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Red rice (Oryza satlva L ) has been a serious problem in rice fields for hundreds of years and even now no effective control measure exist. In this study, new approaches were evaluated. Flooding for two weeks prior to seeding IR-22 eliminated 99 percent of the tall variety Bluebonnet 50, which ha...
This paper presents information from a participatory breeding project initiated in 1997 at the International Rice Research Institute (IRRI) in collaboration with plant breeders and social scientists from six national agricultural research institutions located in eastern India. The Indira Gandhi A...
There is a limit to the capacity of any breeding program, and the more crosses that are made, the, smaller The size of each cross. The theory of the optimum number of crosses in inbreeding crops is bristly Reviewed. The theory is unsatisfactory in determining the optimum number of crosses, but mo...
This paper describes the agricultural situation in Maramche. Village learners have been participating with Ihe Local initiatives for Biodiversity Research and Development (LI-SIRD), testing improved varieties of paddy rice. Details of the qualities of the new varieties. Qualities preferred by Ihe...
Farmers describe their activities investing in and developing their agricultural output, with details of their production and Suwarna paddy rice (an improved variety).
La cecidomyie africaine des galles du riz est un insecte ravageur du riz dont la population a recem¬ment connu une veritable explosion dans bon nombre de pays africain s. L'infestation peut provoquer la perte totale de la recolte. Les traitements insecticides pre-sentent de nombreux inconvenients...
Iron toxicity reduces rice (Otyza sativa L.) grain yield in many poorly drained swamps in West Africa. Two methods for alleviating Fe toxicity were examined, (i) the use of a resistant genotype, and l(ii) planting on ridges to aerate the upper root zone. Grain yield responses to these factors wer...
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