publication
Physiological and Biochemical Mechanisms of Plant Adaptation to Low-Fertility Acid Soils of the Tropics: The Case of Brachiariagrasses
https://hdl.handle.net/10568/78687
Publication year
2011
Authors
Watanabe, T.
Khan, S.H.
Rao, Idupulapati M.
Wasaki, J
Shinano, Takuro
Ishitani, Manabu
Ishikawa, H.
Ishikawa, S.
Tawaraya, K
Nanamori, M…
publication
Inter and Intra-Specific Variation of Legumes and Mechanisms to Access and Adapt to Less Available Soil Phosphorus and Rock Phosphate
https://hdl.handle.net/10568/78734
Publication year
2011
Authors
Nandwa, S. M.
Bationo, B. André
Obanyi, S.N.
Rao, Idupulapati M.
Sanginga, Nteranya
Vanlauwe, Bernard
Full Citation
Nandwa, S. M.; Bationo, A…
publication
Soil microbiology
https://hdl.handle.net/10568/81613
Abstract
Se describen los resultados obtenidos durante 1981 por la seccion de Microbiologia del Suelo del Programa de Pastos Tropicales del CIAT, cuyos objetivos especificos son: 1) seleccionar leguminosas forrajeras promisorias que no requieren inoculacion; 2) seleccionar cepas de Rhizobium para leguminosas que si necesitan inoculacion; y 3) evaluar el efecto de las tecnicas de inoculacion y practicas de manejo de pastos en la nodulacion y fijacion de N en el campo. Se presentan…
publication
Response of Crop Plants to Nitrogen Stress Opportunities to Increase Nitrogen Use Efficiency
https://hdl.handle.net/10568/78732
Publication year
2016
Authors
Rane, Jagadish
Ishitani, Manabu
Rao, Idupulapati M.
Full Citation
Rane, Jagadish; Ishitani, Manabu; Rao, Idupulapati M. 2010. Response of Crop Plants to Nitrogen Stress Opportunities to Increase Nitrogen Use Efficiency. In:…
publication
Root turnover and nutrient cycling in native and introduced pastures in tropical savannas
https://hdl.handle.net/10568/78685
Publication year
2001
Authors
Rao, Idupulapati M.
Plazas, C.
Ricaurte, Jaumer
Full Citation
Rao, I. M.; Plazas, C.; Ricaurte, J. 2001. Root turnover and nutrient cycling in native and introduced pastures in tropical savannas. In: Horst, W. J.; Schenk, M. K.;…
publication
Tropical pastures
https://hdl.handle.net/10568/81669
Abstract
Se presenta informacion de la transformacion genetica de Stylosanthes guianensis CIAT 184, obtenida por regeneracion de explantes inoculados con cepas de Agrobacterium tumefaciens y A. rhizogenes. Se describen brevemente los trabajos realizados con 14 lineas somaclonales de S. guianensis CIAT 2243 para seleccionar aquellas con adaptacion a suelos acidos. Tambien se incluye informacion sobre la elaboracion de un mapa de ligamento molecular de Brachiaria, la identificacion…
publication
Aphid-transmitted viruses
https://hdl.handle.net/10568/81682
Abstract
There are various viruses transmitted by aphids that infect beans in almost all countries; (1) BCMV causes yield losses from 35- 98 percent according to the var., time of infection and environmental conditions. The virus can attack any part of the plant and produces 3 types of symptoms: mosaic, necrosis and local lesion resistance. BCMV particles may be transmitted mechanically, in pollen and seed from infected plants, and by insect vectors. Planting date and clean…
publication
Seed pathology
https://hdl.handle.net/10568/81689
Abstract
Seeds provide an efficient method for disseminating pathogenic organisms to different locations; more than 50 percent of the major bean diseases are seed borne. Mechanical damage, which may occur during harvesting, threshing and/or planting, can affect seed viability, germination and contamination by microorganisms. Seed pathogens can be controlled with protectant fungicides that penetrate the seed coat but not the cotyledons. Systemic fungicides, which penetrate that seed…
publication
Desarrollo de germoplasma
https://hdl.handle.net/10568/81631
Abstract
During 1981 the introduction of germplasm was continued with an additional 147 clones from Brazil in the form of aseptic meristem cultures. Cassava germplasm bank evaluation for adaptation, resistance to diseases and pests, yield, and root quality is in progress in the north coast of Colombia (Media Luna, Fonseca, and Valledupar), Carimagua (Llanos Orientales), Popayan, and Palmira. General characteristics of germplasm accessions include: low yield potential of the…
publication
Control cultural de las malezas en yuca
https://hdl.handle.net/10568/81706
Abstract
Some cultural control measures of weeds in cassava are discussed: quality of the material, planting system and density, density x plant type interaction and use of mulching. In order to study the interaction plant type x planting density, var. M Mex 59 (vigorous) and M Col 22 (nonvigorous) were planted in plots of 7500 and 15,000 plants/ha; and 3 levels of weed control were established: complete, intermediate and no control. The vigorous var. was less…
publication
Germplasm screening and genetic improvement
https://hdl.handle.net/10568/81639
Publication year
1983
Authors
International Center for Tropical Agriculture
Full Citation
Germplasm screening and genetic improvement.1983.In: Centro Internacional de Agricultura Tropical. Bean Program. Annual Report 1981 . CIAT, Cali, CO. p. 9-24. (Series 02EB(1)83)
Publication Type
Book…
publication
Control integrado de enfermedades y pestes en la yuca (Manihot esculenta Crantz)
https://hdl.handle.net/10568/81713
Abstract
The reasons an integrated pest and disease control in cassava is justified are analyzed. Some cultural practices are listed that would lessen the problems caused by negative production factors within an ecosystem and would give high stable yields. Recommendations are given to maintain and enrich the existent natural biological control. Aspects related to var. resistance are discussed in detail. (CIAT…
publication
Agronomy
https://hdl.handle.net/10568/81724
Abstract
The results of regional trials for promising cassava var. under uniform improved technology are given. Trials were conducted in Media Luna, Chigorodo, Carimagua, Rio Negro, San Martin, CIAT- Palmira, CIAT-Quilichao, and Caicedonia. In 7 of the 8 sites, var. M COL 1684, CM 342-55, and CM 489-1 outyielded the best local clones. Var. M COL 1468, M COL 1684, and M COL 22 tested over 45, 40, and 40 cycles, resp. have produced weighted av. yields of 29.1, 30.8, and 22.0 t/ha, resp.…
publication
Progeny evaluation in uniform nurseries
https://hdl.handle.net/10568/81650
Abstract
The Bean Team Nursery (VEF) is the 1st uniform and multidisciplinary evaluation for adaptation and disease and insect resistance and is composed of advanced, coded CIAT hybrid lines from various breeding projects, the germplasm bank, and national programs. Among the bush bean entries, 16 percent showed resistant reactions to rust (Uromyces phaseoli) and 20 percent were intermediate. Entries resistant and intermediate to anthracnose (Colletotrichum…
publication
Soils and plant nutrition
https://hdl.handle.net/10568/81737
Abstract
Efforts to develop cassava technology for the vast areas of acid infertile soils were continued Large-scale germplasm screening in the field was begun in Carimagua for tolerance to low levels of P and acidity and in Quilichao, for tolerance to low levels of P. Various fertilizer trials were used to determine: (a) nutrient absorption and distribution within the plant during a 12-mo. growth cycle; (b) the long-term effect of N, P, K applications on soil fertility and…
