these disease management practices is enhanced greatly when applied to disease-resistant rice varieties. Because the rice blast pathogen Pyricularia oryzae comprises many pathogenic races, breeding for simply inherited complete resistance has proven unsatisfactory in many rice-growing areas, particularly in upland culture. But there is strong evidence that durable race - nonspecific partial resistance can be developed and improved in rice varieties through judicious choice of parents, to accumulate in the breeding population many genes that contribute to partial resistance.
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