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The genetic changes occuring in av. productivity, adaptation, and response to environments with different levels of yield for black-colored grain material selected by CIAT during 1976-79 are examined. Data from 124 expt. of the International Bean Yield and Adaptation Nursery (IBYAN) of black bean...
The effect of irrigating by gravitation on yields of bean var. ICA-Palmar, applied during different growth stages,was studied. A randomized block design was used with 7 replications and 7 treatments in an area of 1.5 ha with furrows at 0.60 m (240,000 plants/ha). The system of irrigating by gravi...
The agronomic factors that should be taken into account in the management of bean yield trials are described. These include: determination of the exptl. site (plot background and soil and climatic conditions); mechanized soil preparation; materials required for field trials; fertilization (types ...
An attempt was made to highlight the typical issues concerning vegetables in urban marketing and consumption. A theoretical comparison of vegetables and staple foods was carried out. Then, the typical issues were transposed into hypotheses, which were subsequently investigated. An important issue...
The purpose of the Bean Web Blight International Nursery (VIM) is to evaluate the degree of resistance or tolerance to Thanatephorus cucumeris of bean var. or advanced lines, and select genes to be incorporated to commercial var. in the different countries where the disease is a constraint to pro...
The symptomatology and control of the principal bean diseases in Colombia are discussed, classifying them as (1) biotic: root rot caused by fungi, bacteria and nematodes; foliage diseases - anthracnose, rust, angular leaf spot, powdery mildew, Ascochyta leaf spot, gray spot, floury leaf spot, pod...
In hot, humid areas some 40 percent of stored grain in lost; however, control of RH generally requires expensive equipment. The objectives of this expt were to evaluate the behavior of bean seeds of different size, color and moisture content at different levels of RH and to correlate adsorption a...
CIAT has conducted research to develop a method for selecting drought-tolerant genotypes. Bean var. were planted during the dry season. Irrigation was suspended at the initiation of flowering in the dry treatment and the control treatment continued to be irrigated to avoid water shortage. During ...
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