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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 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...

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...

Aspects on the distribution, etiology, symptomatology, genetic, cultural, and chemical control of the halo blight of beans, caused by Pseudomonas phaseolicola, are given. The results obtained in previous assessment and in trials on plant survival under field and greenhouse conditions of 6 bacteri...

The main administrative activities (changes, meetings, agreements, visits of CIAT staff, evaluating committee of PROFRIZA, and publications) of the Regional Bean Program for the Andean Zone (PROFRIZA) during the 1st semester of 1990 are reported. The most important technical activities regarding ...

The improvement strategy of climbing bean in Cusco should take into account the importance of maize as a crop. In a recent study in 2 maize-growing communities of Valle Sagrado, 75 and 88 percent of the farmers considered beans as the main crop; however, only 57 and 22 percent of the maize-growin...

The International Bean Rust Nursery (IBRN) is in charge of testing promising Phaseolus vulgaris cv. and lines for their resistacne to rust (Uromyces phaseoli). In 1975-76 132 bean lines were tested, among which there were 28 potential rust-race differentials. In 1977-78, 26 trials were planted wi...

The formation of centers of genetic diversity of Phaseolus spp. in different parts of the world is discussed. Botanical, archeological and ethnobotanical arguments are given to support the statement that the primary center of origin was in the Americas, with 2 subcenters or centers of diversity (...

Activities carried out by the Instituto Colombiano Agropecuario (ICA)-CIAT collaborative project on beans for cold climates in ICA`s regional center in Obonuco and in the dept. of Narino (Colombia) are reported. On the exptl. farm, 6233 materials were evaluated in bush bean trials, of which 103 w...