Durability of resistance of popular high-yielding varieties to major insect pests and diseases of rice
2018
Santiago, G.dC. | Dunca, Ma.S.V. | Valdez, E.M.
To combat pest problems, many breeding programs emphasize the development of varieties with multiple resistance. Sources of resistance have been identified, breeding methodologies have been refined, and many varieties with multiple resistance are widely grown. However, the stability of resistance of a particular variety depends on the genetic interaction between the host plant and the pest. Durable resistance is expected to relieve rice farmers of the need to change varieties often. Durability combined with multiple pest and disease resistance will further reduce the need to apply pesticides. Re-evaluation for the resistance stability of 43 popular/high yielding rice varieties to major insect pest and disease resistance stability of 43 popular/high-yielding rice varieties to major insect pests and diseases started during the dry season of 2016 under field and greenhouse conditions. Although the resistance of some varieties was unstable, majority had maintained their reactions against the major insects pests and diseases as during the time of their reactions against the major insect pests and diseases as during the time of their release.
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